vendor updates

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/BUILD

@@ -0,0 +1,57 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "doc.go",
+        "scheduler_interface.go",
+        "types.go",
+        "well_known_labels.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/scheduler/algorithm",
+    deps = [
+        "//pkg/scheduler/api:go_default_library",
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//vendor/k8s.io/api/apps/v1beta1:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/api/extensions/v1beta1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "scheduler_interface_test.go",
+        "types_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//pkg/scheduler/algorithm/predicates:all-srcs",
+        "//pkg/scheduler/algorithm/priorities:all-srcs",
+    ],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package algorithm contains a generic Scheduler interface and several
+// implementations.
+package algorithm // import "k8s.io/kubernetes/pkg/scheduler/algorithm"

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/BUILD

@@ -0,0 +1,80 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "error.go",
+        "metadata.go",
+        "predicates.go",
+        "testing_helper.go",
+        "utils.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/scheduler/algorithm/predicates",
+    deps = [
+        "//pkg/apis/core/v1/helper:go_default_library",
+        "//pkg/apis/core/v1/helper/qos:go_default_library",
+        "//pkg/features:go_default_library",
+        "//pkg/kubelet/apis:go_default_library",
+        "//pkg/scheduler/algorithm:go_default_library",
+        "//pkg/scheduler/algorithm/priorities/util:go_default_library",
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//pkg/scheduler/util:go_default_library",
+        "//pkg/scheduler/volumebinder:go_default_library",
+        "//pkg/volume/util:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/api/storage/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/errors:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/rand:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+        "//vendor/k8s.io/apiserver/pkg/util/feature:go_default_library",
+        "//vendor/k8s.io/client-go/listers/core/v1:go_default_library",
+        "//vendor/k8s.io/client-go/listers/storage/v1:go_default_library",
+        "//vendor/k8s.io/client-go/util/workqueue:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "metadata_test.go",
+        "predicates_test.go",
+        "utils_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//pkg/apis/core/v1/helper:go_default_library",
+        "//pkg/kubelet/apis:go_default_library",
+        "//pkg/scheduler/algorithm:go_default_library",
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//pkg/scheduler/testing:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/api/storage/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+        "//vendor/k8s.io/apiserver/pkg/util/feature:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/error.go

@@ -0,0 +1,150 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+)
+
+var (
+	// The predicateName tries to be consistent as the predicate name used in DefaultAlgorithmProvider defined in
+	// defaults.go (which tend to be stable for backward compatibility)
+
+	// NOTE: If you add a new predicate failure error for a predicate that can never
+	// be made to pass by removing pods, or you change an existing predicate so that
+	// it can never be made to pass by removing pods, you need to add the predicate
+	// failure error in nodesWherePreemptionMightHelp() in scheduler/core/generic_scheduler.go
+
+	// ErrDiskConflict is used for NoDiskConflict predicate error.
+	ErrDiskConflict = newPredicateFailureError("NoDiskConflict", "node(s) had no available disk")
+	// ErrVolumeZoneConflict is used for NoVolumeZoneConflict predicate error.
+	ErrVolumeZoneConflict = newPredicateFailureError("NoVolumeZoneConflict", "node(s) had no available volume zone")
+	// ErrNodeSelectorNotMatch is used for MatchNodeSelector predicate error.
+	ErrNodeSelectorNotMatch = newPredicateFailureError("MatchNodeSelector", "node(s) didn't match node selector")
+	// ErrPodAffinityNotMatch is used for MatchInterPodAffinity predicate error.
+	ErrPodAffinityNotMatch = newPredicateFailureError("MatchInterPodAffinity", "node(s) didn't match pod affinity/anti-affinity")
+	// ErrPodAffinityRulesNotMatch is used for PodAffinityRulesNotMatch predicate error.
+	ErrPodAffinityRulesNotMatch = newPredicateFailureError("PodAffinityRulesNotMatch", "node(s) didn't match pod affinity rules")
+	// ErrPodAntiAffinityRulesNotMatch is used for PodAntiAffinityRulesNotMatch predicate error.
+	ErrPodAntiAffinityRulesNotMatch = newPredicateFailureError("PodAntiAffinityRulesNotMatch", "node(s) didn't match pod anti-affinity rules")
+	// ErrExistingPodsAntiAffinityRulesNotMatch is used for ExistingPodsAntiAffinityRulesNotMatch predicate error.
+	ErrExistingPodsAntiAffinityRulesNotMatch = newPredicateFailureError("ExistingPodsAntiAffinityRulesNotMatch", "node(s) didn't satisfy existing pods anti-affinity rules")
+	// ErrTaintsTolerationsNotMatch is used for PodToleratesNodeTaints predicate error.
+	ErrTaintsTolerationsNotMatch = newPredicateFailureError("PodToleratesNodeTaints", "node(s) had taints that the pod didn't tolerate")
+	// ErrPodNotMatchHostName is used for HostName predicate error.
+	ErrPodNotMatchHostName = newPredicateFailureError("HostName", "node(s) didn't match the requested hostname")
+	// ErrPodNotFitsHostPorts is used for PodFitsHostPorts predicate error.
+	ErrPodNotFitsHostPorts = newPredicateFailureError("PodFitsHostPorts", "node(s) didn't have free ports for the requested pod ports")
+	// ErrNodeLabelPresenceViolated is used for CheckNodeLabelPresence predicate error.
+	ErrNodeLabelPresenceViolated = newPredicateFailureError("CheckNodeLabelPresence", "node(s) didn't have the requested labels")
+	// ErrServiceAffinityViolated is used for CheckServiceAffinity predicate error.
+	ErrServiceAffinityViolated = newPredicateFailureError("CheckServiceAffinity", "node(s) didn't match service affinity")
+	// ErrMaxVolumeCountExceeded is used for MaxVolumeCount predicate error.
+	ErrMaxVolumeCountExceeded = newPredicateFailureError("MaxVolumeCount", "node(s) exceed max volume count")
+	// ErrNodeUnderMemoryPressure is used for NodeUnderMemoryPressure predicate error.
+	ErrNodeUnderMemoryPressure = newPredicateFailureError("NodeUnderMemoryPressure", "node(s) had memory pressure")
+	// ErrNodeUnderDiskPressure is used for NodeUnderDiskPressure predicate error.
+	ErrNodeUnderDiskPressure = newPredicateFailureError("NodeUnderDiskPressure", "node(s) had disk pressure")
+	// ErrNodeOutOfDisk is used for NodeOutOfDisk predicate error.
+	ErrNodeOutOfDisk = newPredicateFailureError("NodeOutOfDisk", "node(s) were out of disk space")
+	// ErrNodeNotReady is used for NodeNotReady predicate error.
+	ErrNodeNotReady = newPredicateFailureError("NodeNotReady", "node(s) were not ready")
+	// ErrNodeNetworkUnavailable is used for NodeNetworkUnavailable predicate error.
+	ErrNodeNetworkUnavailable = newPredicateFailureError("NodeNetworkUnavailable", "node(s) had unavailable network")
+	// ErrNodeUnschedulable is used for NodeUnschedulable predicate error.
+	ErrNodeUnschedulable = newPredicateFailureError("NodeUnschedulable", "node(s) were unschedulable")
+	// ErrNodeUnknownCondition is used for NodeUnknownCondition predicate error.
+	ErrNodeUnknownCondition = newPredicateFailureError("NodeUnknownCondition", "node(s) had unknown conditions")
+	// ErrVolumeNodeConflict is used for VolumeNodeAffinityConflict predicate error.
+	ErrVolumeNodeConflict = newPredicateFailureError("VolumeNodeAffinityConflict", "node(s) had volume node affinity conflict")
+	// ErrVolumeBindConflict is used for VolumeBindingNoMatch predicate error.
+	ErrVolumeBindConflict = newPredicateFailureError("VolumeBindingNoMatch", "node(s) didn't find available persistent volumes to bind")
+	// ErrFakePredicate is used for test only. The fake predicates returning false also returns error
+	// as ErrFakePredicate.
+	ErrFakePredicate = newPredicateFailureError("FakePredicateError", "Nodes failed the fake predicate")
+)
+
+// InsufficientResourceError is an error type that indicates what kind of resource limit is
+// hit and caused the unfitting failure.
+type InsufficientResourceError struct {
+	// resourceName is the name of the resource that is insufficient
+	ResourceName v1.ResourceName
+	requested    int64
+	used         int64
+	capacity     int64
+}
+
+// NewInsufficientResourceError returns an InsufficientResourceError.
+func NewInsufficientResourceError(resourceName v1.ResourceName, requested, used, capacity int64) *InsufficientResourceError {
+	return &InsufficientResourceError{
+		ResourceName: resourceName,
+		requested:    requested,
+		used:         used,
+		capacity:     capacity,
+	}
+}
+
+func (e *InsufficientResourceError) Error() string {
+	return fmt.Sprintf("Node didn't have enough resource: %s, requested: %d, used: %d, capacity: %d",
+		e.ResourceName, e.requested, e.used, e.capacity)
+}
+
+// GetReason returns the reason of the InsufficientResourceError.
+func (e *InsufficientResourceError) GetReason() string {
+	return fmt.Sprintf("Insufficient %v", e.ResourceName)
+}
+
+// GetInsufficientAmount returns the amount of the insufficient resource of the error.
+func (e *InsufficientResourceError) GetInsufficientAmount() int64 {
+	return e.requested - (e.capacity - e.used)
+}
+
+// PredicateFailureError describes a failure error of predicate.
+type PredicateFailureError struct {
+	PredicateName string
+	PredicateDesc string
+}
+
+func newPredicateFailureError(predicateName, predicateDesc string) *PredicateFailureError {
+	return &PredicateFailureError{PredicateName: predicateName, PredicateDesc: predicateDesc}
+}
+
+func (e *PredicateFailureError) Error() string {
+	return fmt.Sprintf("Predicate %s failed", e.PredicateName)
+}
+
+// GetReason returns the reason of the PredicateFailureError.
+func (e *PredicateFailureError) GetReason() string {
+	return e.PredicateDesc
+}
+
+// FailureReason describes a failure reason.
+type FailureReason struct {
+	reason string
+}
+
+// NewFailureReason creates a FailureReason with message.
+func NewFailureReason(msg string) *FailureReason {
+	return &FailureReason{reason: msg}
+}
+
+// GetReason returns the reason of the FailureReason.
+func (e *FailureReason) GetReason() string {
+	return e.reason
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/metadata.go

@@ -0,0 +1,208 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"fmt"
+	"sync"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	schedutil "k8s.io/kubernetes/pkg/scheduler/util"
+
+	"github.com/golang/glog"
+)
+
+// PredicateMetadataFactory defines a factory of predicate metadata.
+type PredicateMetadataFactory struct {
+	podLister algorithm.PodLister
+}
+
+//  Note that predicateMetadata and matchingPodAntiAffinityTerm need to be declared in the same file
+//  due to the way declarations are processed in predicate declaration unit tests.
+type matchingPodAntiAffinityTerm struct {
+	term *v1.PodAffinityTerm
+	node *v1.Node
+}
+
+// NOTE: When new fields are added/removed or logic is changed, please make sure that
+// RemovePod, AddPod, and ShallowCopy functions are updated to work with the new changes.
+type predicateMetadata struct {
+	pod           *v1.Pod
+	podBestEffort bool
+	podRequest    *schedulercache.Resource
+	podPorts      []*v1.ContainerPort
+	//key is a pod full name with the anti-affinity rules.
+	matchingAntiAffinityTerms          map[string][]matchingPodAntiAffinityTerm
+	serviceAffinityInUse               bool
+	serviceAffinityMatchingPodList     []*v1.Pod
+	serviceAffinityMatchingPodServices []*v1.Service
+	// ignoredExtendedResources is a set of extended resource names that will
+	// be ignored in the PodFitsResources predicate.
+	//
+	// They can be scheduler extender managed resources, the consumption of
+	// which should be accounted only by the extenders. This set is synthesized
+	// from scheduler extender configuration and does not change per pod.
+	ignoredExtendedResources sets.String
+}
+
+// Ensure that predicateMetadata implements algorithm.PredicateMetadata.
+var _ algorithm.PredicateMetadata = &predicateMetadata{}
+
+// PredicateMetadataProducer function produces predicate metadata.
+type PredicateMetadataProducer func(pm *predicateMetadata)
+
+var predicateMetaProducerRegisterLock sync.Mutex
+var predicateMetadataProducers = make(map[string]PredicateMetadataProducer)
+
+// RegisterPredicateMetadataProducer registers a PredicateMetadataProducer.
+func RegisterPredicateMetadataProducer(predicateName string, precomp PredicateMetadataProducer) {
+	predicateMetaProducerRegisterLock.Lock()
+	defer predicateMetaProducerRegisterLock.Unlock()
+	predicateMetadataProducers[predicateName] = precomp
+}
+
+// RegisterPredicateMetadataProducerWithExtendedResourceOptions registers a
+// PredicateMetadataProducer that creates predicate metadata with the provided
+// options for extended resources.
+//
+// See the comments in "predicateMetadata" for the explanation of the options.
+func RegisterPredicateMetadataProducerWithExtendedResourceOptions(ignoredExtendedResources sets.String) {
+	RegisterPredicateMetadataProducer("PredicateWithExtendedResourceOptions", func(pm *predicateMetadata) {
+		pm.ignoredExtendedResources = ignoredExtendedResources
+	})
+}
+
+// NewPredicateMetadataFactory creates a PredicateMetadataFactory.
+func NewPredicateMetadataFactory(podLister algorithm.PodLister) algorithm.PredicateMetadataProducer {
+	factory := &PredicateMetadataFactory{
+		podLister,
+	}
+	return factory.GetMetadata
+}
+
+// GetMetadata returns the predicateMetadata used which will be used by various predicates.
+func (pfactory *PredicateMetadataFactory) GetMetadata(pod *v1.Pod, nodeNameToInfoMap map[string]*schedulercache.NodeInfo) algorithm.PredicateMetadata {
+	// If we cannot compute metadata, just return nil
+	if pod == nil {
+		return nil
+	}
+	matchingTerms, err := getMatchingAntiAffinityTerms(pod, nodeNameToInfoMap)
+	if err != nil {
+		return nil
+	}
+	predicateMetadata := &predicateMetadata{
+		pod:                       pod,
+		podBestEffort:             isPodBestEffort(pod),
+		podRequest:                GetResourceRequest(pod),
+		podPorts:                  schedutil.GetContainerPorts(pod),
+		matchingAntiAffinityTerms: matchingTerms,
+	}
+	for predicateName, precomputeFunc := range predicateMetadataProducers {
+		glog.V(10).Infof("Precompute: %v", predicateName)
+		precomputeFunc(predicateMetadata)
+	}
+	return predicateMetadata
+}
+
+// RemovePod changes predicateMetadata assuming that the given `deletedPod` is
+// deleted from the system.
+func (meta *predicateMetadata) RemovePod(deletedPod *v1.Pod) error {
+	deletedPodFullName := schedutil.GetPodFullName(deletedPod)
+	if deletedPodFullName == schedutil.GetPodFullName(meta.pod) {
+		return fmt.Errorf("deletedPod and meta.pod must not be the same")
+	}
+	// Delete any anti-affinity rule from the deletedPod.
+	delete(meta.matchingAntiAffinityTerms, deletedPodFullName)
+	// All pods in the serviceAffinityMatchingPodList are in the same namespace.
+	// So, if the namespace of the first one is not the same as the namespace of the
+	// deletedPod, we don't need to check the list, as deletedPod isn't in the list.
+	if meta.serviceAffinityInUse &&
+		len(meta.serviceAffinityMatchingPodList) > 0 &&
+		deletedPod.Namespace == meta.serviceAffinityMatchingPodList[0].Namespace {
+		for i, pod := range meta.serviceAffinityMatchingPodList {
+			if schedutil.GetPodFullName(pod) == deletedPodFullName {
+				meta.serviceAffinityMatchingPodList = append(
+					meta.serviceAffinityMatchingPodList[:i],
+					meta.serviceAffinityMatchingPodList[i+1:]...)
+				break
+			}
+		}
+	}
+	return nil
+}
+
+// AddPod changes predicateMetadata assuming that `newPod` is added to the
+// system.
+func (meta *predicateMetadata) AddPod(addedPod *v1.Pod, nodeInfo *schedulercache.NodeInfo) error {
+	addedPodFullName := schedutil.GetPodFullName(addedPod)
+	if addedPodFullName == schedutil.GetPodFullName(meta.pod) {
+		return fmt.Errorf("addedPod and meta.pod must not be the same")
+	}
+	if nodeInfo.Node() == nil {
+		return fmt.Errorf("invalid node in nodeInfo")
+	}
+	// Add matching anti-affinity terms of the addedPod to the map.
+	podMatchingTerms, err := getMatchingAntiAffinityTermsOfExistingPod(meta.pod, addedPod, nodeInfo.Node())
+	if err != nil {
+		return err
+	}
+	if len(podMatchingTerms) > 0 {
+		existingTerms, found := meta.matchingAntiAffinityTerms[addedPodFullName]
+		if found {
+			meta.matchingAntiAffinityTerms[addedPodFullName] = append(existingTerms,
+				podMatchingTerms...)
+		} else {
+			meta.matchingAntiAffinityTerms[addedPodFullName] = podMatchingTerms
+		}
+	}
+	// If addedPod is in the same namespace as the meta.pod, update the list
+	// of matching pods if applicable.
+	if meta.serviceAffinityInUse && addedPod.Namespace == meta.pod.Namespace {
+		selector := CreateSelectorFromLabels(meta.pod.Labels)
+		if selector.Matches(labels.Set(addedPod.Labels)) {
+			meta.serviceAffinityMatchingPodList = append(meta.serviceAffinityMatchingPodList,
+				addedPod)
+		}
+	}
+	return nil
+}
+
+// ShallowCopy copies a metadata struct into a new struct and creates a copy of
+// its maps and slices, but it does not copy the contents of pointer values.
+func (meta *predicateMetadata) ShallowCopy() algorithm.PredicateMetadata {
+	newPredMeta := &predicateMetadata{
+		pod:                      meta.pod,
+		podBestEffort:            meta.podBestEffort,
+		podRequest:               meta.podRequest,
+		serviceAffinityInUse:     meta.serviceAffinityInUse,
+		ignoredExtendedResources: meta.ignoredExtendedResources,
+	}
+	newPredMeta.podPorts = append([]*v1.ContainerPort(nil), meta.podPorts...)
+	newPredMeta.matchingAntiAffinityTerms = map[string][]matchingPodAntiAffinityTerm{}
+	for k, v := range meta.matchingAntiAffinityTerms {
+		newPredMeta.matchingAntiAffinityTerms[k] = append([]matchingPodAntiAffinityTerm(nil), v...)
+	}
+	newPredMeta.serviceAffinityMatchingPodServices = append([]*v1.Service(nil),
+		meta.serviceAffinityMatchingPodServices...)
+	newPredMeta.serviceAffinityMatchingPodList = append([]*v1.Pod(nil),
+		meta.serviceAffinityMatchingPodList...)
+	return (algorithm.PredicateMetadata)(newPredMeta)
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/metadata_test.go

@@ -0,0 +1,408 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"fmt"
+	"reflect"
+	"sort"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	schedulertesting "k8s.io/kubernetes/pkg/scheduler/testing"
+)
+
+// sortableAntiAffinityTerms lets us to sort anti-affinity terms.
+type sortableAntiAffinityTerms []matchingPodAntiAffinityTerm
+
+// Less establishes some ordering between two matchingPodAntiAffinityTerms for
+// sorting.
+func (s sortableAntiAffinityTerms) Less(i, j int) bool {
+	t1, t2 := s[i], s[j]
+	if t1.node.Name != t2.node.Name {
+		return t1.node.Name < t2.node.Name
+	}
+	if len(t1.term.Namespaces) != len(t2.term.Namespaces) {
+		return len(t1.term.Namespaces) < len(t2.term.Namespaces)
+	}
+	if t1.term.TopologyKey != t2.term.TopologyKey {
+		return t1.term.TopologyKey < t2.term.TopologyKey
+	}
+	if len(t1.term.LabelSelector.MatchLabels) != len(t2.term.LabelSelector.MatchLabels) {
+		return len(t1.term.LabelSelector.MatchLabels) < len(t2.term.LabelSelector.MatchLabels)
+	}
+	return false
+}
+func (s sortableAntiAffinityTerms) Len() int { return len(s) }
+func (s sortableAntiAffinityTerms) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+var _ = sort.Interface(sortableAntiAffinityTerms{})
+
+func sortAntiAffinityTerms(terms map[string][]matchingPodAntiAffinityTerm) {
+	for k, v := range terms {
+		sortableTerms := sortableAntiAffinityTerms(v)
+		sort.Sort(sortableTerms)
+		terms[k] = sortableTerms
+	}
+}
+
+// sortablePods lets us to sort pods.
+type sortablePods []*v1.Pod
+
+func (s sortablePods) Less(i, j int) bool {
+	return s[i].Namespace < s[j].Namespace ||
+		(s[i].Namespace == s[j].Namespace && s[i].Name < s[j].Name)
+}
+func (s sortablePods) Len() int      { return len(s) }
+func (s sortablePods) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
+
+var _ = sort.Interface(&sortablePods{})
+
+// sortableServices allows us to sort services.
+type sortableServices []*v1.Service
+
+func (s sortableServices) Less(i, j int) bool {
+	return s[i].Namespace < s[j].Namespace ||
+		(s[i].Namespace == s[j].Namespace && s[i].Name < s[j].Name)
+}
+func (s sortableServices) Len() int      { return len(s) }
+func (s sortableServices) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
+
+var _ = sort.Interface(&sortableServices{})
+
+// predicateMetadataEquivalent returns true if the two metadata are equivalent.
+// Note: this function does not compare podRequest.
+func predicateMetadataEquivalent(meta1, meta2 *predicateMetadata) error {
+	if !reflect.DeepEqual(meta1.pod, meta2.pod) {
+		return fmt.Errorf("pods are not the same")
+	}
+	if meta1.podBestEffort != meta2.podBestEffort {
+		return fmt.Errorf("podBestEfforts are not equal")
+	}
+	if meta1.serviceAffinityInUse != meta1.serviceAffinityInUse {
+		return fmt.Errorf("serviceAffinityInUses are not equal")
+	}
+	if len(meta1.podPorts) != len(meta2.podPorts) {
+		return fmt.Errorf("podPorts are not equal")
+	}
+	for !reflect.DeepEqual(meta1.podPorts, meta2.podPorts) {
+		return fmt.Errorf("podPorts are not equal")
+	}
+	sortAntiAffinityTerms(meta1.matchingAntiAffinityTerms)
+	sortAntiAffinityTerms(meta2.matchingAntiAffinityTerms)
+	if !reflect.DeepEqual(meta1.matchingAntiAffinityTerms, meta2.matchingAntiAffinityTerms) {
+		return fmt.Errorf("matchingAntiAffinityTerms are not euqal")
+	}
+	if meta1.serviceAffinityInUse {
+		sortablePods1 := sortablePods(meta1.serviceAffinityMatchingPodList)
+		sort.Sort(sortablePods1)
+		sortablePods2 := sortablePods(meta2.serviceAffinityMatchingPodList)
+		sort.Sort(sortablePods2)
+		if !reflect.DeepEqual(sortablePods1, sortablePods2) {
+			return fmt.Errorf("serviceAffinityMatchingPodLists are not euqal")
+		}
+
+		sortableServices1 := sortableServices(meta1.serviceAffinityMatchingPodServices)
+		sort.Sort(sortableServices1)
+		sortableServices2 := sortableServices(meta2.serviceAffinityMatchingPodServices)
+		sort.Sort(sortableServices2)
+		if !reflect.DeepEqual(sortableServices1, sortableServices2) {
+			return fmt.Errorf("serviceAffinityMatchingPodServices are not euqal")
+		}
+	}
+	return nil
+}
+
+func TestPredicateMetadata_AddRemovePod(t *testing.T) {
+	var label1 = map[string]string{
+		"region": "r1",
+		"zone":   "z11",
+	}
+	var label2 = map[string]string{
+		"region": "r1",
+		"zone":   "z12",
+	}
+	var label3 = map[string]string{
+		"region": "r2",
+		"zone":   "z21",
+	}
+	selector1 := map[string]string{"foo": "bar"}
+	antiAffinityFooBar := &v1.PodAntiAffinity{
+		RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+			{
+				LabelSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Key:      "foo",
+							Operator: metav1.LabelSelectorOpIn,
+							Values:   []string{"bar"},
+						},
+					},
+				},
+				TopologyKey: "region",
+			},
+		},
+	}
+	antiAffinityComplex := &v1.PodAntiAffinity{
+		RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+			{
+				LabelSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Key:      "foo",
+							Operator: metav1.LabelSelectorOpIn,
+							Values:   []string{"bar", "buzz"},
+						},
+					},
+				},
+				TopologyKey: "region",
+			},
+			{
+				LabelSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Key:      "service",
+							Operator: metav1.LabelSelectorOpNotIn,
+							Values:   []string{"bar", "security", "test"},
+						},
+					},
+				},
+				TopologyKey: "zone",
+			},
+		},
+	}
+
+	tests := []struct {
+		description  string
+		pendingPod   *v1.Pod
+		addedPod     *v1.Pod
+		existingPods []*v1.Pod
+		nodes        []*v1.Node
+		services     []*v1.Service
+	}{
+		{
+			description: "no anti-affinity or service affinity exist",
+			pendingPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pending", Labels: selector1},
+			},
+			existingPods: []*v1.Pod{
+				{ObjectMeta: metav1.ObjectMeta{Name: "p1", Labels: selector1},
+					Spec: v1.PodSpec{NodeName: "nodeA"},
+				},
+				{ObjectMeta: metav1.ObjectMeta{Name: "p2"},
+					Spec: v1.PodSpec{NodeName: "nodeC"},
+				},
+			},
+			addedPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "addedPod", Labels: selector1},
+				Spec:       v1.PodSpec{NodeName: "nodeB"},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeA", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeB", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeC", Labels: label3}},
+			},
+		},
+		{
+			description: "metadata anti-affinity terms are updated correctly after adding and removing a pod",
+			pendingPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pending", Labels: selector1},
+			},
+			existingPods: []*v1.Pod{
+				{ObjectMeta: metav1.ObjectMeta{Name: "p1", Labels: selector1},
+					Spec: v1.PodSpec{NodeName: "nodeA"},
+				},
+				{ObjectMeta: metav1.ObjectMeta{Name: "p2"},
+					Spec: v1.PodSpec{
+						NodeName: "nodeC",
+						Affinity: &v1.Affinity{
+							PodAntiAffinity: antiAffinityFooBar,
+						},
+					},
+				},
+			},
+			addedPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "addedPod", Labels: selector1},
+				Spec: v1.PodSpec{
+					NodeName: "nodeB",
+					Affinity: &v1.Affinity{
+						PodAntiAffinity: antiAffinityFooBar,
+					},
+				},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeA", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeB", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeC", Labels: label3}},
+			},
+		},
+		{
+			description: "metadata service-affinity data are updated correctly after adding and removing a pod",
+			pendingPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pending", Labels: selector1},
+			},
+			existingPods: []*v1.Pod{
+				{ObjectMeta: metav1.ObjectMeta{Name: "p1", Labels: selector1},
+					Spec: v1.PodSpec{NodeName: "nodeA"},
+				},
+				{ObjectMeta: metav1.ObjectMeta{Name: "p2"},
+					Spec: v1.PodSpec{NodeName: "nodeC"},
+				},
+			},
+			addedPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "addedPod", Labels: selector1},
+				Spec:       v1.PodSpec{NodeName: "nodeB"},
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: selector1}}},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeA", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeB", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeC", Labels: label3}},
+			},
+		},
+		{
+			description: "metadata anti-affinity terms and service affinity data are updated correctly after adding and removing a pod",
+			pendingPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pending", Labels: selector1},
+			},
+			existingPods: []*v1.Pod{
+				{ObjectMeta: metav1.ObjectMeta{Name: "p1", Labels: selector1},
+					Spec: v1.PodSpec{NodeName: "nodeA"},
+				},
+				{ObjectMeta: metav1.ObjectMeta{Name: "p2"},
+					Spec: v1.PodSpec{
+						NodeName: "nodeC",
+						Affinity: &v1.Affinity{
+							PodAntiAffinity: antiAffinityFooBar,
+						},
+					},
+				},
+			},
+			addedPod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "addedPod", Labels: selector1},
+				Spec: v1.PodSpec{
+					NodeName: "nodeA",
+					Affinity: &v1.Affinity{
+						PodAntiAffinity: antiAffinityComplex,
+					},
+				},
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: selector1}}},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeA", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeB", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "nodeC", Labels: label3}},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		allPodLister := schedulertesting.FakePodLister(append(test.existingPods, test.addedPod))
+		// getMeta creates predicate meta data given the list of pods.
+		getMeta := func(lister schedulertesting.FakePodLister) (*predicateMetadata, map[string]*schedulercache.NodeInfo) {
+			nodeInfoMap := schedulercache.CreateNodeNameToInfoMap(lister, test.nodes)
+			// nodeList is a list of non-pointer nodes to feed to FakeNodeListInfo.
+			nodeList := []v1.Node{}
+			for _, n := range test.nodes {
+				nodeList = append(nodeList, *n)
+			}
+			_, precompute := NewServiceAffinityPredicate(lister, schedulertesting.FakeServiceLister(test.services), FakeNodeListInfo(nodeList), nil)
+			RegisterPredicateMetadataProducer("ServiceAffinityMetaProducer", precompute)
+			pmf := PredicateMetadataFactory{lister}
+			meta := pmf.GetMetadata(test.pendingPod, nodeInfoMap)
+			return meta.(*predicateMetadata), nodeInfoMap
+		}
+
+		// allPodsMeta is meta data produced when all pods, including test.addedPod
+		// are given to the metadata producer.
+		allPodsMeta, _ := getMeta(allPodLister)
+		// existingPodsMeta1 is meta data produced for test.existingPods (without test.addedPod).
+		existingPodsMeta1, nodeInfoMap := getMeta(schedulertesting.FakePodLister(test.existingPods))
+		// Add test.addedPod to existingPodsMeta1 and make sure meta is equal to allPodsMeta
+		nodeInfo := nodeInfoMap[test.addedPod.Spec.NodeName]
+		if err := existingPodsMeta1.AddPod(test.addedPod, nodeInfo); err != nil {
+			t.Errorf("test [%v]: error adding pod to meta: %v", test.description, err)
+		}
+		if err := predicateMetadataEquivalent(allPodsMeta, existingPodsMeta1); err != nil {
+			t.Errorf("test [%v]: meta data are not equivalent: %v", test.description, err)
+		}
+		// Remove the added pod and from existingPodsMeta1 an make sure it is equal
+		// to meta generated for existing pods.
+		existingPodsMeta2, _ := getMeta(schedulertesting.FakePodLister(test.existingPods))
+		if err := existingPodsMeta1.RemovePod(test.addedPod); err != nil {
+			t.Errorf("test [%v]: error removing pod from meta: %v", test.description, err)
+		}
+		if err := predicateMetadataEquivalent(existingPodsMeta1, existingPodsMeta2); err != nil {
+			t.Errorf("test [%v]: meta data are not equivalent: %v", test.description, err)
+		}
+	}
+}
+
+// TestPredicateMetadata_ShallowCopy tests the ShallowCopy function. It is based
+// on the idea that shallow-copy should produce an object that is deep-equal to the original
+// object.
+func TestPredicateMetadata_ShallowCopy(t *testing.T) {
+	source := predicateMetadata{
+		pod: &v1.Pod{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "test",
+				Namespace: "testns",
+			},
+		},
+		podBestEffort: true,
+		podRequest: &schedulercache.Resource{
+			MilliCPU:         1000,
+			Memory:           300,
+			AllowedPodNumber: 4,
+		},
+		podPorts: []*v1.ContainerPort{
+			{
+				Name:          "name",
+				HostPort:      10,
+				ContainerPort: 20,
+				Protocol:      "TCP",
+				HostIP:        "1.2.3.4",
+			},
+		},
+		matchingAntiAffinityTerms: map[string][]matchingPodAntiAffinityTerm{
+			"term1": {
+				{
+					term: &v1.PodAffinityTerm{TopologyKey: "node"},
+					node: &v1.Node{
+						ObjectMeta: metav1.ObjectMeta{Name: "machine1"},
+					},
+				},
+			},
+		},
+		serviceAffinityInUse: true,
+		serviceAffinityMatchingPodList: []*v1.Pod{
+			{ObjectMeta: metav1.ObjectMeta{Name: "pod1"}},
+			{ObjectMeta: metav1.ObjectMeta{Name: "pod2"}},
+		},
+		serviceAffinityMatchingPodServices: []*v1.Service{
+			{ObjectMeta: metav1.ObjectMeta{Name: "service1"}},
+		},
+	}
+
+	if !reflect.DeepEqual(source.ShallowCopy().(*predicateMetadata), &source) {
+		t.Errorf("Copy is not equal to source!")
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/testing_helper.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	storagev1 "k8s.io/api/storage/v1"
+)
+
+// FakePersistentVolumeClaimInfo declares a []v1.PersistentVolumeClaim type for testing.
+type FakePersistentVolumeClaimInfo []v1.PersistentVolumeClaim
+
+// GetPersistentVolumeClaimInfo gets PVC matching the namespace and PVC ID.
+func (pvcs FakePersistentVolumeClaimInfo) GetPersistentVolumeClaimInfo(namespace string, pvcID string) (*v1.PersistentVolumeClaim, error) {
+	for _, pvc := range pvcs {
+		if pvc.Name == pvcID && pvc.Namespace == namespace {
+			return &pvc, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find persistent volume claim: %s/%s", namespace, pvcID)
+}
+
+// FakeNodeInfo declares a v1.Node type for testing.
+type FakeNodeInfo v1.Node
+
+// GetNodeInfo return a fake node info object.
+func (n FakeNodeInfo) GetNodeInfo(nodeName string) (*v1.Node, error) {
+	node := v1.Node(n)
+	return &node, nil
+}
+
+// FakeNodeListInfo declares a []v1.Node type for testing.
+type FakeNodeListInfo []v1.Node
+
+// GetNodeInfo returns a fake node object in the fake nodes.
+func (nodes FakeNodeListInfo) GetNodeInfo(nodeName string) (*v1.Node, error) {
+	for _, node := range nodes {
+		if node.Name == nodeName {
+			return &node, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find node: %s", nodeName)
+}
+
+// FakePersistentVolumeInfo declares a []v1.PersistentVolume type for testing.
+type FakePersistentVolumeInfo []v1.PersistentVolume
+
+// GetPersistentVolumeInfo returns a fake PV object in the fake PVs by PV ID.
+func (pvs FakePersistentVolumeInfo) GetPersistentVolumeInfo(pvID string) (*v1.PersistentVolume, error) {
+	for _, pv := range pvs {
+		if pv.Name == pvID {
+			return &pv, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find persistent volume: %s", pvID)
+}
+
+// FakeStorageClassInfo declares a []storagev1.StorageClass type for testing.
+type FakeStorageClassInfo []storagev1.StorageClass
+
+// GetStorageClassInfo returns a fake storage class object in the fake storage classes by name.
+func (classes FakeStorageClassInfo) GetStorageClassInfo(name string) (*storagev1.StorageClass, error) {
+	for _, sc := range classes {
+		if sc.Name == name {
+			return &sc, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find storage class: %s", name)
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/utils.go

@@ -0,0 +1,146 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	schedutil "k8s.io/kubernetes/pkg/scheduler/util"
+)
+
+// FindLabelsInSet gets as many key/value pairs as possible out of a label set.
+func FindLabelsInSet(labelsToKeep []string, selector labels.Set) map[string]string {
+	aL := make(map[string]string)
+	for _, l := range labelsToKeep {
+		if selector.Has(l) {
+			aL[l] = selector.Get(l)
+		}
+	}
+	return aL
+}
+
+// AddUnsetLabelsToMap backfills missing values with values we find in a map.
+func AddUnsetLabelsToMap(aL map[string]string, labelsToAdd []string, labelSet labels.Set) {
+	for _, l := range labelsToAdd {
+		// if the label is already there, dont overwrite it.
+		if _, exists := aL[l]; exists {
+			continue
+		}
+		// otherwise, backfill this label.
+		if labelSet.Has(l) {
+			aL[l] = labelSet.Get(l)
+		}
+	}
+}
+
+// FilterPodsByNamespace filters pods outside a namespace from the given list.
+func FilterPodsByNamespace(pods []*v1.Pod, ns string) []*v1.Pod {
+	filtered := []*v1.Pod{}
+	for _, nsPod := range pods {
+		if nsPod.Namespace == ns {
+			filtered = append(filtered, nsPod)
+		}
+	}
+	return filtered
+}
+
+// CreateSelectorFromLabels is used to define a selector that corresponds to the keys in a map.
+func CreateSelectorFromLabels(aL map[string]string) labels.Selector {
+	if aL == nil || len(aL) == 0 {
+		return labels.Everything()
+	}
+	return labels.Set(aL).AsSelector()
+}
+
+// EquivalencePodGenerator is a generator of equivalence class for pod with consideration of PVC info.
+type EquivalencePodGenerator struct {
+	pvcInfo PersistentVolumeClaimInfo
+}
+
+// NewEquivalencePodGenerator returns a getEquivalencePod method with consideration of PVC info.
+func NewEquivalencePodGenerator(pvcInfo PersistentVolumeClaimInfo) algorithm.GetEquivalencePodFunc {
+	g := &EquivalencePodGenerator{
+		pvcInfo: pvcInfo,
+	}
+	return g.getEquivalencePod
+}
+
+// GetEquivalencePod returns a EquivalencePod which contains a group of pod attributes which can be reused.
+func (e *EquivalencePodGenerator) getEquivalencePod(pod *v1.Pod) interface{} {
+	// For now we only consider pods:
+	// 1. OwnerReferences is Controller
+	// 2. with same OwnerReferences
+	// 3. with same PVC claim
+	// to be equivalent
+	for _, ref := range pod.OwnerReferences {
+		if ref.Controller != nil && *ref.Controller {
+			pvcSet, err := e.getPVCSet(pod)
+			if err == nil {
+				// A pod can only belongs to one controller, so let's return.
+				return &EquivalencePod{
+					ControllerRef: ref,
+					PVCSet:        pvcSet,
+				}
+			}
+
+			// If error encountered, log warning and return nil (i.e. no equivalent pod found)
+			glog.Warningf("[EquivalencePodGenerator] for pod: %v failed due to: %v", pod.GetName(), err)
+			return nil
+		}
+	}
+	return nil
+}
+
+// getPVCSet returns a set of PVC UIDs of given pod.
+func (e *EquivalencePodGenerator) getPVCSet(pod *v1.Pod) (sets.String, error) {
+	result := sets.NewString()
+	for _, volume := range pod.Spec.Volumes {
+		if volume.PersistentVolumeClaim == nil {
+			continue
+		}
+		pvcName := volume.PersistentVolumeClaim.ClaimName
+		pvc, err := e.pvcInfo.GetPersistentVolumeClaimInfo(pod.GetNamespace(), pvcName)
+		if err != nil {
+			return nil, err
+		}
+		result.Insert(string(pvc.UID))
+	}
+
+	return result, nil
+}
+
+// EquivalencePod is a group of pod attributes which can be reused as equivalence to schedule other pods.
+type EquivalencePod struct {
+	ControllerRef metav1.OwnerReference
+	PVCSet        sets.String
+}
+
+// portsConflict check whether existingPorts and wantPorts conflict with each other
+// return true if we have a conflict
+func portsConflict(existingPorts schedutil.HostPortInfo, wantPorts []*v1.ContainerPort) bool {
+	for _, cp := range wantPorts {
+		if existingPorts.CheckConflict(cp.HostIP, string(cp.Protocol), cp.HostPort) {
+			return true
+		}
+	}
+
+	return false
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/predicates/utils_test.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+)
+
+// ExampleUtils is a https://blog.golang.org/examples styled unit test.
+func ExampleFindLabelsInSet() {
+	labelSubset := labels.Set{}
+	labelSubset["label1"] = "value1"
+	labelSubset["label2"] = "value2"
+	// Lets make believe that these pods are on the cluster.
+	// Utility functions will inspect their labels, filter them, and so on.
+	nsPods := []*v1.Pod{
+		{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "pod1",
+				Namespace: "ns1",
+				Labels: map[string]string{
+					"label1": "wontSeeThis",
+					"label2": "wontSeeThis",
+					"label3": "will_see_this",
+				},
+			},
+		}, // first pod which will be used via the utilities
+		{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "pod2",
+				Namespace: "ns1",
+			},
+		},
+
+		{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: "pod3ThatWeWontSee",
+			},
+		},
+	}
+	fmt.Println(FindLabelsInSet([]string{"label1", "label2", "label3"}, nsPods[0].ObjectMeta.Labels)["label3"])
+	AddUnsetLabelsToMap(labelSubset, []string{"label1", "label2", "label3"}, nsPods[0].ObjectMeta.Labels)
+	fmt.Println(labelSubset)
+
+	for _, pod := range FilterPodsByNamespace(nsPods, "ns1") {
+		fmt.Print(pod.Name, ",")
+	}
+	// Output:
+	// will_see_this
+	// label1=value1,label2=value2,label3=will_see_this
+	// pod1,pod2,
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/BUILD

@@ -0,0 +1,92 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "balanced_resource_allocation.go",
+        "image_locality.go",
+        "interpod_affinity.go",
+        "least_requested.go",
+        "metadata.go",
+        "most_requested.go",
+        "node_affinity.go",
+        "node_label.go",
+        "node_prefer_avoid_pods.go",
+        "reduce.go",
+        "resource_allocation.go",
+        "resource_limits.go",
+        "selector_spreading.go",
+        "taint_toleration.go",
+        "test_util.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities",
+    deps = [
+        "//pkg/apis/core/v1/helper:go_default_library",
+        "//pkg/scheduler/algorithm:go_default_library",
+        "//pkg/scheduler/algorithm/predicates:go_default_library",
+        "//pkg/scheduler/algorithm/priorities/util:go_default_library",
+        "//pkg/scheduler/api:go_default_library",
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//pkg/util/node:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/errors:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/client-go/util/workqueue:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "balanced_resource_allocation_test.go",
+        "image_locality_test.go",
+        "interpod_affinity_test.go",
+        "least_requested_test.go",
+        "metadata_test.go",
+        "most_requested_test.go",
+        "node_affinity_test.go",
+        "node_label_test.go",
+        "node_prefer_avoid_pods_test.go",
+        "resource_limits_test.go",
+        "selector_spreading_test.go",
+        "taint_toleration_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//pkg/kubelet/apis:go_default_library",
+        "//pkg/scheduler/algorithm/priorities/util:go_default_library",
+        "//pkg/scheduler/api:go_default_library",
+        "//pkg/scheduler/schedulercache:go_default_library",
+        "//pkg/scheduler/testing:go_default_library",
+        "//vendor/k8s.io/api/apps/v1beta1:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/api/extensions/v1beta1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//pkg/scheduler/algorithm/priorities/util:all-srcs",
+    ],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/balanced_resource_allocation.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"math"
+
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+var (
+	balancedResourcePriority = &ResourceAllocationPriority{"BalancedResourceAllocation", balancedResourceScorer}
+
+	// BalancedResourceAllocationMap favors nodes with balanced resource usage rate.
+	// BalancedResourceAllocationMap should **NOT** be used alone, and **MUST** be used together
+	// with LeastRequestedPriority. It calculates the difference between the cpu and memory fraction
+	// of capacity, and prioritizes the host based on how close the two metrics are to each other.
+	// Detail: score = 10 - abs(cpuFraction-memoryFraction)*10. The algorithm is partly inspired by:
+	// "Wei Huang et al. An Energy Efficient Virtual Machine Placement Algorithm with Balanced
+	// Resource Utilization"
+	BalancedResourceAllocationMap = balancedResourcePriority.PriorityMap
+)
+
+func balancedResourceScorer(requested, allocable *schedulercache.Resource) int64 {
+	cpuFraction := fractionOfCapacity(requested.MilliCPU, allocable.MilliCPU)
+	memoryFraction := fractionOfCapacity(requested.Memory, allocable.Memory)
+
+	if cpuFraction >= 1 || memoryFraction >= 1 {
+		// if requested >= capacity, the corresponding host should never be preferred.
+		return 0
+	}
+
+	// Upper and lower boundary of difference between cpuFraction and memoryFraction are -1 and 1
+	// respectively. Multilying the absolute value of the difference by 10 scales the value to
+	// 0-10 with 0 representing well balanced allocation and 10 poorly balanced. Subtracting it from
+	// 10 leads to the score which also scales from 0 to 10 while 10 representing well balanced.
+	diff := math.Abs(cpuFraction - memoryFraction)
+	return int64((1 - diff) * float64(schedulerapi.MaxPriority))
+}
+
+func fractionOfCapacity(requested, capacity int64) float64 {
+	if capacity == 0 {
+		return 1
+	}
+	return float64(requested) / float64(capacity)
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/balanced_resource_allocation_test.go

@@ -0,0 +1,264 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestBalancedResourceAllocation(t *testing.T) {
+	labels1 := map[string]string{
+		"foo": "bar",
+		"baz": "blah",
+	}
+	labels2 := map[string]string{
+		"bar": "foo",
+		"baz": "blah",
+	}
+	machine1Spec := v1.PodSpec{
+		NodeName: "machine1",
+	}
+	machine2Spec := v1.PodSpec{
+		NodeName: "machine2",
+	}
+	noResources := v1.PodSpec{
+		Containers: []v1.Container{},
+	}
+	cpuOnly := v1.PodSpec{
+		NodeName: "machine1",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+		},
+	}
+	cpuOnly2 := cpuOnly
+	cpuOnly2.NodeName = "machine2"
+	cpuAndMemory := v1.PodSpec{
+		NodeName: "machine2",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("2000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("3000"),
+					},
+				},
+			},
+		},
+	}
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			/*
+				Node1 scores (remaining resources) on 0-10 scale
+				CPU Fraction: 0 / 4000 = 0%
+				Memory Fraction: 0 / 10000 = 0%
+				Node1 Score: 10 - (0-0)*10 = 10
+
+				Node2 scores (remaining resources) on 0-10 scale
+				CPU Fraction: 0 / 4000 = 0 %
+				Memory Fraction: 0 / 10000 = 0%
+				Node2 Score: 10 - (0-0)*10 = 10
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "nothing scheduled, nothing requested",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 3000 / 4000= 75%
+				Memory Fraction: 5000 / 10000 = 50%
+				Node1 Score: 10 - (0.75-0.5)*10 = 7
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 3000 / 6000= 50%
+				Memory Fraction: 5000/10000 = 50%
+				Node2 Score: 10 - (0.5-0.5)*10 = 10
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 6000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 7}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "nothing scheduled, resources requested, differently sized machines",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 0 / 4000= 0%
+				Memory Fraction: 0 / 10000 = 0%
+				Node1 Score: 10 - (0-0)*10 = 10
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 0 / 4000= 0%
+				Memory Fraction: 0 / 10000 = 0%
+				Node2 Score: 10 - (0-0)*10 = 10
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "no resources requested, pods scheduled",
+			pods: []*v1.Pod{
+				{Spec: machine1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: machine1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: machine2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: machine2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 0 / 20000 = 0%
+				Node1 Score: 10 - (0.6-0)*10 = 4
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 5000 / 20000 = 25%
+				Node2 Score: 10 - (0.6-0.25)*10 = 6
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 4}, {Host: "machine2", Score: 6}},
+			test:         "no resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuOnly2, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuAndMemory, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 5000 / 20000 = 25%
+				Node1 Score: 10 - (0.6-0.25)*10 = 6
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 10000 / 20000 = 50%
+				Node2 Score: 10 - (0.6-0.5)*10 = 9
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 6}, {Host: "machine2", Score: 9}},
+			test:         "resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 5000 / 20000 = 25%
+				Node1 Score: 10 - (0.6-0.25)*10 = 6
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 6000 / 10000 = 60%
+				Memory Fraction: 10000 / 50000 = 20%
+				Node2 Score: 10 - (0.6-0.2)*10 = 6
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 50000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 6}, {Host: "machine2", Score: 6}},
+			test:         "resources requested, pods scheduled with resources, differently sized machines",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Fraction: 6000 / 4000 > 100% ==> Score := 0
+				Memory Fraction: 0 / 10000 = 0
+				Node1 Score: 0
+
+				Node2 scores on 0-10 scale
+				CPU Fraction: 6000 / 4000 > 100% ==> Score := 0
+				Memory Fraction 5000 / 10000 = 50%
+				Node2 Score: 0
+			*/
+			pod:          &v1.Pod{Spec: cpuOnly},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "requested resources exceed node capacity",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 0, 0), makeNode("machine2", 0, 0)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "zero node resources, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		list, err := priorityFunction(BalancedResourceAllocationMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/image_locality.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// This is a reasonable size range of all container images. 90%ile of images on dockerhub drops into this range.
+const (
+	mb         int64 = 1024 * 1024
+	minImgSize int64 = 23 * mb
+	maxImgSize int64 = 1000 * mb
+)
+
+// ImageLocalityPriorityMap is a priority function that favors nodes that already have requested pod container's images.
+// It will detect whether the requested images are present on a node, and then calculate a score ranging from 0 to 10
+// based on the total size of those images.
+// - If none of the images are present, this node will be given the lowest priority.
+// - If some of the images are present on a node, the larger their sizes' sum, the higher the node's priority.
+func ImageLocalityPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+
+	sumSize := totalImageSize(node, pod.Spec.Containers)
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: calculateScoreFromSize(sumSize),
+	}, nil
+}
+
+// calculateScoreFromSize calculates the priority of a node. sumSize is sum size of requested images on this node.
+// 1. Split image size range into 10 buckets.
+// 2. Decide the priority of a given sumSize based on which bucket it belongs to.
+func calculateScoreFromSize(sumSize int64) int {
+	switch {
+	case sumSize == 0 || sumSize < minImgSize:
+		// 0 means none of the images required by this pod are present on this
+		// node or the total size of the images present is too small to be taken into further consideration.
+		return 0
+
+	case sumSize >= maxImgSize:
+		// If existing images' total size is larger than max, just make it highest priority.
+		return schedulerapi.MaxPriority
+	}
+
+	return int((int64(schedulerapi.MaxPriority) * (sumSize - minImgSize) / (maxImgSize - minImgSize)) + 1)
+}
+
+// totalImageSize returns the total image size of all the containers that are already on the node.
+func totalImageSize(node *v1.Node, containers []v1.Container) int64 {
+	imageSizes := make(map[string]int64)
+	for _, image := range node.Status.Images {
+		for _, name := range image.Names {
+			imageSizes[name] = image.SizeBytes
+		}
+	}
+
+	var total int64
+	for _, container := range containers {
+		if size, ok := imageSizes[container.Image]; ok {
+			total += size
+		}
+	}
+
+	return total
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/image_locality_test.go

@@ -0,0 +1,183 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestImageLocalityPriority(t *testing.T) {
+	test40250 := v1.PodSpec{
+		Containers: []v1.Container{
+			{
+				Image: "gcr.io/40",
+			},
+			{
+				Image: "gcr.io/250",
+			},
+		},
+	}
+
+	test40140 := v1.PodSpec{
+		Containers: []v1.Container{
+			{
+				Image: "gcr.io/40",
+			},
+			{
+				Image: "gcr.io/140",
+			},
+		},
+	}
+
+	testMinMax := v1.PodSpec{
+		Containers: []v1.Container{
+			{
+				Image: "gcr.io/10",
+			},
+			{
+				Image: "gcr.io/2000",
+			},
+		},
+	}
+
+	node401402000 := v1.NodeStatus{
+		Images: []v1.ContainerImage{
+			{
+				Names: []string{
+					"gcr.io/40",
+					"gcr.io/40:v1",
+					"gcr.io/40:v1",
+				},
+				SizeBytes: int64(40 * mb),
+			},
+			{
+				Names: []string{
+					"gcr.io/140",
+					"gcr.io/140:v1",
+				},
+				SizeBytes: int64(140 * mb),
+			},
+			{
+				Names: []string{
+					"gcr.io/2000",
+				},
+				SizeBytes: int64(2000 * mb),
+			},
+		},
+	}
+
+	node25010 := v1.NodeStatus{
+		Images: []v1.ContainerImage{
+			{
+				Names: []string{
+					"gcr.io/250",
+				},
+				SizeBytes: int64(250 * mb),
+			},
+			{
+				Names: []string{
+					"gcr.io/10",
+					"gcr.io/10:v1",
+				},
+				SizeBytes: int64(10 * mb),
+			},
+		},
+	}
+
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			// Pod: gcr.io/40 gcr.io/250
+
+			// Node1
+			// Image: gcr.io/40 40MB
+			// Score: (40M-23M)/97.7M + 1 = 1
+
+			// Node2
+			// Image: gcr.io/250 250MB
+			// Score: (250M-23M)/97.7M + 1 = 3
+			pod:          &v1.Pod{Spec: test40250},
+			nodes:        []*v1.Node{makeImageNode("machine1", node401402000), makeImageNode("machine2", node25010)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 1}, {Host: "machine2", Score: 3}},
+			test:         "two images spread on two nodes, prefer the larger image one",
+		},
+		{
+			// Pod: gcr.io/40 gcr.io/140
+
+			// Node1
+			// Image: gcr.io/40 40MB, gcr.io/140 140MB
+			// Score: (40M+140M-23M)/97.7M + 1 = 2
+
+			// Node2
+			// Image: not present
+			// Score: 0
+			pod:          &v1.Pod{Spec: test40140},
+			nodes:        []*v1.Node{makeImageNode("machine1", node401402000), makeImageNode("machine2", node25010)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 2}, {Host: "machine2", Score: 0}},
+			test:         "two images on one node, prefer this node",
+		},
+		{
+			// Pod: gcr.io/2000 gcr.io/10
+
+			// Node1
+			// Image: gcr.io/2000 2000MB
+			// Score: 2000 > max score = 10
+
+			// Node2
+			// Image: gcr.io/10 10MB
+			// Score: 10 < min score = 0
+			pod:          &v1.Pod{Spec: testMinMax},
+			nodes:        []*v1.Node{makeImageNode("machine1", node401402000), makeImageNode("machine2", node25010)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "if exceed limit, use limit",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		list, err := priorityFunction(ImageLocalityPriorityMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+
+		sort.Sort(test.expectedList)
+		sort.Sort(list)
+
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}
+
+func makeImageNode(node string, status v1.NodeStatus) *v1.Node {
+	return &v1.Node{
+		ObjectMeta: metav1.ObjectMeta{Name: node},
+		Status:     status,
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/interpod_affinity.go

@@ -0,0 +1,240 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"sync"
+
+	"k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/util/workqueue"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
+	priorityutil "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+
+	"github.com/golang/glog"
+)
+
+// InterPodAffinity contains information to calculate inter pod affinity.
+type InterPodAffinity struct {
+	info                  predicates.NodeInfo
+	nodeLister            algorithm.NodeLister
+	podLister             algorithm.PodLister
+	hardPodAffinityWeight int32
+}
+
+// NewInterPodAffinityPriority creates an InterPodAffinity.
+func NewInterPodAffinityPriority(
+	info predicates.NodeInfo,
+	nodeLister algorithm.NodeLister,
+	podLister algorithm.PodLister,
+	hardPodAffinityWeight int32) algorithm.PriorityFunction {
+	interPodAffinity := &InterPodAffinity{
+		info:                  info,
+		nodeLister:            nodeLister,
+		podLister:             podLister,
+		hardPodAffinityWeight: hardPodAffinityWeight,
+	}
+	return interPodAffinity.CalculateInterPodAffinityPriority
+}
+
+type podAffinityPriorityMap struct {
+	sync.Mutex
+
+	// nodes contain all nodes that should be considered
+	nodes []*v1.Node
+	// counts store the mapping from node name to so-far computed score of
+	// the node.
+	counts map[string]float64
+	// The first error that we faced.
+	firstError error
+}
+
+func newPodAffinityPriorityMap(nodes []*v1.Node) *podAffinityPriorityMap {
+	return &podAffinityPriorityMap{
+		nodes:  nodes,
+		counts: make(map[string]float64, len(nodes)),
+	}
+}
+
+func (p *podAffinityPriorityMap) setError(err error) {
+	p.Lock()
+	defer p.Unlock()
+	if p.firstError == nil {
+		p.firstError = err
+	}
+}
+
+func (p *podAffinityPriorityMap) processTerm(term *v1.PodAffinityTerm, podDefiningAffinityTerm, podToCheck *v1.Pod, fixedNode *v1.Node, weight float64) {
+	namespaces := priorityutil.GetNamespacesFromPodAffinityTerm(podDefiningAffinityTerm, term)
+	selector, err := metav1.LabelSelectorAsSelector(term.LabelSelector)
+	if err != nil {
+		p.setError(err)
+		return
+	}
+	match := priorityutil.PodMatchesTermsNamespaceAndSelector(podToCheck, namespaces, selector)
+	if match {
+		func() {
+			p.Lock()
+			defer p.Unlock()
+			for _, node := range p.nodes {
+				if priorityutil.NodesHaveSameTopologyKey(node, fixedNode, term.TopologyKey) {
+					p.counts[node.Name] += weight
+				}
+			}
+		}()
+	}
+}
+
+func (p *podAffinityPriorityMap) processTerms(terms []v1.WeightedPodAffinityTerm, podDefiningAffinityTerm, podToCheck *v1.Pod, fixedNode *v1.Node, multiplier int) {
+	for i := range terms {
+		term := &terms[i]
+		p.processTerm(&term.PodAffinityTerm, podDefiningAffinityTerm, podToCheck, fixedNode, float64(term.Weight*int32(multiplier)))
+	}
+}
+
+// CalculateInterPodAffinityPriority compute a sum by iterating through the elements of weightedPodAffinityTerm and adding
+// "weight" to the sum if the corresponding PodAffinityTerm is satisfied for
+// that node; the node(s) with the highest sum are the most preferred.
+// Symmetry need to be considered for preferredDuringSchedulingIgnoredDuringExecution from podAffinity & podAntiAffinity,
+// symmetry need to be considered for hard requirements from podAffinity
+func (ipa *InterPodAffinity) CalculateInterPodAffinityPriority(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
+	affinity := pod.Spec.Affinity
+	hasAffinityConstraints := affinity != nil && affinity.PodAffinity != nil
+	hasAntiAffinityConstraints := affinity != nil && affinity.PodAntiAffinity != nil
+
+	allNodeNames := make([]string, 0, len(nodeNameToInfo))
+	for name := range nodeNameToInfo {
+		allNodeNames = append(allNodeNames, name)
+	}
+
+	// convert the topology key based weights to the node name based weights
+	var maxCount float64
+	var minCount float64
+	// priorityMap stores the mapping from node name to so-far computed score of
+	// the node.
+	pm := newPodAffinityPriorityMap(nodes)
+
+	processPod := func(existingPod *v1.Pod) error {
+		existingPodNode, err := ipa.info.GetNodeInfo(existingPod.Spec.NodeName)
+		if err != nil {
+			if apierrors.IsNotFound(err) {
+				glog.Errorf("Node not found, %v", existingPod.Spec.NodeName)
+				return nil
+			}
+			return err
+		}
+		existingPodAffinity := existingPod.Spec.Affinity
+		existingHasAffinityConstraints := existingPodAffinity != nil && existingPodAffinity.PodAffinity != nil
+		existingHasAntiAffinityConstraints := existingPodAffinity != nil && existingPodAffinity.PodAntiAffinity != nil
+
+		if hasAffinityConstraints {
+			// For every soft pod affinity term of <pod>, if <existingPod> matches the term,
+			// increment <pm.counts> for every node in the cluster with the same <term.TopologyKey>
+			// value as that of <existingPods>`s node by the term`s weight.
+			terms := affinity.PodAffinity.PreferredDuringSchedulingIgnoredDuringExecution
+			pm.processTerms(terms, pod, existingPod, existingPodNode, 1)
+		}
+		if hasAntiAffinityConstraints {
+			// For every soft pod anti-affinity term of <pod>, if <existingPod> matches the term,
+			// decrement <pm.counts> for every node in the cluster with the same <term.TopologyKey>
+			// value as that of <existingPod>`s node by the term`s weight.
+			terms := affinity.PodAntiAffinity.PreferredDuringSchedulingIgnoredDuringExecution
+			pm.processTerms(terms, pod, existingPod, existingPodNode, -1)
+		}
+
+		if existingHasAffinityConstraints {
+			// For every hard pod affinity term of <existingPod>, if <pod> matches the term,
+			// increment <pm.counts> for every node in the cluster with the same <term.TopologyKey>
+			// value as that of <existingPod>'s node by the constant <ipa.hardPodAffinityWeight>
+			if ipa.hardPodAffinityWeight > 0 {
+				terms := existingPodAffinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution
+				// TODO: Uncomment this block when implement RequiredDuringSchedulingRequiredDuringExecution.
+				//if len(existingPodAffinity.PodAffinity.RequiredDuringSchedulingRequiredDuringExecution) != 0 {
+				//	terms = append(terms, existingPodAffinity.PodAffinity.RequiredDuringSchedulingRequiredDuringExecution...)
+				//}
+				for _, term := range terms {
+					pm.processTerm(&term, existingPod, pod, existingPodNode, float64(ipa.hardPodAffinityWeight))
+				}
+			}
+			// For every soft pod affinity term of <existingPod>, if <pod> matches the term,
+			// increment <pm.counts> for every node in the cluster with the same <term.TopologyKey>
+			// value as that of <existingPod>'s node by the term's weight.
+			terms := existingPodAffinity.PodAffinity.PreferredDuringSchedulingIgnoredDuringExecution
+			pm.processTerms(terms, existingPod, pod, existingPodNode, 1)
+		}
+		if existingHasAntiAffinityConstraints {
+			// For every soft pod anti-affinity term of <existingPod>, if <pod> matches the term,
+			// decrement <pm.counts> for every node in the cluster with the same <term.TopologyKey>
+			// value as that of <existingPod>'s node by the term's weight.
+			terms := existingPodAffinity.PodAntiAffinity.PreferredDuringSchedulingIgnoredDuringExecution
+			pm.processTerms(terms, existingPod, pod, existingPodNode, -1)
+		}
+		return nil
+	}
+	processNode := func(i int) {
+		nodeInfo := nodeNameToInfo[allNodeNames[i]]
+		if nodeInfo.Node() != nil {
+			if hasAffinityConstraints || hasAntiAffinityConstraints {
+				// We need to process all the nodes.
+				for _, existingPod := range nodeInfo.Pods() {
+					if err := processPod(existingPod); err != nil {
+						pm.setError(err)
+					}
+				}
+			} else {
+				// The pod doesn't have any constraints - we need to check only existing
+				// ones that have some.
+				for _, existingPod := range nodeInfo.PodsWithAffinity() {
+					if err := processPod(existingPod); err != nil {
+						pm.setError(err)
+					}
+				}
+			}
+		}
+	}
+	workqueue.Parallelize(16, len(allNodeNames), processNode)
+	if pm.firstError != nil {
+		return nil, pm.firstError
+	}
+
+	for _, node := range nodes {
+		if pm.counts[node.Name] > maxCount {
+			maxCount = pm.counts[node.Name]
+		}
+		if pm.counts[node.Name] < minCount {
+			minCount = pm.counts[node.Name]
+		}
+	}
+
+	// calculate final priority score for each node
+	result := make(schedulerapi.HostPriorityList, 0, len(nodes))
+	for _, node := range nodes {
+		fScore := float64(0)
+		if (maxCount - minCount) > 0 {
+			fScore = float64(schedulerapi.MaxPriority) * ((pm.counts[node.Name] - minCount) / (maxCount - minCount))
+		}
+		result = append(result, schedulerapi.HostPriority{Host: node.Name, Score: int(fScore)})
+		if glog.V(10) {
+			glog.Infof("%v -> %v: InterPodAffinityPriority, Score: (%d)", pod.Name, node.Name, int(fScore))
+		}
+	}
+	return result, nil
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/interpod_affinity_test.go

@@ -0,0 +1,615 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	schedulertesting "k8s.io/kubernetes/pkg/scheduler/testing"
+)
+
+type FakeNodeListInfo []*v1.Node
+
+func (nodes FakeNodeListInfo) GetNodeInfo(nodeName string) (*v1.Node, error) {
+	for _, node := range nodes {
+		if node.Name == nodeName {
+			return node, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find node: %s", nodeName)
+}
+
+func TestInterPodAffinityPriority(t *testing.T) {
+	labelRgChina := map[string]string{
+		"region": "China",
+	}
+	labelRgIndia := map[string]string{
+		"region": "India",
+	}
+	labelAzAz1 := map[string]string{
+		"az": "az1",
+	}
+	labelAzAz2 := map[string]string{
+		"az": "az2",
+	}
+	labelRgChinaAzAz1 := map[string]string{
+		"region": "China",
+		"az":     "az1",
+	}
+	podLabelSecurityS1 := map[string]string{
+		"security": "S1",
+	}
+	podLabelSecurityS2 := map[string]string{
+		"security": "S2",
+	}
+	// considered only preferredDuringSchedulingIgnoredDuringExecution in pod affinity
+	stayWithS1InRegion := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 5,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S1"},
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				},
+			},
+		},
+	}
+	stayWithS2InRegion := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 6,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S2"},
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				},
+			},
+		},
+	}
+	affinity3 := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 8,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpNotIn,
+									Values:   []string{"S1"},
+								}, {
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S2"},
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				}, {
+					Weight: 2,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpExists,
+								}, {
+									Key:      "wrongkey",
+									Operator: metav1.LabelSelectorOpDoesNotExist,
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				},
+			},
+		},
+	}
+	hardAffinity := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+				{
+					LabelSelector: &metav1.LabelSelector{
+						MatchExpressions: []metav1.LabelSelectorRequirement{
+							{
+								Key:      "security",
+								Operator: metav1.LabelSelectorOpIn,
+								Values:   []string{"S1", "value2"},
+							},
+						},
+					},
+					TopologyKey: "region",
+				}, {
+					LabelSelector: &metav1.LabelSelector{
+						MatchExpressions: []metav1.LabelSelectorRequirement{
+							{
+								Key:      "security",
+								Operator: metav1.LabelSelectorOpExists,
+							}, {
+								Key:      "wrongkey",
+								Operator: metav1.LabelSelectorOpDoesNotExist,
+							},
+						},
+					},
+					TopologyKey: "region",
+				},
+			},
+		},
+	}
+	awayFromS1InAz := &v1.Affinity{
+		PodAntiAffinity: &v1.PodAntiAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 5,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S1"},
+								},
+							},
+						},
+						TopologyKey: "az",
+					},
+				},
+			},
+		},
+	}
+	// to stay away from security S2 in any az.
+	awayFromS2InAz := &v1.Affinity{
+		PodAntiAffinity: &v1.PodAntiAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 5,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S2"},
+								},
+							},
+						},
+						TopologyKey: "az",
+					},
+				},
+			},
+		},
+	}
+	// to stay with security S1 in same region, stay away from security S2 in any az.
+	stayWithS1InRegionAwayFromS2InAz := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 8,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S1"},
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				},
+			},
+		},
+		PodAntiAffinity: &v1.PodAntiAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 5,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S2"},
+								},
+							},
+						},
+						TopologyKey: "az",
+					},
+				},
+			},
+		},
+	}
+
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test:         "all machines are same priority as Affinity is nil",
+		},
+		// the node(machine1) that have the label {"region": "China"} (match the topology key) and that have existing pods that match the labelSelector get high score
+		// the node(machine3) that don't have the label {"region": "whatever the value is"} (mismatch the topology key) but that have existing pods that match the labelSelector get low score
+		// the node(machine2) that have the label {"region": "China"} (match the topology key) but that have existing pods that mismatch the labelSelector get low score
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS1InRegion}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test: "Affinity: pod that matches topology key & pods in nodes will get high score comparing to others" +
+				"which doesn't match either pods in nodes or in topology key",
+		},
+		// the node1(machine1) that have the label {"region": "China"} (match the topology key) and that have existing pods that match the labelSelector get high score
+		// the node2(machine2) that have the label {"region": "China"}, match the topology key and have the same label value with node1, get the same high score with node1
+		// the node3(machine3) that have the label {"region": "India"}, match the topology key but have a different label value, don't have existing pods that match the labelSelector,
+		// get a low score.
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS1InRegion}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChinaAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgIndia}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: 0}},
+			test:         "All the nodes that have the same topology key & label value with one of them has an existing pod that match the affinity rules, have the same score",
+		},
+		// there are 2 regions, say regionChina(machine1,machine3,machine4) and regionIndia(machine2,machine5), both regions have nodes that match the preference.
+		// But there are more nodes(actually more existing pods) in regionChina that match the preference than regionIndia.
+		// Then, nodes in regionChina get higher score than nodes in regionIndia, and all the nodes in regionChina should get a same score(high score),
+		// while all the nodes in regionIndia should get another same score(low score).
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS2InRegion}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine4"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine5"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: labelRgIndia}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 5}, {Host: "machine3", Score: schedulerapi.MaxPriority}, {Host: "machine4", Score: schedulerapi.MaxPriority}, {Host: "machine5", Score: 5}},
+			test:         "Affinity: nodes in one region has more matching pods comparing to other reqion, so the region which has more macthes will get high score",
+		},
+		// Test with the different operators and values for pod affinity scheduling preference, including some match failures.
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: affinity3}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 2}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: 0}},
+			test:         "Affinity: different Label operators and values for pod affinity scheduling preference, including some match failures ",
+		},
+		// Test the symmetry cases for affinity, the difference between affinity and symmetry is not the pod wants to run together with some existing pods,
+		// but the existing pods have the inter pod affinity preference while the pod to schedule satisfy the preference.
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1", Affinity: stayWithS1InRegion}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2", Affinity: stayWithS2InRegion}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: 0}},
+			test:         "Affinity symmetry: considred only the preferredDuringSchedulingIgnoredDuringExecution in pod affinity symmetry",
+		},
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1", Affinity: hardAffinity}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2", Affinity: hardAffinity}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: 0}},
+			test:         "Affinity symmetry: considred RequiredDuringSchedulingIgnoredDuringExecution in pod affinity symmetry",
+		},
+
+		// The pod to schedule prefer to stay away from some existing pods at node level using the pod anti affinity.
+		// the nodes that have the label {"node": "bar"} (match the topology key) and that have existing pods that match the labelSelector get low score
+		// the nodes that don't have the label {"node": "whatever the value is"} (mismatch the topology key) but that have existing pods that match the labelSelector get high score
+		// the nodes that have the label {"node": "bar"} (match the topology key) but that have existing pods that mismatch the labelSelector get high score
+		// there are 2 nodes, say node1 and node2, both nodes have pods that match the labelSelector and have topology-key in node.Labels.
+		// But there are more pods on node1 that match the preference than node2. Then, node1 get a lower score than node2.
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: awayFromS1InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChina}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "Anti Affinity: pod that doesnot match existing pods in node will get high score ",
+		},
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: awayFromS1InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChina}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "Anti Affinity: pod that does not matches topology key & matches the pods in nodes will get higher score comparing to others ",
+		},
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: awayFromS1InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "Anti Affinity: one node has more matching pods comparing to other node, so the node which has more unmacthes will get high score",
+		},
+		// Test the symmetry cases for anti affinity
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1", Affinity: awayFromS2InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2", Affinity: awayFromS1InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz2}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "Anti Affinity symmetry: the existing pods in node which has anti affinity match will get high score",
+		},
+		// Test both  affinity and anti-affinity
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS1InRegionAwayFromS2InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz1}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "Affinity and Anti Affinity: considered only preferredDuringSchedulingIgnoredDuringExecution in both pod affinity & anti affinity",
+		},
+		// Combined cases considering both affinity and anti-affinity, the pod to schedule and existing pods have the same labels (they are in the same RC/service),
+		// the pod prefer to run together with its brother pods in the same region, but wants to stay away from them at node level,
+		// so that all the pods of a RC/service can stay in a same region but trying to separate with each other
+		// machine-1,machine-3,machine-4 are in ChinaRegion others machin-2,machine-5 are in IndiaRegion
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS1InRegionAwayFromS2InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine4"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine5"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChinaAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: labelRgIndia}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 4}, {Host: "machine3", Score: schedulerapi.MaxPriority}, {Host: "machine4", Score: schedulerapi.MaxPriority}, {Host: "machine5", Score: 4}},
+			test:         "Affinity and Anti Affinity: considering both affinity and anti-affinity, the pod to schedule and existing pods have the same labels",
+		},
+		// Consider Affinity, Anti Affinity and symmetry together.
+		// for Affinity, the weights are:                8,  0,  0,  0
+		// for Anti Affinity, the weights are:           0, -5,  0,  0
+		// for Affinity symmetry, the weights are:       0,  0,  8,  0
+		// for Anti Affinity symmetry, the weights are:  0,  0,  0, -5
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: "", Affinity: stayWithS1InRegionAwayFromS2InAz}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
+				{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
+				{Spec: v1.PodSpec{NodeName: "machine3", Affinity: stayWithS1InRegionAwayFromS2InAz}},
+				{Spec: v1.PodSpec{NodeName: "machine4", Affinity: awayFromS1InAz}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelAzAz2}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: schedulerapi.MaxPriority}, {Host: "machine4", Score: 0}},
+			test:         "Affinity and Anti Affinity and symmetry: considered only preferredDuringSchedulingIgnoredDuringExecution in both pod affinity & anti affinity & symmetry",
+		},
+	}
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		interPodAffinity := InterPodAffinity{
+			info:                  FakeNodeListInfo(test.nodes),
+			nodeLister:            schedulertesting.FakeNodeLister(test.nodes),
+			podLister:             schedulertesting.FakePodLister(test.pods),
+			hardPodAffinityWeight: v1.DefaultHardPodAffinitySymmetricWeight,
+		}
+		list, err := interPodAffinity.CalculateInterPodAffinityPriority(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: \nexpected \n\t%#v, \ngot \n\t%#v\n", test.test, test.expectedList, list)
+		}
+	}
+}
+
+func TestHardPodAffinitySymmetricWeight(t *testing.T) {
+	podLabelServiceS1 := map[string]string{
+		"service": "S1",
+	}
+	labelRgChina := map[string]string{
+		"region": "China",
+	}
+	labelRgIndia := map[string]string{
+		"region": "India",
+	}
+	labelAzAz1 := map[string]string{
+		"az": "az1",
+	}
+	hardPodAffinity := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+				{
+					LabelSelector: &metav1.LabelSelector{
+						MatchExpressions: []metav1.LabelSelectorRequirement{
+							{
+								Key:      "service",
+								Operator: metav1.LabelSelectorOpIn,
+								Values:   []string{"S1"},
+							},
+						},
+					},
+					TopologyKey: "region",
+				},
+			},
+		},
+	}
+	tests := []struct {
+		pod                   *v1.Pod
+		pods                  []*v1.Pod
+		nodes                 []*v1.Node
+		hardPodAffinityWeight int32
+		expectedList          schedulerapi.HostPriorityList
+		test                  string
+	}{
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelServiceS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1", Affinity: hardPodAffinity}},
+				{Spec: v1.PodSpec{NodeName: "machine2", Affinity: hardPodAffinity}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			hardPodAffinityWeight: v1.DefaultHardPodAffinitySymmetricWeight,
+			expectedList:          []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: 0}},
+			test:                  "Hard Pod Affinity symmetry: hard pod affinity symmetry weights 1 by default, then nodes that match the hard pod affinity symmetry rules, get a high score",
+		},
+		{
+			pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelServiceS1}},
+			pods: []*v1.Pod{
+				{Spec: v1.PodSpec{NodeName: "machine1", Affinity: hardPodAffinity}},
+				{Spec: v1.PodSpec{NodeName: "machine2", Affinity: hardPodAffinity}},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
+			},
+			hardPodAffinityWeight: 0,
+			expectedList:          []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test:                  "Hard Pod Affinity symmetry: hard pod affinity symmetry is closed(weights 0), then nodes that match the hard pod affinity symmetry rules, get same score with those not match",
+		},
+	}
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		ipa := InterPodAffinity{
+			info:                  FakeNodeListInfo(test.nodes),
+			nodeLister:            schedulertesting.FakeNodeLister(test.nodes),
+			podLister:             schedulertesting.FakePodLister(test.pods),
+			hardPodAffinityWeight: test.hardPodAffinityWeight,
+		}
+		list, err := ipa.CalculateInterPodAffinityPriority(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: \nexpected \n\t%#v, \ngot \n\t%#v\n", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/least_requested.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+var (
+	leastResourcePriority = &ResourceAllocationPriority{"LeastResourceAllocation", leastResourceScorer}
+
+	// LeastRequestedPriorityMap is a priority function that favors nodes with fewer requested resources.
+	// It calculates the percentage of memory and CPU requested by pods scheduled on the node, and
+	// prioritizes based on the minimum of the average of the fraction of requested to capacity.
+	//
+	// Details:
+	// cpu((capacity-sum(requested))*10/capacity) + memory((capacity-sum(requested))*10/capacity)/2
+	LeastRequestedPriorityMap = leastResourcePriority.PriorityMap
+)
+
+func leastResourceScorer(requested, allocable *schedulercache.Resource) int64 {
+	return (leastRequestedScore(requested.MilliCPU, allocable.MilliCPU) +
+		leastRequestedScore(requested.Memory, allocable.Memory)) / 2
+}
+
+// The unused capacity is calculated on a scale of 0-10
+// 0 being the lowest priority and 10 being the highest.
+// The more unused resources the higher the score is.
+func leastRequestedScore(requested, capacity int64) int64 {
+	if capacity == 0 {
+		return 0
+	}
+	if requested > capacity {
+		return 0
+	}
+
+	return ((capacity - requested) * int64(schedulerapi.MaxPriority)) / capacity
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/least_requested_test.go

@@ -0,0 +1,264 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestLeastRequested(t *testing.T) {
+	labels1 := map[string]string{
+		"foo": "bar",
+		"baz": "blah",
+	}
+	labels2 := map[string]string{
+		"bar": "foo",
+		"baz": "blah",
+	}
+	machine1Spec := v1.PodSpec{
+		NodeName: "machine1",
+	}
+	machine2Spec := v1.PodSpec{
+		NodeName: "machine2",
+	}
+	noResources := v1.PodSpec{
+		Containers: []v1.Container{},
+	}
+	cpuOnly := v1.PodSpec{
+		NodeName: "machine1",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+		},
+	}
+	cpuOnly2 := cpuOnly
+	cpuOnly2.NodeName = "machine2"
+	cpuAndMemory := v1.PodSpec{
+		NodeName: "machine2",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("2000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("3000"),
+					},
+				},
+			},
+		},
+	}
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			/*
+				Node1 scores (remaining resources) on 0-10 scale
+				CPU Score: ((4000 - 0) *10) / 4000 = 10
+				Memory Score: ((10000 - 0) *10) / 10000 = 10
+				Node1 Score: (10 + 10) / 2 = 10
+
+				Node2 scores (remaining resources) on 0-10 scale
+				CPU Score: ((4000 - 0) *10) / 4000 = 10
+				Memory Score: ((10000 - 0) *10) / 10000 = 10
+				Node2 Score: (10 + 10) / 2 = 10
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "nothing scheduled, nothing requested",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((4000 - 3000) *10) / 4000 = 2.5
+				Memory Score: ((10000 - 5000) *10) / 10000 = 5
+				Node1 Score: (2.5 + 5) / 2 = 3
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((6000 - 3000) *10) / 6000 = 5
+				Memory Score: ((10000 - 5000) *10) / 10000 = 5
+				Node2 Score: (5 + 5) / 2 = 5
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 6000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 3}, {Host: "machine2", Score: 5}},
+			test:         "nothing scheduled, resources requested, differently sized machines",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((4000 - 0) *10) / 4000 = 10
+				Memory Score: ((10000 - 0) *10) / 10000 = 10
+				Node1 Score: (10 + 10) / 2 = 10
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((4000 - 0) *10) / 4000 = 10
+				Memory Score: ((10000 - 0) *10) / 10000 = 10
+				Node2 Score: (10 + 10) / 2 = 10
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "no resources requested, pods scheduled",
+			pods: []*v1.Pod{
+				{Spec: machine1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: machine1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: machine2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: machine2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((20000 - 0) *10) / 20000 = 10
+				Node1 Score: (4 + 10) / 2 = 7
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((20000 - 5000) *10) / 20000 = 7.5
+				Node2 Score: (4 + 7.5) / 2 = 5
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 7}, {Host: "machine2", Score: 5}},
+			test:         "no resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuOnly2, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuAndMemory, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((20000 - 5000) *10) / 20000 = 7.5
+				Node1 Score: (4 + 7.5) / 2 = 5
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((20000 - 10000) *10) / 20000 = 5
+				Node2 Score: (4 + 5) / 2 = 4
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 5}, {Host: "machine2", Score: 4}},
+			test:         "resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((20000 - 5000) *10) / 20000 = 7.5
+				Node1 Score: (4 + 7.5) / 2 = 5
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((10000 - 6000) *10) / 10000 = 4
+				Memory Score: ((50000 - 10000) *10) / 50000 = 8
+				Node2 Score: (4 + 8) / 2 = 6
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 50000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 5}, {Host: "machine2", Score: 6}},
+			test:         "resources requested, pods scheduled with resources, differently sized machines",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: ((4000 - 6000) *10) / 4000 = 0
+				Memory Score: ((10000 - 0) *10) / 10000 = 10
+				Node1 Score: (0 + 10) / 2 = 5
+
+				Node2 scores on 0-10 scale
+				CPU Score: ((4000 - 6000) *10) / 4000 = 0
+				Memory Score: ((10000 - 5000) *10) / 10000 = 5
+				Node2 Score: (0 + 5) / 2 = 2
+			*/
+			pod:          &v1.Pod{Spec: cpuOnly},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 5}, {Host: "machine2", Score: 2}},
+			test:         "requested resources exceed node capacity",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 0, 0), makeNode("machine2", 0, 0)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "zero node resources, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		list, err := priorityFunction(LeastRequestedPriorityMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/metadata.go

@@ -0,0 +1,114 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	priorityutil "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// PriorityMetadataFactory is a factory to produce PriorityMetadata.
+type PriorityMetadataFactory struct {
+	serviceLister     algorithm.ServiceLister
+	controllerLister  algorithm.ControllerLister
+	replicaSetLister  algorithm.ReplicaSetLister
+	statefulSetLister algorithm.StatefulSetLister
+}
+
+// NewPriorityMetadataFactory creates a PriorityMetadataFactory.
+func NewPriorityMetadataFactory(serviceLister algorithm.ServiceLister, controllerLister algorithm.ControllerLister, replicaSetLister algorithm.ReplicaSetLister, statefulSetLister algorithm.StatefulSetLister) algorithm.PriorityMetadataProducer {
+	factory := &PriorityMetadataFactory{
+		serviceLister:     serviceLister,
+		controllerLister:  controllerLister,
+		replicaSetLister:  replicaSetLister,
+		statefulSetLister: statefulSetLister,
+	}
+	return factory.PriorityMetadata
+}
+
+// priorityMetadata is a type that is passed as metadata for priority functions
+type priorityMetadata struct {
+	nonZeroRequest          *schedulercache.Resource
+	podTolerations          []v1.Toleration
+	affinity                *v1.Affinity
+	podSelectors            []labels.Selector
+	controllerRef           *metav1.OwnerReference
+	podFirstServiceSelector labels.Selector
+}
+
+// PriorityMetadata is a PriorityMetadataProducer.  Node info can be nil.
+func (pmf *PriorityMetadataFactory) PriorityMetadata(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) interface{} {
+	// If we cannot compute metadata, just return nil
+	if pod == nil {
+		return nil
+	}
+	return &priorityMetadata{
+		nonZeroRequest:          getNonZeroRequests(pod),
+		podTolerations:          getAllTolerationPreferNoSchedule(pod.Spec.Tolerations),
+		affinity:                pod.Spec.Affinity,
+		podSelectors:            getSelectors(pod, pmf.serviceLister, pmf.controllerLister, pmf.replicaSetLister, pmf.statefulSetLister),
+		controllerRef:           priorityutil.GetControllerRef(pod),
+		podFirstServiceSelector: getFirstServiceSelector(pod, pmf.serviceLister),
+	}
+}
+
+// getFirstServiceSelector returns one selector of services the given pod.
+func getFirstServiceSelector(pod *v1.Pod, sl algorithm.ServiceLister) (firstServiceSelector labels.Selector) {
+	if services, err := sl.GetPodServices(pod); err == nil && len(services) > 0 {
+		return labels.SelectorFromSet(services[0].Spec.Selector)
+	}
+	return nil
+}
+
+// getSelectors returns selectors of services, RCs and RSs matching the given pod.
+func getSelectors(pod *v1.Pod, sl algorithm.ServiceLister, cl algorithm.ControllerLister, rsl algorithm.ReplicaSetLister, ssl algorithm.StatefulSetLister) []labels.Selector {
+	var selectors []labels.Selector
+
+	if services, err := sl.GetPodServices(pod); err == nil {
+		for _, service := range services {
+			selectors = append(selectors, labels.SelectorFromSet(service.Spec.Selector))
+		}
+	}
+
+	if rcs, err := cl.GetPodControllers(pod); err == nil {
+		for _, rc := range rcs {
+			selectors = append(selectors, labels.SelectorFromSet(rc.Spec.Selector))
+		}
+	}
+
+	if rss, err := rsl.GetPodReplicaSets(pod); err == nil {
+		for _, rs := range rss {
+			if selector, err := metav1.LabelSelectorAsSelector(rs.Spec.Selector); err == nil {
+				selectors = append(selectors, selector)
+			}
+		}
+	}
+
+	if sss, err := ssl.GetPodStatefulSets(pod); err == nil {
+		for _, ss := range sss {
+			if selector, err := metav1.LabelSelectorAsSelector(ss.Spec.Selector); err == nil {
+				selectors = append(selectors, selector)
+			}
+		}
+	}
+
+	return selectors
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/metadata_test.go

@@ -0,0 +1,167 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	apps "k8s.io/api/apps/v1beta1"
+	"k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	priorityutil "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	schedulertesting "k8s.io/kubernetes/pkg/scheduler/testing"
+)
+
+func TestPriorityMetadata(t *testing.T) {
+	nonZeroReqs := &schedulercache.Resource{}
+	nonZeroReqs.MilliCPU = priorityutil.DefaultMilliCPURequest
+	nonZeroReqs.Memory = priorityutil.DefaultMemoryRequest
+
+	specifiedReqs := &schedulercache.Resource{}
+	specifiedReqs.MilliCPU = 200
+	specifiedReqs.Memory = 2000
+
+	tolerations := []v1.Toleration{{
+		Key:      "foo",
+		Operator: v1.TolerationOpEqual,
+		Value:    "bar",
+		Effect:   v1.TaintEffectPreferNoSchedule,
+	}}
+	podAffinity := &v1.Affinity{
+		PodAffinity: &v1.PodAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{
+				{
+					Weight: 5,
+					PodAffinityTerm: v1.PodAffinityTerm{
+						LabelSelector: &metav1.LabelSelector{
+							MatchExpressions: []metav1.LabelSelectorRequirement{
+								{
+									Key:      "security",
+									Operator: metav1.LabelSelectorOpIn,
+									Values:   []string{"S1"},
+								},
+							},
+						},
+						TopologyKey: "region",
+					},
+				},
+			},
+		},
+	}
+	podWithTolerationsAndAffinity := &v1.Pod{
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Name:            "container",
+					Image:           "image",
+					ImagePullPolicy: "Always",
+				},
+			},
+			Affinity:    podAffinity,
+			Tolerations: tolerations,
+		},
+	}
+	podWithTolerationsAndRequests := &v1.Pod{
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Name:            "container",
+					Image:           "image",
+					ImagePullPolicy: "Always",
+					Resources: v1.ResourceRequirements{
+						Requests: v1.ResourceList{
+							v1.ResourceCPU:    resource.MustParse("200m"),
+							v1.ResourceMemory: resource.MustParse("2000"),
+						},
+					},
+				},
+			},
+			Tolerations: tolerations,
+		},
+	}
+	podWithAffinityAndRequests := &v1.Pod{
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Name:            "container",
+					Image:           "image",
+					ImagePullPolicy: "Always",
+					Resources: v1.ResourceRequirements{
+						Requests: v1.ResourceList{
+							v1.ResourceCPU:    resource.MustParse("200m"),
+							v1.ResourceMemory: resource.MustParse("2000"),
+						},
+					},
+				},
+			},
+			Affinity: podAffinity,
+		},
+	}
+	tests := []struct {
+		pod      *v1.Pod
+		test     string
+		expected interface{}
+	}{
+		{
+			pod:      nil,
+			expected: nil,
+			test:     "pod is nil , priorityMetadata is nil",
+		},
+		{
+			pod: podWithTolerationsAndAffinity,
+			expected: &priorityMetadata{
+				nonZeroRequest: nonZeroReqs,
+				podTolerations: tolerations,
+				affinity:       podAffinity,
+			},
+			test: "Produce a priorityMetadata with default requests",
+		},
+		{
+			pod: podWithTolerationsAndRequests,
+			expected: &priorityMetadata{
+				nonZeroRequest: specifiedReqs,
+				podTolerations: tolerations,
+				affinity:       nil,
+			},
+			test: "Produce a priorityMetadata with specified requests",
+		},
+		{
+			pod: podWithAffinityAndRequests,
+			expected: &priorityMetadata{
+				nonZeroRequest: specifiedReqs,
+				podTolerations: nil,
+				affinity:       podAffinity,
+			},
+			test: "Produce a priorityMetadata with specified requests",
+		},
+	}
+	mataDataProducer := NewPriorityMetadataFactory(
+		schedulertesting.FakeServiceLister([]*v1.Service{}),
+		schedulertesting.FakeControllerLister([]*v1.ReplicationController{}),
+		schedulertesting.FakeReplicaSetLister([]*extensions.ReplicaSet{}),
+		schedulertesting.FakeStatefulSetLister([]*apps.StatefulSet{}))
+	for _, test := range tests {
+		ptData := mataDataProducer(test.pod, nil)
+		if !reflect.DeepEqual(test.expected, ptData) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expected, ptData)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/most_requested.go

@@ -0,0 +1,55 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+var (
+	mostResourcePriority = &ResourceAllocationPriority{"MostResourceAllocation", mostResourceScorer}
+
+	// MostRequestedPriorityMap is a priority function that favors nodes with most requested resources.
+	// It calculates the percentage of memory and CPU requested by pods scheduled on the node, and prioritizes
+	// based on the maximum of the average of the fraction of requested to capacity.
+	// Details: (cpu(10 * sum(requested) / capacity) + memory(10 * sum(requested) / capacity)) / 2
+	MostRequestedPriorityMap = mostResourcePriority.PriorityMap
+)
+
+func mostResourceScorer(requested, allocable *schedulercache.Resource) int64 {
+	return (mostRequestedScore(requested.MilliCPU, allocable.MilliCPU) +
+		mostRequestedScore(requested.Memory, allocable.Memory)) / 2
+}
+
+// The used capacity is calculated on a scale of 0-10
+// 0 being the lowest priority and 10 being the highest.
+// The more resources are used the higher the score is. This function
+// is almost a reversed version of least_requested_priority.calculatUnusedScore
+// (10 - calculateUnusedScore). The main difference is in rounding. It was added to
+// keep the final formula clean and not to modify the widely used (by users
+// in their default scheduling policies) calculateUSedScore.
+func mostRequestedScore(requested, capacity int64) int64 {
+	if capacity == 0 {
+		return 0
+	}
+	if requested > capacity {
+		return 0
+	}
+
+	return (requested * schedulerapi.MaxPriority) / capacity
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/most_requested_test.go

@@ -0,0 +1,221 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestMostRequested(t *testing.T) {
+	labels1 := map[string]string{
+		"foo": "bar",
+		"baz": "blah",
+	}
+	labels2 := map[string]string{
+		"bar": "foo",
+		"baz": "blah",
+	}
+	noResources := v1.PodSpec{
+		Containers: []v1.Container{},
+	}
+	cpuOnly := v1.PodSpec{
+		NodeName: "machine1",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+		},
+	}
+	cpuOnly2 := cpuOnly
+	cpuOnly2.NodeName = "machine2"
+	cpuAndMemory := v1.PodSpec{
+		NodeName: "machine2",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("2000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("3000"),
+					},
+				},
+			},
+		},
+	}
+	bigCPUAndMemory := v1.PodSpec{
+		NodeName: "machine1",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("4000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Requests: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("3000m"),
+						v1.ResourceMemory: resource.MustParse("5000"),
+					},
+				},
+			},
+		},
+	}
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			/*
+				Node1 scores (used resources) on 0-10 scale
+				CPU Score: (0 * 10  / 4000 = 0
+				Memory Score: (0 * 10) / 10000 = 0
+				Node1 Score: (0 + 0) / 2 = 0
+
+				Node2 scores (used resources) on 0-10 scale
+				CPU Score: (0 * 10 / 4000 = 0
+				Memory Score: (0 * 10 / 10000 = 0
+				Node2 Score: (0 + 0) / 2 = 0
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "nothing scheduled, nothing requested",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: (3000 * 10 / 4000 = 7.5
+				Memory Score: (5000 * 10) / 10000 = 5
+				Node1 Score: (7.5 + 5) / 2 = 6
+
+				Node2 scores on 0-10 scale
+				CPU Score: (3000 * 10 / 6000 = 5
+				Memory Score: (5000 * 10 / 10000 = 5
+				Node2 Score: (5 + 5) / 2 = 5
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 6000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 6}, {Host: "machine2", Score: 5}},
+			test:         "nothing scheduled, resources requested, differently sized machines",
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: (6000 * 10) / 10000 = 6
+				Memory Score: (0 * 10) / 20000 = 10
+				Node1 Score: (6 + 0) / 2 = 3
+
+				Node2 scores on 0-10 scale
+				CPU Score: (6000 * 10) / 10000 = 6
+				Memory Score: (5000 * 10) / 20000 = 2.5
+				Node2 Score: (6 + 2.5) / 2 = 4
+			*/
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 3}, {Host: "machine2", Score: 4}},
+			test:         "no resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: cpuOnly, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuOnly2, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: cpuAndMemory, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: (6000 * 10) / 10000 = 6
+				Memory Score: (5000 * 10) / 20000 = 2.5
+				Node1 Score: (6 + 2.5) / 2 = 4
+
+				Node2 scores on 0-10 scale
+				CPU Score: (6000 * 10) / 10000 = 6
+				Memory Score: (10000 * 10) / 20000 = 5
+				Node2 Score: (6 + 5) / 2 = 5
+			*/
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 4}, {Host: "machine2", Score: 5}},
+			test:         "resources requested, pods scheduled with resources",
+			pods: []*v1.Pod{
+				{Spec: cpuOnly},
+				{Spec: cpuAndMemory},
+			},
+		},
+		{
+			/*
+				Node1 scores on 0-10 scale
+				CPU Score: 5000 > 4000 return 0
+				Memory Score: (9000 * 10) / 10000 = 9
+				Node1 Score: (0 + 9) / 2 = 4
+
+				Node2 scores on 0-10 scale
+				CPU Score: (5000 * 10) / 10000 = 5
+				Memory Score: 9000 > 8000 return 0
+				Node2 Score: (5 + 0) / 2 = 2
+			*/
+			pod:          &v1.Pod{Spec: bigCPUAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 10000, 8000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 4}, {Host: "machine2", Score: 2}},
+			test:         "resources requested with more than the node, pods scheduled with resources",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
+		list, err := priorityFunction(MostRequestedPriorityMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_affinity.go

@@ -0,0 +1,78 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// CalculateNodeAffinityPriorityMap prioritizes nodes according to node affinity scheduling preferences
+// indicated in PreferredDuringSchedulingIgnoredDuringExecution. Each time a node match a preferredSchedulingTerm,
+// it will a get an add of preferredSchedulingTerm.Weight. Thus, the more preferredSchedulingTerms
+// the node satisfies and the more the preferredSchedulingTerm that is satisfied weights, the higher
+// score the node gets.
+func CalculateNodeAffinityPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+
+	var affinity *v1.Affinity
+	if priorityMeta, ok := meta.(*priorityMetadata); ok {
+		affinity = priorityMeta.affinity
+	} else {
+		// We couldn't parse metadata - fallback to the podspec.
+		affinity = pod.Spec.Affinity
+	}
+
+	var count int32
+	// A nil element of PreferredDuringSchedulingIgnoredDuringExecution matches no objects.
+	// An element of PreferredDuringSchedulingIgnoredDuringExecution that refers to an
+	// empty PreferredSchedulingTerm matches all objects.
+	if affinity != nil && affinity.NodeAffinity != nil && affinity.NodeAffinity.PreferredDuringSchedulingIgnoredDuringExecution != nil {
+		// Match PreferredDuringSchedulingIgnoredDuringExecution term by term.
+		for i := range affinity.NodeAffinity.PreferredDuringSchedulingIgnoredDuringExecution {
+			preferredSchedulingTerm := &affinity.NodeAffinity.PreferredDuringSchedulingIgnoredDuringExecution[i]
+			if preferredSchedulingTerm.Weight == 0 {
+				continue
+			}
+
+			// TODO: Avoid computing it for all nodes if this becomes a performance problem.
+			nodeSelector, err := v1helper.NodeSelectorRequirementsAsSelector(preferredSchedulingTerm.Preference.MatchExpressions)
+			if err != nil {
+				return schedulerapi.HostPriority{}, err
+			}
+			if nodeSelector.Matches(labels.Set(node.Labels)) {
+				count += preferredSchedulingTerm.Weight
+			}
+		}
+	}
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: int(count),
+	}, nil
+}
+
+// CalculateNodeAffinityPriorityReduce is a reduce function for node affinity priority calculation.
+var CalculateNodeAffinityPriorityReduce = NormalizeReduce(schedulerapi.MaxPriority, false)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_affinity_test.go

@@ -0,0 +1,179 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestNodeAffinityPriority(t *testing.T) {
+	label1 := map[string]string{"foo": "bar"}
+	label2 := map[string]string{"key": "value"}
+	label3 := map[string]string{"az": "az1"}
+	label4 := map[string]string{"abc": "az11", "def": "az22"}
+	label5 := map[string]string{"foo": "bar", "key": "value", "az": "az1"}
+
+	affinity1 := &v1.Affinity{
+		NodeAffinity: &v1.NodeAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.PreferredSchedulingTerm{{
+				Weight: 2,
+				Preference: v1.NodeSelectorTerm{
+					MatchExpressions: []v1.NodeSelectorRequirement{{
+						Key:      "foo",
+						Operator: v1.NodeSelectorOpIn,
+						Values:   []string{"bar"},
+					}},
+				},
+			}},
+		},
+	}
+
+	affinity2 := &v1.Affinity{
+		NodeAffinity: &v1.NodeAffinity{
+			PreferredDuringSchedulingIgnoredDuringExecution: []v1.PreferredSchedulingTerm{
+				{
+					Weight: 2,
+					Preference: v1.NodeSelectorTerm{
+						MatchExpressions: []v1.NodeSelectorRequirement{
+							{
+								Key:      "foo",
+								Operator: v1.NodeSelectorOpIn,
+								Values:   []string{"bar"},
+							},
+						},
+					},
+				},
+				{
+					Weight: 4,
+					Preference: v1.NodeSelectorTerm{
+						MatchExpressions: []v1.NodeSelectorRequirement{
+							{
+								Key:      "key",
+								Operator: v1.NodeSelectorOpIn,
+								Values:   []string{"value"},
+							},
+						},
+					},
+				},
+				{
+					Weight: 5,
+					Preference: v1.NodeSelectorTerm{
+						MatchExpressions: []v1.NodeSelectorRequirement{
+							{
+								Key:      "foo",
+								Operator: v1.NodeSelectorOpIn,
+								Values:   []string{"bar"},
+							},
+							{
+								Key:      "key",
+								Operator: v1.NodeSelectorOpIn,
+								Values:   []string{"value"},
+							},
+							{
+								Key:      "az",
+								Operator: v1.NodeSelectorOpIn,
+								Values:   []string{"az1"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tests := []struct {
+		pod          *v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Annotations: map[string]string{},
+				},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test:         "all machines are same priority as NodeAffinity is nil",
+		},
+		{
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{
+					Affinity: affinity1,
+				},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label4}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test:         "no machine macthes preferred scheduling requirements in NodeAffinity of pod so all machines' priority is zero",
+		},
+		{
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{
+					Affinity: affinity1,
+				},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			test:         "only machine1 matches the preferred scheduling requirements of pod",
+		},
+		{
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{
+					Affinity: affinity2,
+				},
+			},
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: label5}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 1}, {Host: "machine5", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 3}},
+			test:         "all machines matches the preferred scheduling requirements of pod but with different priorities ",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
+		nap := priorityFunction(CalculateNodeAffinityPriorityMap, CalculateNodeAffinityPriorityReduce, nil)
+		list, err := nap(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: \nexpected %#v, \ngot      %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_label.go

@@ -0,0 +1,62 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// NodeLabelPrioritizer contains information to calculate node label priority.
+type NodeLabelPrioritizer struct {
+	label    string
+	presence bool
+}
+
+// NewNodeLabelPriority creates a NodeLabelPrioritizer.
+func NewNodeLabelPriority(label string, presence bool) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
+	labelPrioritizer := &NodeLabelPrioritizer{
+		label:    label,
+		presence: presence,
+	}
+	return labelPrioritizer.CalculateNodeLabelPriorityMap, nil
+}
+
+// CalculateNodeLabelPriorityMap checks whether a particular label exists on a node or not, regardless of its value.
+// If presence is true, prioritizes nodes that have the specified label, regardless of value.
+// If presence is false, prioritizes nodes that do not have the specified label.
+func (n *NodeLabelPrioritizer) CalculateNodeLabelPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+
+	exists := labels.Set(node.Labels).Has(n.label)
+	score := 0
+	if (exists && n.presence) || (!exists && !n.presence) {
+		score = schedulerapi.MaxPriority
+	}
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: score,
+	}, nil
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_label_test.go

@@ -0,0 +1,126 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestNewNodeLabelPriority(t *testing.T) {
+	label1 := map[string]string{"foo": "bar"}
+	label2 := map[string]string{"bar": "foo"}
+	label3 := map[string]string{"bar": "baz"}
+	tests := []struct {
+		nodes        []*v1.Node
+		label        string
+		presence     bool
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			label:        "baz",
+			presence:     true,
+			test:         "no match found, presence true",
+		},
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			label:        "baz",
+			presence:     false,
+			test:         "no match found, presence false",
+		},
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			label:        "foo",
+			presence:     true,
+			test:         "one match found, presence true",
+		},
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			label:        "foo",
+			presence:     false,
+			test:         "one match found, presence false",
+		},
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			label:        "bar",
+			presence:     true,
+			test:         "two matches found, presence true",
+		},
+		{
+			nodes: []*v1.Node{
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
+			},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
+			label:        "bar",
+			presence:     false,
+			test:         "two matches found, presence false",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
+		labelPrioritizer := &NodeLabelPrioritizer{
+			label:    test.label,
+			presence: test.presence,
+		}
+		list, err := priorityFunction(labelPrioritizer.CalculateNodeLabelPriorityMap, nil, nil)(nil, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		// sort the two lists to avoid failures on account of different ordering
+		sort.Sort(test.expectedList)
+		sort.Sort(list)
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_prefer_avoid_pods.go

@@ -0,0 +1,68 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
+	priorityutil "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// CalculateNodePreferAvoidPodsPriorityMap priorities nodes according to the node annotation
+// "scheduler.alpha.kubernetes.io/preferAvoidPods".
+func CalculateNodePreferAvoidPodsPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+	var controllerRef *metav1.OwnerReference
+	if priorityMeta, ok := meta.(*priorityMetadata); ok {
+		controllerRef = priorityMeta.controllerRef
+	} else {
+		// We couldn't parse metadata - fallback to the podspec.
+		controllerRef = priorityutil.GetControllerRef(pod)
+	}
+
+	if controllerRef != nil {
+		// Ignore pods that are owned by other controller than ReplicationController
+		// or ReplicaSet.
+		if controllerRef.Kind != "ReplicationController" && controllerRef.Kind != "ReplicaSet" {
+			controllerRef = nil
+		}
+	}
+	if controllerRef == nil {
+		return schedulerapi.HostPriority{Host: node.Name, Score: schedulerapi.MaxPriority}, nil
+	}
+
+	avoids, err := v1helper.GetAvoidPodsFromNodeAnnotations(node.Annotations)
+	if err != nil {
+		// If we cannot get annotation, assume it's schedulable there.
+		return schedulerapi.HostPriority{Host: node.Name, Score: schedulerapi.MaxPriority}, nil
+	}
+	for i := range avoids.PreferAvoidPods {
+		avoid := &avoids.PreferAvoidPods[i]
+		if avoid.PodSignature.PodController.Kind == controllerRef.Kind && avoid.PodSignature.PodController.UID == controllerRef.UID {
+			return schedulerapi.HostPriority{Host: node.Name, Score: 0}, nil
+		}
+	}
+	return schedulerapi.HostPriority{Host: node.Name, Score: schedulerapi.MaxPriority}, nil
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/node_prefer_avoid_pods_test.go

@@ -0,0 +1,156 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestNodePreferAvoidPriority(t *testing.T) {
+	annotations1 := map[string]string{
+		v1.PreferAvoidPodsAnnotationKey: `
+							{
+							    "preferAvoidPods": [
+							        {
+							            "podSignature": {
+							                "podController": {
+							                    "apiVersion": "v1",
+							                    "kind": "ReplicationController",
+							                    "name": "foo",
+							                    "uid": "abcdef123456",
+							                    "controller": true
+							                }
+							            },
+							            "reason": "some reason",
+							            "message": "some message"
+							        }
+							    ]
+							}`,
+	}
+	annotations2 := map[string]string{
+		v1.PreferAvoidPodsAnnotationKey: `
+							{
+							    "preferAvoidPods": [
+							        {
+							            "podSignature": {
+							                "podController": {
+							                    "apiVersion": "v1",
+							                    "kind": "ReplicaSet",
+							                    "name": "foo",
+							                    "uid": "qwert12345",
+							                    "controller": true
+							                }
+							            },
+							            "reason": "some reason",
+							            "message": "some message"
+							        }
+							    ]
+							}`,
+	}
+	testNodes := []*v1.Node{
+		{
+			ObjectMeta: metav1.ObjectMeta{Name: "machine1", Annotations: annotations1},
+		},
+		{
+			ObjectMeta: metav1.ObjectMeta{Name: "machine2", Annotations: annotations2},
+		},
+		{
+			ObjectMeta: metav1.ObjectMeta{Name: "machine3"},
+		},
+	}
+	trueVar := true
+	tests := []struct {
+		pod          *v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: "default",
+					OwnerReferences: []metav1.OwnerReference{
+						{Kind: "ReplicationController", Name: "foo", UID: "abcdef123456", Controller: &trueVar},
+					},
+				},
+			},
+			nodes:        testNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			test:         "pod managed by ReplicationController should avoid a node, this node get lowest priority score",
+		},
+		{
+			pod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: "default",
+					OwnerReferences: []metav1.OwnerReference{
+						{Kind: "RandomController", Name: "foo", UID: "abcdef123456", Controller: &trueVar},
+					},
+				},
+			},
+			nodes:        testNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			test:         "ownership by random controller should be ignored",
+		},
+		{
+			pod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: "default",
+					OwnerReferences: []metav1.OwnerReference{
+						{Kind: "ReplicationController", Name: "foo", UID: "abcdef123456"},
+					},
+				},
+			},
+			nodes:        testNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			test:         "owner without Controller field set should be ignored",
+		},
+		{
+			pod: &v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: "default",
+					OwnerReferences: []metav1.OwnerReference{
+						{Kind: "ReplicaSet", Name: "foo", UID: "qwert12345", Controller: &trueVar},
+					},
+				},
+			},
+			nodes:        testNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: schedulerapi.MaxPriority}},
+			test:         "pod managed by ReplicaSet should avoid a node, this node get lowest priority score",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
+		list, err := priorityFunction(CalculateNodePreferAvoidPodsPriorityMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		// sort the two lists to avoid failures on account of different ordering
+		sort.Sort(test.expectedList)
+		sort.Sort(list)
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/reduce.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// NormalizeReduce generates a PriorityReduceFunction that can normalize the result
+// scores to [0, maxPriority]. If reverse is set to true, it reverses the scores by
+// subtracting it from maxPriority.
+func NormalizeReduce(maxPriority int, reverse bool) algorithm.PriorityReduceFunction {
+	return func(
+		_ *v1.Pod,
+		_ interface{},
+		_ map[string]*schedulercache.NodeInfo,
+		result schedulerapi.HostPriorityList) error {
+
+		var maxCount int
+		for i := range result {
+			if result[i].Score > maxCount {
+				maxCount = result[i].Score
+			}
+		}
+
+		if maxCount == 0 {
+			if reverse {
+				for i := range result {
+					result[i].Score = maxPriority
+				}
+			}
+			return nil
+		}
+
+		for i := range result {
+			score := result[i].Score
+
+			score = maxPriority * score / maxCount
+			if reverse {
+				score = maxPriority - score
+			}
+
+			result[i].Score = score
+		}
+		return nil
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/resource_allocation.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	priorityutil "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// ResourceAllocationPriority contains information to calculate resource allocation priority.
+type ResourceAllocationPriority struct {
+	Name   string
+	scorer func(requested, allocable *schedulercache.Resource) int64
+}
+
+// PriorityMap priorities nodes according to the resource allocations on the node.
+// It will use `scorer` function to calculate the score.
+func (r *ResourceAllocationPriority) PriorityMap(
+	pod *v1.Pod,
+	meta interface{},
+	nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+	allocatable := nodeInfo.AllocatableResource()
+
+	var requested schedulercache.Resource
+	if priorityMeta, ok := meta.(*priorityMetadata); ok {
+		requested = *priorityMeta.nonZeroRequest
+	} else {
+		// We couldn't parse metadata - fallback to computing it.
+		requested = *getNonZeroRequests(pod)
+	}
+
+	requested.MilliCPU += nodeInfo.NonZeroRequest().MilliCPU
+	requested.Memory += nodeInfo.NonZeroRequest().Memory
+
+	score := r.scorer(&requested, &allocatable)
+
+	if glog.V(10) {
+		glog.Infof(
+			"%v -> %v: %v, capacity %d millicores %d memory bytes, total request %d millicores %d memory bytes, score %d",
+			pod.Name, node.Name, r.Name,
+			allocatable.MilliCPU, allocatable.Memory,
+			requested.MilliCPU+allocatable.MilliCPU, requested.Memory+allocatable.Memory,
+			score,
+		)
+	}
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: int(score),
+	}, nil
+}
+
+func getNonZeroRequests(pod *v1.Pod) *schedulercache.Resource {
+	result := &schedulercache.Resource{}
+	for i := range pod.Spec.Containers {
+		container := &pod.Spec.Containers[i]
+		cpu, memory := priorityutil.GetNonzeroRequests(&container.Resources.Requests)
+		result.MilliCPU += cpu
+		result.Memory += memory
+	}
+	return result
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/resource_limits.go

@@ -0,0 +1,128 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+
+	"github.com/golang/glog"
+)
+
+// ResourceLimitsPriorityMap is a priority function that increases score of input node by 1 if the node satisfies
+// input pod's resource limits. In detail, this priority function works as follows: If a node does not publish its
+// allocatable resources (cpu and memory both), the node score is not affected. If a pod does not specify
+// its cpu and memory limits both, the node score is not affected. If one or both of cpu and memory limits
+// of the pod are satisfied, the node is assigned a score of 1.
+// Rationale of choosing the lowest score of 1 is that this is mainly selected to break ties between nodes that have
+// same scores assigned by one of least and most requested priority functions.
+func ResourceLimitsPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+
+	allocatableResources := nodeInfo.AllocatableResource()
+
+	// compute pod limits
+	podLimits := getResourceLimits(pod)
+
+	cpuScore := computeScore(podLimits.MilliCPU, allocatableResources.MilliCPU)
+	memScore := computeScore(podLimits.Memory, allocatableResources.Memory)
+
+	score := int(0)
+	if cpuScore == 1 || memScore == 1 {
+		score = 1
+	}
+
+	if glog.V(10) {
+		// We explicitly don't do glog.V(10).Infof() to avoid computing all the parameters if this is
+		// not logged. There is visible performance gain from it.
+		glog.Infof(
+			"%v -> %v: Resource Limits Priority, allocatable %d millicores %d memory bytes, pod limits %d millicores %d memory bytes, score %d",
+			pod.Name, node.Name,
+			allocatableResources.MilliCPU, allocatableResources.Memory,
+			podLimits.MilliCPU, podLimits.Memory,
+			score,
+		)
+	}
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: score,
+	}, nil
+}
+
+// computeScore return 1 if limit value is less than or equal to allocable
+// value, otherwise it returns 0.
+func computeScore(limit, allocatable int64) int64 {
+	if limit != 0 && allocatable != 0 && limit <= allocatable {
+		return 1
+	}
+	return 0
+}
+
+// getResourceLimits computes resource limits for input pod.
+// The reason to create this new function is to be consistent with other
+// priority functions because most or perhaps all priority functions work
+// with schedulercache.Resource.
+// TODO: cache it as part of metadata passed to priority functions.
+func getResourceLimits(pod *v1.Pod) *schedulercache.Resource {
+	result := &schedulercache.Resource{}
+	for _, container := range pod.Spec.Containers {
+		result.Add(container.Resources.Limits)
+	}
+
+	// take max_resource(sum_pod, any_init_container)
+	for _, container := range pod.Spec.InitContainers {
+		for rName, rQuantity := range container.Resources.Limits {
+			switch rName {
+			case v1.ResourceMemory:
+				if mem := rQuantity.Value(); mem > result.Memory {
+					result.Memory = mem
+				}
+			case v1.ResourceCPU:
+				if cpu := rQuantity.MilliValue(); cpu > result.MilliCPU {
+					result.MilliCPU = cpu
+				}
+				// keeping these resources though score computation in other priority functions and in this
+				// are only computed based on cpu and memory only.
+			case v1.ResourceEphemeralStorage:
+				if ephemeralStorage := rQuantity.Value(); ephemeralStorage > result.EphemeralStorage {
+					result.EphemeralStorage = ephemeralStorage
+				}
+			case v1.ResourceNvidiaGPU:
+				if gpu := rQuantity.Value(); gpu > result.NvidiaGPU {
+					result.NvidiaGPU = gpu
+				}
+			default:
+				if v1helper.IsScalarResourceName(rName) {
+					value := rQuantity.Value()
+					if value > result.ScalarResources[rName] {
+						result.SetScalar(rName, value)
+					}
+				}
+			}
+		}
+	}
+
+	return result
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/resource_limits_test.go

@@ -0,0 +1,151 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	//metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func TestResourceLimistPriority(t *testing.T) {
+	noResources := v1.PodSpec{
+		Containers: []v1.Container{},
+	}
+
+	cpuOnly := v1.PodSpec{
+		NodeName: "machine1",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("0"),
+					},
+				},
+			},
+		},
+	}
+
+	memOnly := v1.PodSpec{
+		NodeName: "machine2",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("0"),
+						v1.ResourceMemory: resource.MustParse("2000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("0"),
+						v1.ResourceMemory: resource.MustParse("3000"),
+					},
+				},
+			},
+		},
+	}
+
+	cpuAndMemory := v1.PodSpec{
+		NodeName: "machine2",
+		Containers: []v1.Container{
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("1000m"),
+						v1.ResourceMemory: resource.MustParse("2000"),
+					},
+				},
+			},
+			{
+				Resources: v1.ResourceRequirements{
+					Limits: v1.ResourceList{
+						v1.ResourceCPU:    resource.MustParse("2000m"),
+						v1.ResourceMemory: resource.MustParse("3000"),
+					},
+				},
+			},
+		},
+	}
+
+	tests := []struct {
+		// input pod
+		pod          *v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod:          &v1.Pod{Spec: noResources},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 0), makeNode("machine3", 0, 10000), makeNode("machine4", 0, 0)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}, {Host: "machine4", Score: 0}},
+			test:         "pod does not specify its resource limits",
+		},
+		{
+			pod:          &v1.Pod{Spec: cpuOnly},
+			nodes:        []*v1.Node{makeNode("machine1", 3000, 10000), makeNode("machine2", 2000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 1}, {Host: "machine2", Score: 0}},
+			test:         "pod only specifies  cpu limits",
+		},
+		{
+			pod:          &v1.Pod{Spec: memOnly},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 4000), makeNode("machine2", 5000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 1}},
+			test:         "pod only specifies  mem limits",
+		},
+		{
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 4000, 4000), makeNode("machine2", 5000, 10000)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 1}, {Host: "machine2", Score: 1}},
+			test:         "pod specifies both cpu and  mem limits",
+		},
+		{
+			pod:          &v1.Pod{Spec: cpuAndMemory},
+			nodes:        []*v1.Node{makeNode("machine1", 0, 0)},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}},
+			test:         "node does not advertise its allocatables",
+		},
+	}
+
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
+		list, err := priorityFunction(ResourceLimitsPriorityMap, nil, nil)(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/selector_spreading.go

@@ -0,0 +1,283 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	utilnode "k8s.io/kubernetes/pkg/util/node"
+
+	"github.com/golang/glog"
+)
+
+// When zone information is present, give 2/3 of the weighting to zone spreading, 1/3 to node spreading
+// TODO: Any way to justify this weighting?
+const zoneWeighting float64 = 2.0 / 3.0
+
+// SelectorSpread contains information to calculate selector spread priority.
+type SelectorSpread struct {
+	serviceLister     algorithm.ServiceLister
+	controllerLister  algorithm.ControllerLister
+	replicaSetLister  algorithm.ReplicaSetLister
+	statefulSetLister algorithm.StatefulSetLister
+}
+
+// NewSelectorSpreadPriority creates a SelectorSpread.
+func NewSelectorSpreadPriority(
+	serviceLister algorithm.ServiceLister,
+	controllerLister algorithm.ControllerLister,
+	replicaSetLister algorithm.ReplicaSetLister,
+	statefulSetLister algorithm.StatefulSetLister) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
+	selectorSpread := &SelectorSpread{
+		serviceLister:     serviceLister,
+		controllerLister:  controllerLister,
+		replicaSetLister:  replicaSetLister,
+		statefulSetLister: statefulSetLister,
+	}
+	return selectorSpread.CalculateSpreadPriorityMap, selectorSpread.CalculateSpreadPriorityReduce
+}
+
+// CalculateSpreadPriorityMap spreads pods across hosts, considering pods
+// belonging to the same service,RC,RS or StatefulSet.
+// When a pod is scheduled, it looks for services, RCs,RSs and StatefulSets that match the pod,
+// then finds existing pods that match those selectors.
+// It favors nodes that have fewer existing matching pods.
+// i.e. it pushes the scheduler towards a node where there's the smallest number of
+// pods which match the same service, RC,RSs or StatefulSets selectors as the pod being scheduled.
+func (s *SelectorSpread) CalculateSpreadPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	var selectors []labels.Selector
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+
+	priorityMeta, ok := meta.(*priorityMetadata)
+	if ok {
+		selectors = priorityMeta.podSelectors
+	} else {
+		selectors = getSelectors(pod, s.serviceLister, s.controllerLister, s.replicaSetLister, s.statefulSetLister)
+	}
+
+	if len(selectors) == 0 {
+		return schedulerapi.HostPriority{
+			Host:  node.Name,
+			Score: int(0),
+		}, nil
+	}
+
+	count := int(0)
+	for _, nodePod := range nodeInfo.Pods() {
+		if pod.Namespace != nodePod.Namespace {
+			continue
+		}
+		// When we are replacing a failed pod, we often see the previous
+		// deleted version while scheduling the replacement.
+		// Ignore the previous deleted version for spreading purposes
+		// (it can still be considered for resource restrictions etc.)
+		if nodePod.DeletionTimestamp != nil {
+			glog.V(4).Infof("skipping pending-deleted pod: %s/%s", nodePod.Namespace, nodePod.Name)
+			continue
+		}
+		matches := false
+		for _, selector := range selectors {
+			if selector.Matches(labels.Set(nodePod.ObjectMeta.Labels)) {
+				matches = true
+				break
+			}
+		}
+		if matches {
+			count++
+		}
+	}
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: int(count),
+	}, nil
+}
+
+// CalculateSpreadPriorityReduce calculates the source of each node
+// based on the number of existing matching pods on the node
+// where zone information is included on the nodes, it favors nodes
+// in zones with fewer existing matching pods.
+func (s *SelectorSpread) CalculateSpreadPriorityReduce(pod *v1.Pod, meta interface{}, nodeNameToInfo map[string]*schedulercache.NodeInfo, result schedulerapi.HostPriorityList) error {
+	countsByZone := make(map[string]int, 10)
+	maxCountByZone := int(0)
+	maxCountByNodeName := int(0)
+
+	for i := range result {
+		if result[i].Score > maxCountByNodeName {
+			maxCountByNodeName = result[i].Score
+		}
+		zoneID := utilnode.GetZoneKey(nodeNameToInfo[result[i].Host].Node())
+		if zoneID == "" {
+			continue
+		}
+		countsByZone[zoneID] += result[i].Score
+	}
+
+	for zoneID := range countsByZone {
+		if countsByZone[zoneID] > maxCountByZone {
+			maxCountByZone = countsByZone[zoneID]
+		}
+	}
+
+	haveZones := len(countsByZone) != 0
+
+	maxCountByNodeNameFloat64 := float64(maxCountByNodeName)
+	maxCountByZoneFloat64 := float64(maxCountByZone)
+	MaxPriorityFloat64 := float64(schedulerapi.MaxPriority)
+
+	for i := range result {
+		// initializing to the default/max node score of maxPriority
+		fScore := MaxPriorityFloat64
+		if maxCountByNodeName > 0 {
+			fScore = MaxPriorityFloat64 * (float64(maxCountByNodeName-result[i].Score) / maxCountByNodeNameFloat64)
+		}
+		// If there is zone information present, incorporate it
+		if haveZones {
+			zoneID := utilnode.GetZoneKey(nodeNameToInfo[result[i].Host].Node())
+			if zoneID != "" {
+				zoneScore := MaxPriorityFloat64
+				if maxCountByZone > 0 {
+					zoneScore = MaxPriorityFloat64 * (float64(maxCountByZone-countsByZone[zoneID]) / maxCountByZoneFloat64)
+				}
+				fScore = (fScore * (1.0 - zoneWeighting)) + (zoneWeighting * zoneScore)
+			}
+		}
+		result[i].Score = int(fScore)
+		if glog.V(10) {
+			glog.Infof(
+				"%v -> %v: SelectorSpreadPriority, Score: (%d)", pod.Name, result[i].Host, int(fScore),
+			)
+		}
+	}
+	return nil
+}
+
+// ServiceAntiAffinity contains information to calculate service anti-affinity priority.
+type ServiceAntiAffinity struct {
+	podLister     algorithm.PodLister
+	serviceLister algorithm.ServiceLister
+	label         string
+}
+
+// NewServiceAntiAffinityPriority creates a ServiceAntiAffinity.
+func NewServiceAntiAffinityPriority(podLister algorithm.PodLister, serviceLister algorithm.ServiceLister, label string) (algorithm.PriorityMapFunction, algorithm.PriorityReduceFunction) {
+	antiAffinity := &ServiceAntiAffinity{
+		podLister:     podLister,
+		serviceLister: serviceLister,
+		label:         label,
+	}
+	return antiAffinity.CalculateAntiAffinityPriorityMap, antiAffinity.CalculateAntiAffinityPriorityReduce
+}
+
+// Classifies nodes into ones with labels and without labels.
+func (s *ServiceAntiAffinity) getNodeClassificationByLabels(nodes []*v1.Node) (map[string]string, []string) {
+	labeledNodes := map[string]string{}
+	nonLabeledNodes := []string{}
+	for _, node := range nodes {
+		if labels.Set(node.Labels).Has(s.label) {
+			label := labels.Set(node.Labels).Get(s.label)
+			labeledNodes[node.Name] = label
+		} else {
+			nonLabeledNodes = append(nonLabeledNodes, node.Name)
+		}
+	}
+	return labeledNodes, nonLabeledNodes
+}
+
+// filteredPod get pods based on namespace and selector
+func filteredPod(namespace string, selector labels.Selector, nodeInfo *schedulercache.NodeInfo) (pods []*v1.Pod) {
+	if nodeInfo.Pods() == nil || len(nodeInfo.Pods()) == 0 || selector == nil {
+		return []*v1.Pod{}
+	}
+	for _, pod := range nodeInfo.Pods() {
+		if namespace == pod.Namespace && selector.Matches(labels.Set(pod.Labels)) {
+			pods = append(pods, pod)
+		}
+	}
+	return
+}
+
+// CalculateAntiAffinityPriorityMap spreads pods by minimizing the number of pods belonging to the same service
+// on given machine
+func (s *ServiceAntiAffinity) CalculateAntiAffinityPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	var firstServiceSelector labels.Selector
+
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+	priorityMeta, ok := meta.(*priorityMetadata)
+	if ok {
+		firstServiceSelector = priorityMeta.podFirstServiceSelector
+	} else {
+		firstServiceSelector = getFirstServiceSelector(pod, s.serviceLister)
+	}
+	//pods matched namespace,selector on current node
+	matchedPodsOfNode := filteredPod(pod.Namespace, firstServiceSelector, nodeInfo)
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: int(len(matchedPodsOfNode)),
+	}, nil
+}
+
+// CalculateAntiAffinityPriorityReduce computes each node score with the same value for a particular label.
+// The label to be considered is provided to the struct (ServiceAntiAffinity).
+func (s *ServiceAntiAffinity) CalculateAntiAffinityPriorityReduce(pod *v1.Pod, meta interface{}, nodeNameToInfo map[string]*schedulercache.NodeInfo, result schedulerapi.HostPriorityList) error {
+	var numServicePods int
+	var label string
+	podCounts := map[string]int{}
+	labelNodesStatus := map[string]string{}
+	maxPriorityFloat64 := float64(schedulerapi.MaxPriority)
+
+	for _, hostPriority := range result {
+		numServicePods += hostPriority.Score
+		if !labels.Set(nodeNameToInfo[hostPriority.Host].Node().Labels).Has(s.label) {
+			continue
+		}
+		label = labels.Set(nodeNameToInfo[hostPriority.Host].Node().Labels).Get(s.label)
+		labelNodesStatus[hostPriority.Host] = label
+		podCounts[label] += hostPriority.Score
+	}
+
+	//score int - scale of 0-maxPriority
+	// 0 being the lowest priority and maxPriority being the highest
+	for i, hostPriority := range result {
+		label, ok := labelNodesStatus[hostPriority.Host]
+		if !ok {
+			result[i].Host = hostPriority.Host
+			result[i].Score = int(0)
+			continue
+		}
+		// initializing to the default/max node score of maxPriority
+		fScore := maxPriorityFloat64
+		if numServicePods > 0 {
+			fScore = maxPriorityFloat64 * (float64(numServicePods-podCounts[label]) / float64(numServicePods))
+		}
+		result[i].Host = hostPriority.Host
+		result[i].Score = int(fScore)
+	}
+
+	return nil
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/selector_spreading_test.go

@@ -0,0 +1,828 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	apps "k8s.io/api/apps/v1beta1"
+	"k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+	schedulertesting "k8s.io/kubernetes/pkg/scheduler/testing"
+)
+
+func controllerRef(kind, name, uid string) []metav1.OwnerReference {
+	// TODO: When ControllerRef will be implemented uncomment code below.
+	return nil
+	//trueVar := true
+	//return []metav1.OwnerReference{
+	//	{Kind: kind, Name: name, UID: types.UID(uid), Controller: &trueVar},
+	//}
+}
+
+func TestSelectorSpreadPriority(t *testing.T) {
+	labels1 := map[string]string{
+		"foo": "bar",
+		"baz": "blah",
+	}
+	labels2 := map[string]string{
+		"bar": "foo",
+		"baz": "blah",
+	}
+	zone1Spec := v1.PodSpec{
+		NodeName: "machine1",
+	}
+	zone2Spec := v1.PodSpec{
+		NodeName: "machine2",
+	}
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []string
+		rcs          []*v1.ReplicationController
+		rss          []*extensions.ReplicaSet
+		services     []*v1.Service
+		sss          []*apps.StatefulSet
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod:          new(v1.Pod),
+			nodes:        []string{"machine1", "machine2"},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "nothing scheduled",
+		},
+		{
+			pod:          &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods:         []*v1.Pod{{Spec: zone1Spec}},
+			nodes:        []string{"machine1", "machine2"},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "no services",
+		},
+		{
+			pod:          &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods:         []*v1.Pod{{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}}},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"key": "value"}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: schedulerapi.MaxPriority}},
+			test:         "different services",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "two pods, one service pod",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "five pods, one service pod in no namespace",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}, ObjectMeta: metav1.ObjectMeta{Namespace: metav1.NamespaceDefault}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "four pods, one service pod in default namespace",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns2"}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}, ObjectMeta: metav1.ObjectMeta{Namespace: "ns1"}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: schedulerapi.MaxPriority}, {Host: "machine2", Score: 0}},
+			test:         "five pods, one service pod in specific namespace",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "three pods, two service pods on different machines",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 5}, {Host: "machine2", Score: 0}},
+			test:         "four pods, three service pods",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "service with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			},
+			nodes:    []string{"machine1", "machine2"},
+			rcs:      []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
+			// "baz=blah" matches both labels1 and labels2, and "foo=bar" matches only labels 1. This means that we assume that we want to
+			// do spreading between all pods. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "service with partial pod label matches with service and replication controller",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			},
+			nodes:    []string{"machine1", "machine2"},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
+			rss:      []*extensions.ReplicaSet{{Spec: extensions.ReplicaSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			// We use ReplicaSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "service with partial pod label matches with service and replica set",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
+			sss:          []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "service with partial pod label matches with service and replica set",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: map[string]string{"foo": "bar", "bar": "foo"}, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			},
+			nodes:    []string{"machine1", "machine2"},
+			rcs:      []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"bar": "foo"}}}},
+			// Taken together Service and Replication Controller should match all Pods, hence result should be equal to one above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "disjoined service and replication controller should be treated equally",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: map[string]string{"foo": "bar", "bar": "foo"}, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			},
+			nodes:    []string{"machine1", "machine2"},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"bar": "foo"}}}},
+			rss:      []*extensions.ReplicaSet{{Spec: extensions.ReplicaSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			// We use ReplicaSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "disjoined service and replica set should be treated equally",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: map[string]string{"foo": "bar", "bar": "foo"}, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			services:     []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"bar": "foo"}}}},
+			sss:          []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "disjoined service and replica set should be treated equally",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			},
+			nodes: []string{"machine1", "machine2"},
+			rcs:   []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			// Both Nodes have one pod from the given RC, hence both get 0 score.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "Replication controller with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			},
+			nodes: []string{"machine1", "machine2"},
+			rss:   []*extensions.ReplicaSet{{Spec: extensions.ReplicaSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			// We use ReplicaSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "Replica set with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			},
+			nodes: []string{"machine1", "machine2"},
+			sss:   []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}},
+			// We use StatefulSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
+			test:         "StatefulSet with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
+			},
+			nodes:        []string{"machine1", "machine2"},
+			rcs:          []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: map[string]string{"baz": "blah"}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "Another replication controller with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicaSet", "name", "abc123")}},
+			},
+			nodes: []string{"machine1", "machine2"},
+			rss:   []*extensions.ReplicaSet{{Spec: extensions.ReplicaSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"baz": "blah"}}}}},
+			// We use ReplicaSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "Another replication set with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
+			},
+			nodes: []string{"machine1", "machine2"},
+			sss:   []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"baz": "blah"}}}}},
+			// We use StatefulSet, instead of ReplicationController. The result should be exactly as above.
+			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
+			test:         "Another stateful set with partial pod label matches",
+		},
+	}
+
+	for i, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, makeNodeList(test.nodes))
+		selectorSpread := SelectorSpread{
+			serviceLister:     schedulertesting.FakeServiceLister(test.services),
+			controllerLister:  schedulertesting.FakeControllerLister(test.rcs),
+			replicaSetLister:  schedulertesting.FakeReplicaSetLister(test.rss),
+			statefulSetLister: schedulertesting.FakeStatefulSetLister(test.sss),
+		}
+
+		mataDataProducer := NewPriorityMetadataFactory(
+			schedulertesting.FakeServiceLister(test.services),
+			schedulertesting.FakeControllerLister(test.rcs),
+			schedulertesting.FakeReplicaSetLister(test.rss),
+			schedulertesting.FakeStatefulSetLister(test.sss))
+		mataData := mataDataProducer(test.pod, nodeNameToInfo)
+
+		ttp := priorityFunction(selectorSpread.CalculateSpreadPriorityMap, selectorSpread.CalculateSpreadPriorityReduce, mataData)
+		list, err := ttp(test.pod, nodeNameToInfo, makeNodeList(test.nodes))
+		if err != nil {
+			t.Errorf("unexpected error: %v index : %d\n", err, i)
+		}
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}
+
+func buildPod(nodeName string, labels map[string]string, ownerRefs []metav1.OwnerReference) *v1.Pod {
+	return &v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{Labels: labels, OwnerReferences: ownerRefs},
+		Spec:       v1.PodSpec{NodeName: nodeName},
+	}
+}
+
+func TestZoneSelectorSpreadPriority(t *testing.T) {
+	labels1 := map[string]string{
+		"label1": "l1",
+		"baz":    "blah",
+	}
+	labels2 := map[string]string{
+		"label2": "l2",
+		"baz":    "blah",
+	}
+
+	const nodeMachine1Zone1 = "machine1.zone1"
+	const nodeMachine1Zone2 = "machine1.zone2"
+	const nodeMachine2Zone2 = "machine2.zone2"
+	const nodeMachine1Zone3 = "machine1.zone3"
+	const nodeMachine2Zone3 = "machine2.zone3"
+	const nodeMachine3Zone3 = "machine3.zone3"
+
+	buildNodeLabels := func(failureDomain string) map[string]string {
+		labels := map[string]string{
+			kubeletapis.LabelZoneFailureDomain: failureDomain,
+		}
+		return labels
+	}
+	labeledNodes := map[string]map[string]string{
+		nodeMachine1Zone1: buildNodeLabels("zone1"),
+		nodeMachine1Zone2: buildNodeLabels("zone2"),
+		nodeMachine2Zone2: buildNodeLabels("zone2"),
+		nodeMachine1Zone3: buildNodeLabels("zone3"),
+		nodeMachine2Zone3: buildNodeLabels("zone3"),
+		nodeMachine3Zone3: buildNodeLabels("zone3"),
+	}
+
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        []string
+		rcs          []*v1.ReplicationController
+		rss          []*extensions.ReplicaSet
+		services     []*v1.Service
+		sss          []*apps.StatefulSet
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod: new(v1.Pod),
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
+			},
+			test: "nothing scheduled",
+		},
+		{
+			pod:  buildPod("", labels1, nil),
+			pods: []*v1.Pod{buildPod(nodeMachine1Zone1, nil, nil)},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
+			},
+			test: "no services",
+		},
+		{
+			pod:      buildPod("", labels1, nil),
+			pods:     []*v1.Pod{buildPod(nodeMachine1Zone1, labels2, nil)},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"key": "value"}}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
+			},
+			test: "different services",
+		},
+		{
+			pod: buildPod("", labels1, nil),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone1, labels2, nil),
+				buildPod(nodeMachine1Zone2, labels2, nil),
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone2, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
+			},
+			test: "two pods, 0 matching",
+		},
+		{
+			pod: buildPod("", labels1, nil),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone1, labels2, nil),
+				buildPod(nodeMachine1Zone2, labels1, nil),
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: 0}, // Already have pod on machine
+				{Host: nodeMachine2Zone2, Score: 3}, // Already have pod in zone
+				{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
+			},
+			test: "two pods, 1 matching (in z2)",
+		},
+		{
+			pod: buildPod("", labels1, nil),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone1, labels2, nil),
+				buildPod(nodeMachine1Zone2, labels1, nil),
+				buildPod(nodeMachine2Zone2, labels1, nil),
+				buildPod(nodeMachine1Zone3, labels2, nil),
+				buildPod(nodeMachine2Zone3, labels1, nil),
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
+				{Host: nodeMachine1Zone2, Score: 0}, // Pod on node
+				{Host: nodeMachine2Zone2, Score: 0}, // Pod on node
+				{Host: nodeMachine1Zone3, Score: 6}, // Pod in zone
+				{Host: nodeMachine2Zone3, Score: 3}, // Pod on node
+				{Host: nodeMachine3Zone3, Score: 6}, // Pod in zone
+			},
+			test: "five pods, 3 matching (z2=2, z3=1)",
+		},
+		{
+			pod: buildPod("", labels1, nil),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone1, labels1, nil),
+				buildPod(nodeMachine1Zone2, labels1, nil),
+				buildPod(nodeMachine2Zone2, labels2, nil),
+				buildPod(nodeMachine1Zone3, labels1, nil),
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: 0}, // Pod on node
+				{Host: nodeMachine1Zone2, Score: 0}, // Pod on node
+				{Host: nodeMachine2Zone2, Score: 3}, // Pod in zone
+				{Host: nodeMachine1Zone3, Score: 0}, // Pod on node
+				{Host: nodeMachine2Zone3, Score: 3}, // Pod in zone
+				{Host: nodeMachine3Zone3, Score: 3}, // Pod in zone
+			},
+			test: "four pods, 3 matching (z1=1, z2=1, z3=1)",
+		},
+		{
+			pod: buildPod("", labels1, nil),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone1, labels1, nil),
+				buildPod(nodeMachine1Zone2, labels1, nil),
+				buildPod(nodeMachine1Zone3, labels1, nil),
+				buildPod(nodeMachine2Zone2, labels2, nil),
+			},
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: nodeMachine1Zone1, Score: 0}, // Pod on node
+				{Host: nodeMachine1Zone2, Score: 0}, // Pod on node
+				{Host: nodeMachine2Zone2, Score: 3}, // Pod in zone
+				{Host: nodeMachine1Zone3, Score: 0}, // Pod on node
+				{Host: nodeMachine2Zone3, Score: 3}, // Pod in zone
+				{Host: nodeMachine3Zone3, Score: 3}, // Pod in zone
+			},
+			test: "four pods, 3 matching (z1=1, z2=1, z3=1)",
+		},
+		{
+			pod: buildPod("", labels1, controllerRef("ReplicationController", "name", "abc123")),
+			pods: []*v1.Pod{
+				buildPod(nodeMachine1Zone3, labels1, controllerRef("ReplicationController", "name", "abc123")),
+				buildPod(nodeMachine1Zone2, labels1, controllerRef("ReplicationController", "name", "abc123")),
+				buildPod(nodeMachine1Zone3, labels1, controllerRef("ReplicationController", "name", "abc123")),
+			},
+			rcs: []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{
+				// Note that because we put two pods on the same node (nodeMachine1Zone3),
+				// the values here are questionable for zone2, in particular for nodeMachine1Zone2.
+				// However they kind of make sense; zone1 is still most-highly favored.
+				// zone3 is in general least favored, and m1.z3 particularly low priority.
+				// We would probably prefer to see a bigger gap between putting a second
+				// pod on m1.z2 and putting a pod on m2.z2, but the ordering is correct.
+				// This is also consistent with what we have already.
+				{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority}, // No pods in zone
+				{Host: nodeMachine1Zone2, Score: 5},                        // Pod on node
+				{Host: nodeMachine2Zone2, Score: 6},                        // Pod in zone
+				{Host: nodeMachine1Zone3, Score: 0},                        // Two pods on node
+				{Host: nodeMachine2Zone3, Score: 3},                        // Pod in zone
+				{Host: nodeMachine3Zone3, Score: 3},                        // Pod in zone
+			},
+			test: "Replication controller spreading (z1=0, z2=1, z3=2)",
+		},
+	}
+
+	for i, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, makeLabeledNodeList(labeledNodes))
+		selectorSpread := SelectorSpread{
+			serviceLister:     schedulertesting.FakeServiceLister(test.services),
+			controllerLister:  schedulertesting.FakeControllerLister(test.rcs),
+			replicaSetLister:  schedulertesting.FakeReplicaSetLister(test.rss),
+			statefulSetLister: schedulertesting.FakeStatefulSetLister(test.sss),
+		}
+
+		mataDataProducer := NewPriorityMetadataFactory(
+			schedulertesting.FakeServiceLister(test.services),
+			schedulertesting.FakeControllerLister(test.rcs),
+			schedulertesting.FakeReplicaSetLister(test.rss),
+			schedulertesting.FakeStatefulSetLister(test.sss))
+		mataData := mataDataProducer(test.pod, nodeNameToInfo)
+		ttp := priorityFunction(selectorSpread.CalculateSpreadPriorityMap, selectorSpread.CalculateSpreadPriorityReduce, mataData)
+		list, err := ttp(test.pod, nodeNameToInfo, makeLabeledNodeList(labeledNodes))
+		if err != nil {
+			t.Errorf("unexpected error: %v index : %d", err, i)
+		}
+		// sort the two lists to avoid failures on account of different ordering
+		sort.Sort(test.expectedList)
+		sort.Sort(list)
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
+		}
+	}
+}
+
+func TestZoneSpreadPriority(t *testing.T) {
+	labels1 := map[string]string{
+		"foo": "bar",
+		"baz": "blah",
+	}
+	labels2 := map[string]string{
+		"bar": "foo",
+		"baz": "blah",
+	}
+	zone1 := map[string]string{
+		"zone": "zone1",
+	}
+	zone2 := map[string]string{
+		"zone": "zone2",
+	}
+	nozone := map[string]string{
+		"name": "value",
+	}
+	zone0Spec := v1.PodSpec{
+		NodeName: "machine01",
+	}
+	zone1Spec := v1.PodSpec{
+		NodeName: "machine11",
+	}
+	zone2Spec := v1.PodSpec{
+		NodeName: "machine21",
+	}
+	labeledNodes := map[string]map[string]string{
+		"machine01": nozone, "machine02": nozone,
+		"machine11": zone1, "machine12": zone1,
+		"machine21": zone2, "machine22": zone2,
+	}
+	tests := []struct {
+		pod          *v1.Pod
+		pods         []*v1.Pod
+		nodes        map[string]map[string]string
+		services     []*v1.Service
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		{
+			pod:   new(v1.Pod),
+			nodes: labeledNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: schedulerapi.MaxPriority}, {Host: "machine12", Score: schedulerapi.MaxPriority},
+				{Host: "machine21", Score: schedulerapi.MaxPriority}, {Host: "machine22", Score: schedulerapi.MaxPriority},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "nothing scheduled",
+		},
+		{
+			pod:   &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods:  []*v1.Pod{{Spec: zone1Spec}},
+			nodes: labeledNodes,
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: schedulerapi.MaxPriority}, {Host: "machine12", Score: schedulerapi.MaxPriority},
+				{Host: "machine21", Score: schedulerapi.MaxPriority}, {Host: "machine22", Score: schedulerapi.MaxPriority},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "no services",
+		},
+		{
+			pod:      &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods:     []*v1.Pod{{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}}},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"key": "value"}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: schedulerapi.MaxPriority}, {Host: "machine12", Score: schedulerapi.MaxPriority},
+				{Host: "machine21", Score: schedulerapi.MaxPriority}, {Host: "machine22", Score: schedulerapi.MaxPriority},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "different services",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone0Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: schedulerapi.MaxPriority}, {Host: "machine12", Score: schedulerapi.MaxPriority},
+				{Host: "machine21", Score: 0}, {Host: "machine22", Score: 0},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "three pods, one service pod",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: 5}, {Host: "machine12", Score: 5},
+				{Host: "machine21", Score: 5}, {Host: "machine22", Score: 5},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "three pods, two service pods on different machines",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: metav1.NamespaceDefault}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}, ObjectMeta: metav1.ObjectMeta{Namespace: metav1.NamespaceDefault}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: 0}, {Host: "machine12", Score: 0},
+				{Host: "machine21", Score: schedulerapi.MaxPriority}, {Host: "machine22", Score: schedulerapi.MaxPriority},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "three service label match pods in different namespaces",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: 6}, {Host: "machine12", Score: 6},
+				{Host: "machine21", Score: 3}, {Host: "machine22", Score: 3},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "four pods, three service pods",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: 3}, {Host: "machine12", Score: 3},
+				{Host: "machine21", Score: 6}, {Host: "machine22", Score: 6},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "service with partial pod label matches",
+		},
+		{
+			pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			pods: []*v1.Pod{
+				{Spec: zone0Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+				{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1}},
+			},
+			nodes:    labeledNodes,
+			services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
+			expectedList: []schedulerapi.HostPriority{{Host: "machine11", Score: 7}, {Host: "machine12", Score: 7},
+				{Host: "machine21", Score: 5}, {Host: "machine22", Score: 5},
+				{Host: "machine01", Score: 0}, {Host: "machine02", Score: 0}},
+			test: "service pod on non-zoned node",
+		},
+	}
+	// these local variables just make sure controllerLister\replicaSetLister\statefulSetLister not nil
+	// when construct mataDataProducer
+	sss := []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}}
+	rcs := []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}}
+	rss := []*extensions.ReplicaSet{{Spec: extensions.ReplicaSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}}}}}
+
+	for i, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, makeLabeledNodeList(test.nodes))
+		zoneSpread := ServiceAntiAffinity{podLister: schedulertesting.FakePodLister(test.pods), serviceLister: schedulertesting.FakeServiceLister(test.services), label: "zone"}
+
+		mataDataProducer := NewPriorityMetadataFactory(
+			schedulertesting.FakeServiceLister(test.services),
+			schedulertesting.FakeControllerLister(rcs),
+			schedulertesting.FakeReplicaSetLister(rss),
+			schedulertesting.FakeStatefulSetLister(sss))
+		mataData := mataDataProducer(test.pod, nodeNameToInfo)
+		ttp := priorityFunction(zoneSpread.CalculateAntiAffinityPriorityMap, zoneSpread.CalculateAntiAffinityPriorityReduce, mataData)
+		list, err := ttp(test.pod, nodeNameToInfo, makeLabeledNodeList(test.nodes))
+		if err != nil {
+			t.Errorf("unexpected error: %v index : %d", err, i)
+		}
+
+		// sort the two lists to avoid failures on account of different ordering
+		sort.Sort(test.expectedList)
+		sort.Sort(list)
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("test index %d (%s): expected %#v, got %#v", i, test.test, test.expectedList, list)
+		}
+	}
+}
+
+func TestGetNodeClassificationByLabels(t *testing.T) {
+	const machine01 = "machine01"
+	const machine02 = "machine02"
+	const zoneA = "zoneA"
+	zone1 := map[string]string{
+		"zone": zoneA,
+	}
+	labeledNodes := map[string]map[string]string{
+		machine01: zone1,
+	}
+	expectedNonLabeledNodes := []string{machine02}
+	serviceAffinity := ServiceAntiAffinity{label: "zone"}
+	newLabeledNodes, noNonLabeledNodes := serviceAffinity.getNodeClassificationByLabels(makeLabeledNodeList(labeledNodes))
+	noLabeledNodes, newnonLabeledNodes := serviceAffinity.getNodeClassificationByLabels(makeNodeList(expectedNonLabeledNodes))
+	label, _ := newLabeledNodes[machine01]
+	if label != zoneA && len(noNonLabeledNodes) != 0 {
+		t.Errorf("Expected only labeled node with label zoneA and no noNonLabeledNodes")
+	}
+	if len(noLabeledNodes) != 0 && newnonLabeledNodes[0] != machine02 {
+		t.Errorf("Expected only non labelled nodes")
+	}
+}
+
+func makeLabeledNodeList(nodeMap map[string]map[string]string) []*v1.Node {
+	nodes := make([]*v1.Node, 0, len(nodeMap))
+	for nodeName, labels := range nodeMap {
+		nodes = append(nodes, &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: nodeName, Labels: labels}})
+	}
+	return nodes
+}
+
+func makeNodeList(nodeNames []string) []*v1.Node {
+	nodes := make([]*v1.Node, 0, len(nodeNames))
+	for _, nodeName := range nodeNames {
+		nodes = append(nodes, &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: nodeName}})
+	}
+	return nodes
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/taint_toleration.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// CountIntolerableTaintsPreferNoSchedule gives the count of intolerable taints of a pod with effect PreferNoSchedule
+func countIntolerableTaintsPreferNoSchedule(taints []v1.Taint, tolerations []v1.Toleration) (intolerableTaints int) {
+	for _, taint := range taints {
+		// check only on taints that have effect PreferNoSchedule
+		if taint.Effect != v1.TaintEffectPreferNoSchedule {
+			continue
+		}
+
+		if !v1helper.TolerationsTolerateTaint(tolerations, &taint) {
+			intolerableTaints++
+		}
+	}
+	return
+}
+
+// getAllTolerationEffectPreferNoSchedule gets the list of all Tolerations with Effect PreferNoSchedule or with no effect.
+func getAllTolerationPreferNoSchedule(tolerations []v1.Toleration) (tolerationList []v1.Toleration) {
+	for _, toleration := range tolerations {
+		// Empty effect means all effects which includes PreferNoSchedule, so we need to collect it as well.
+		if len(toleration.Effect) == 0 || toleration.Effect == v1.TaintEffectPreferNoSchedule {
+			tolerationList = append(tolerationList, toleration)
+		}
+	}
+	return
+}
+
+// ComputeTaintTolerationPriorityMap prepares the priority list for all the nodes based on the number of intolerable taints on the node
+func ComputeTaintTolerationPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
+	node := nodeInfo.Node()
+	if node == nil {
+		return schedulerapi.HostPriority{}, fmt.Errorf("node not found")
+	}
+	// To hold all the tolerations with Effect PreferNoSchedule
+	var tolerationsPreferNoSchedule []v1.Toleration
+	if priorityMeta, ok := meta.(*priorityMetadata); ok {
+		tolerationsPreferNoSchedule = priorityMeta.podTolerations
+
+	} else {
+		tolerationsPreferNoSchedule = getAllTolerationPreferNoSchedule(pod.Spec.Tolerations)
+	}
+
+	return schedulerapi.HostPriority{
+		Host:  node.Name,
+		Score: countIntolerableTaintsPreferNoSchedule(node.Spec.Taints, tolerationsPreferNoSchedule),
+	}, nil
+}
+
+// ComputeTaintTolerationPriorityReduce calculates the source of each node based on the number of intolerable taints on the node
+var ComputeTaintTolerationPriorityReduce = NormalizeReduce(schedulerapi.MaxPriority, true)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/taint_toleration_test.go

@@ -0,0 +1,241 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func nodeWithTaints(nodeName string, taints []v1.Taint) *v1.Node {
+	return &v1.Node{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: nodeName,
+		},
+		Spec: v1.NodeSpec{
+			Taints: taints,
+		},
+	}
+}
+
+func podWithTolerations(tolerations []v1.Toleration) *v1.Pod {
+	return &v1.Pod{
+		Spec: v1.PodSpec{
+			Tolerations: tolerations,
+		},
+	}
+}
+
+// This function will create a set of nodes and pods and test the priority
+// Nodes with zero,one,two,three,four and hundred taints are created
+// Pods with zero,one,two,three,four and hundred tolerations are created
+
+func TestTaintAndToleration(t *testing.T) {
+	tests := []struct {
+		pod          *v1.Pod
+		nodes        []*v1.Node
+		expectedList schedulerapi.HostPriorityList
+		test         string
+	}{
+		// basic test case
+		{
+			test: "node with taints tolerated by the pod, gets a higher score than those node with intolerable taints",
+			pod: podWithTolerations([]v1.Toleration{{
+				Key:      "foo",
+				Operator: v1.TolerationOpEqual,
+				Value:    "bar",
+				Effect:   v1.TaintEffectPreferNoSchedule,
+			}}),
+			nodes: []*v1.Node{
+				nodeWithTaints("nodeA", []v1.Taint{{
+					Key:    "foo",
+					Value:  "bar",
+					Effect: v1.TaintEffectPreferNoSchedule,
+				}}),
+				nodeWithTaints("nodeB", []v1.Taint{{
+					Key:    "foo",
+					Value:  "blah",
+					Effect: v1.TaintEffectPreferNoSchedule,
+				}}),
+			},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: "nodeA", Score: schedulerapi.MaxPriority},
+				{Host: "nodeB", Score: 0},
+			},
+		},
+		// the count of taints that are tolerated by pod, does not matter.
+		{
+			test: "the nodes that all of their taints are tolerated by the pod, get the same score, no matter how many tolerable taints a node has",
+			pod: podWithTolerations([]v1.Toleration{
+				{
+					Key:      "cpu-type",
+					Operator: v1.TolerationOpEqual,
+					Value:    "arm64",
+					Effect:   v1.TaintEffectPreferNoSchedule,
+				}, {
+					Key:      "disk-type",
+					Operator: v1.TolerationOpEqual,
+					Value:    "ssd",
+					Effect:   v1.TaintEffectPreferNoSchedule,
+				},
+			}),
+			nodes: []*v1.Node{
+				nodeWithTaints("nodeA", []v1.Taint{}),
+				nodeWithTaints("nodeB", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+				nodeWithTaints("nodeC", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					}, {
+						Key:    "disk-type",
+						Value:  "ssd",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+			},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: "nodeA", Score: schedulerapi.MaxPriority},
+				{Host: "nodeB", Score: schedulerapi.MaxPriority},
+				{Host: "nodeC", Score: schedulerapi.MaxPriority},
+			},
+		},
+		// the count of taints on a node that are not tolerated by pod, matters.
+		{
+			test: "the more intolerable taints a node has, the lower score it gets.",
+			pod: podWithTolerations([]v1.Toleration{{
+				Key:      "foo",
+				Operator: v1.TolerationOpEqual,
+				Value:    "bar",
+				Effect:   v1.TaintEffectPreferNoSchedule,
+			}}),
+			nodes: []*v1.Node{
+				nodeWithTaints("nodeA", []v1.Taint{}),
+				nodeWithTaints("nodeB", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+				nodeWithTaints("nodeC", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					}, {
+						Key:    "disk-type",
+						Value:  "ssd",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+			},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: "nodeA", Score: schedulerapi.MaxPriority},
+				{Host: "nodeB", Score: 5},
+				{Host: "nodeC", Score: 0},
+			},
+		},
+		// taints-tolerations priority only takes care about the taints and tolerations that have effect PreferNoSchedule
+		{
+			test: "only taints and tolerations that have effect PreferNoSchedule are checked by taints-tolerations priority function",
+			pod: podWithTolerations([]v1.Toleration{
+				{
+					Key:      "cpu-type",
+					Operator: v1.TolerationOpEqual,
+					Value:    "arm64",
+					Effect:   v1.TaintEffectNoSchedule,
+				}, {
+					Key:      "disk-type",
+					Operator: v1.TolerationOpEqual,
+					Value:    "ssd",
+					Effect:   v1.TaintEffectNoSchedule,
+				},
+			}),
+			nodes: []*v1.Node{
+				nodeWithTaints("nodeA", []v1.Taint{}),
+				nodeWithTaints("nodeB", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectNoSchedule,
+					},
+				}),
+				nodeWithTaints("nodeC", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					}, {
+						Key:    "disk-type",
+						Value:  "ssd",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+			},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: "nodeA", Score: schedulerapi.MaxPriority},
+				{Host: "nodeB", Score: schedulerapi.MaxPriority},
+				{Host: "nodeC", Score: 0},
+			},
+		},
+		{
+			test: "Default behaviour No taints and tolerations, lands on node with no taints",
+			//pod without tolerations
+			pod: podWithTolerations([]v1.Toleration{}),
+			nodes: []*v1.Node{
+				//Node without taints
+				nodeWithTaints("nodeA", []v1.Taint{}),
+				nodeWithTaints("nodeB", []v1.Taint{
+					{
+						Key:    "cpu-type",
+						Value:  "arm64",
+						Effect: v1.TaintEffectPreferNoSchedule,
+					},
+				}),
+			},
+			expectedList: []schedulerapi.HostPriority{
+				{Host: "nodeA", Score: schedulerapi.MaxPriority},
+				{Host: "nodeB", Score: 0},
+			},
+		},
+	}
+	for _, test := range tests {
+		nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
+		ttp := priorityFunction(ComputeTaintTolerationPriorityMap, ComputeTaintTolerationPriorityReduce, nil)
+		list, err := ttp(test.pod, nodeNameToInfo, test.nodes)
+		if err != nil {
+			t.Errorf("%s, unexpected error: %v", test.test, err)
+		}
+
+		if !reflect.DeepEqual(test.expectedList, list) {
+			t.Errorf("%s,\nexpected:\n\t%+v,\ngot:\n\t%+v", test.test, test.expectedList, list)
+		}
+	}
+
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/test_util.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package priorities
+
+import (
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+func makeNode(node string, milliCPU, memory int64) *v1.Node {
+	return &v1.Node{
+		ObjectMeta: metav1.ObjectMeta{Name: node},
+		Status: v1.NodeStatus{
+			Capacity: v1.ResourceList{
+				v1.ResourceCPU:    *resource.NewMilliQuantity(milliCPU, resource.DecimalSI),
+				v1.ResourceMemory: *resource.NewQuantity(memory, resource.BinarySI),
+			},
+			Allocatable: v1.ResourceList{
+				v1.ResourceCPU:    *resource.NewMilliQuantity(milliCPU, resource.DecimalSI),
+				v1.ResourceMemory: *resource.NewQuantity(memory, resource.BinarySI),
+			},
+		},
+	}
+}
+
+func priorityFunction(mapFn algorithm.PriorityMapFunction, reduceFn algorithm.PriorityReduceFunction, mataData interface{}) algorithm.PriorityFunction {
+	return func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
+		result := make(schedulerapi.HostPriorityList, 0, len(nodes))
+		for i := range nodes {
+			hostResult, err := mapFn(pod, mataData, nodeNameToInfo[nodes[i].Name])
+			if err != nil {
+				return nil, err
+			}
+			result = append(result, hostResult)
+		}
+		if reduceFn != nil {
+			if err := reduceFn(pod, mataData, nodeNameToInfo, result); err != nil {
+				return nil, err
+			}
+		}
+		return result, nil
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/BUILD

@@ -0,0 +1,55 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "non_zero_test.go",
+        "topologies_test.go",
+        "util_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//vendor/github.com/stretchr/testify/assert:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/selection:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+    ],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "non_zero.go",
+        "topologies.go",
+        "util.go",
+    ],
+    importpath = "k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util",
+    deps = [
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/non_zero.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import "k8s.io/api/core/v1"
+
+// For each of these resources, a pod that doesn't request the resource explicitly
+// will be treated as having requested the amount indicated below, for the purpose
+// of computing priority only. This ensures that when scheduling zero-request pods, such
+// pods will not all be scheduled to the machine with the smallest in-use request,
+// and that when scheduling regular pods, such pods will not see zero-request pods as
+// consuming no resources whatsoever. We chose these values to be similar to the
+// resources that we give to cluster addon pods (#10653). But they are pretty arbitrary.
+// As described in #11713, we use request instead of limit to deal with resource requirements.
+
+// DefaultMilliCPURequest defines default milli cpu request number.
+const DefaultMilliCPURequest int64 = 100 // 0.1 core
+// DefaultMemoryRequest defines default memory request size.
+const DefaultMemoryRequest int64 = 200 * 1024 * 1024 // 200 MB
+
+// GetNonzeroRequests returns the default resource request if none is found or what is provided on the request
+// TODO: Consider setting default as a fixed fraction of machine capacity (take "capacity v1.ResourceList"
+// as an additional argument here) rather than using constants
+func GetNonzeroRequests(requests *v1.ResourceList) (int64, int64) {
+	var outMilliCPU, outMemory int64
+	// Override if un-set, but not if explicitly set to zero
+	if _, found := (*requests)[v1.ResourceCPU]; !found {
+		outMilliCPU = DefaultMilliCPURequest
+	} else {
+		outMilliCPU = requests.Cpu().MilliValue()
+	}
+	// Override if un-set, but not if explicitly set to zero
+	if _, found := (*requests)[v1.ResourceMemory]; !found {
+		outMemory = DefaultMemoryRequest
+	} else {
+		outMemory = requests.Memory().Value()
+	}
+	return outMilliCPU, outMemory
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/non_zero_test.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+)
+
+func TestGetNonzeroRequests(t *testing.T) {
+	tds := []struct {
+		name           string
+		requests       v1.ResourceList
+		expectedCPU    int64
+		expectedMemory int64
+	}{
+		{
+			"cpu_and_memory_not_found",
+			v1.ResourceList{},
+			DefaultMilliCPURequest,
+			DefaultMemoryRequest,
+		},
+		{
+			"only_cpu_exist",
+			v1.ResourceList{
+				v1.ResourceCPU: resource.MustParse("200m"),
+			},
+			200,
+			DefaultMemoryRequest,
+		},
+		{
+			"only_memory_exist",
+			v1.ResourceList{
+				v1.ResourceMemory: resource.MustParse("400Mi"),
+			},
+			DefaultMilliCPURequest,
+			400 * 1024 * 1024,
+		},
+		{
+			"cpu_memory_exist",
+			v1.ResourceList{
+				v1.ResourceCPU:    resource.MustParse("200m"),
+				v1.ResourceMemory: resource.MustParse("400Mi"),
+			},
+			200,
+			400 * 1024 * 1024,
+		},
+	}
+
+	for _, td := range tds {
+		realCPU, realMemory := GetNonzeroRequests(&td.requests)
+		assert.EqualValuesf(t, td.expectedCPU, realCPU, "Failed to test: %s", td.name)
+		assert.EqualValuesf(t, td.expectedMemory, realMemory, "Failed to test: %s", td.name)
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/topologies.go

@@ -0,0 +1,81 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+// GetNamespacesFromPodAffinityTerm returns a set of names
+// according to the namespaces indicated in podAffinityTerm.
+// If namespaces is empty it considers the given pod's namespace.
+func GetNamespacesFromPodAffinityTerm(pod *v1.Pod, podAffinityTerm *v1.PodAffinityTerm) sets.String {
+	names := sets.String{}
+	if len(podAffinityTerm.Namespaces) == 0 {
+		names.Insert(pod.Namespace)
+	} else {
+		names.Insert(podAffinityTerm.Namespaces...)
+	}
+	return names
+}
+
+// PodMatchesTermsNamespaceAndSelector returns true if the given <pod>
+// matches the namespace and selector defined by <affinityPod>`s <term>.
+func PodMatchesTermsNamespaceAndSelector(pod *v1.Pod, namespaces sets.String, selector labels.Selector) bool {
+	if !namespaces.Has(pod.Namespace) {
+		return false
+	}
+
+	if !selector.Matches(labels.Set(pod.Labels)) {
+		return false
+	}
+	return true
+}
+
+// NodesHaveSameTopologyKey checks if nodeA and nodeB have same label value with given topologyKey as label key.
+// Returns false if topologyKey is empty.
+func NodesHaveSameTopologyKey(nodeA, nodeB *v1.Node, topologyKey string) bool {
+	if len(topologyKey) == 0 {
+		return false
+	}
+
+	if nodeA.Labels == nil || nodeB.Labels == nil {
+		return false
+	}
+
+	nodeALabel, okA := nodeA.Labels[topologyKey]
+	nodeBLabel, okB := nodeB.Labels[topologyKey]
+
+	// If found label in both nodes, check the label
+	if okB && okA {
+		return nodeALabel == nodeBLabel
+	}
+
+	return false
+}
+
+// Topologies contains topologies information of nodes.
+type Topologies struct {
+	DefaultKeys []string
+}
+
+// NodesHaveSameTopologyKey checks if nodeA and nodeB have same label value with given topologyKey as label key.
+func (tps *Topologies) NodesHaveSameTopologyKey(nodeA, nodeB *v1.Node, topologyKey string) bool {
+	return NodesHaveSameTopologyKey(nodeA, nodeB, topologyKey)
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/topologies_test.go

@@ -0,0 +1,254 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/selection"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+func fakePod() *v1.Pod {
+	return &v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "topologies_pod",
+			Namespace: metav1.NamespaceDefault,
+			UID:       "551f5a43-9f2f-11e7-a589-fa163e148d75",
+		},
+	}
+}
+
+func TestGetNamespacesFromPodAffinityTerm(t *testing.T) {
+	tests := []struct {
+		name            string
+		podAffinityTerm *v1.PodAffinityTerm
+		expectedValue   sets.String
+	}{
+		{
+			"podAffinityTerm_namespace_empty",
+			&v1.PodAffinityTerm{},
+			sets.String{metav1.NamespaceDefault: sets.Empty{}},
+		},
+		{
+			"podAffinityTerm_namespace_not_empty",
+			&v1.PodAffinityTerm{
+				Namespaces: []string{metav1.NamespacePublic, metav1.NamespaceSystem},
+			},
+			sets.String{metav1.NamespacePublic: sets.Empty{}, metav1.NamespaceSystem: sets.Empty{}},
+		},
+	}
+
+	for _, test := range tests {
+		realValue := GetNamespacesFromPodAffinityTerm(fakePod(), test.podAffinityTerm)
+		assert.EqualValuesf(t, test.expectedValue, realValue, "Failed to test: %s", test.name)
+	}
+}
+
+func TestPodMatchesTermsNamespaceAndSelector(t *testing.T) {
+	fakeNamespaces := sets.String{metav1.NamespacePublic: sets.Empty{}, metav1.NamespaceSystem: sets.Empty{}}
+	fakeRequirement, _ := labels.NewRequirement("service", selection.In, []string{"topologies_service1", "topologies_service2"})
+	fakeSelector := labels.NewSelector().Add(*fakeRequirement)
+
+	tests := []struct {
+		name           string
+		podNamespaces  string
+		podLabels      map[string]string
+		expectedResult bool
+	}{
+		{
+			"namespace_not_in",
+			metav1.NamespaceDefault,
+			map[string]string{"service": "topologies_service1"},
+			false,
+		},
+		{
+			"label_not_match",
+			metav1.NamespacePublic,
+			map[string]string{"service": "topologies_service3"},
+			false,
+		},
+		{
+			"normal_case",
+			metav1.NamespacePublic,
+			map[string]string{"service": "topologies_service1"},
+			true,
+		},
+	}
+
+	for _, test := range tests {
+		fakeTestPod := fakePod()
+		fakeTestPod.Namespace = test.podNamespaces
+		fakeTestPod.Labels = test.podLabels
+
+		realValue := PodMatchesTermsNamespaceAndSelector(fakeTestPod, fakeNamespaces, fakeSelector)
+		assert.EqualValuesf(t, test.expectedResult, realValue, "Faild to test: %s", test.name)
+	}
+
+}
+
+func TestNodesHaveSameTopologyKey(t *testing.T) {
+	tests := []struct {
+		name         string
+		nodeA, nodeB *v1.Node
+		topologyKey  string
+		expected     bool
+	}{
+		{
+			name: "nodeA{'a':'a'} vs. empty label in nodeB",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "a",
+					},
+				},
+			},
+			nodeB:       &v1.Node{},
+			expected:    false,
+			topologyKey: "a",
+		},
+		{
+			name: "nodeA{'a':'a'} vs. nodeB{'a':'a'}",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "a",
+					},
+				},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "a",
+					},
+				},
+			},
+			expected:    true,
+			topologyKey: "a",
+		},
+		{
+			name: "nodeA{'a':''} vs. empty label in nodeB",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			nodeB:       &v1.Node{},
+			expected:    false,
+			topologyKey: "a",
+		},
+		{
+			name: "nodeA{'a':''} vs. nodeB{'a':''}",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			expected:    true,
+			topologyKey: "a",
+		},
+		{
+			name: "nodeA{'a':'a'} vs. nodeB{'a':'a'} by key{'b'}",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "a",
+					},
+				},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "a",
+					},
+				},
+			},
+			expected:    false,
+			topologyKey: "b",
+		},
+		{
+			name: "topologyKey empty",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			expected:    false,
+			topologyKey: "",
+		},
+		{
+			name: "nodeA lable nil vs. nodeB{'a':''} by key('a')",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			expected:    false,
+			topologyKey: "a",
+		},
+		{
+			name: "nodeA{'a':''}  vs. nodeB label is nil by key('a')",
+			nodeA: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						"a": "",
+					},
+				},
+			},
+			nodeB: &v1.Node{
+				ObjectMeta: metav1.ObjectMeta{},
+			},
+			expected:    false,
+			topologyKey: "a",
+		},
+	}
+
+	for _, test := range tests {
+		got := NodesHaveSameTopologyKey(test.nodeA, test.nodeB, test.topologyKey)
+		assert.Equalf(t, test.expected, got, "Failed to test: %s", test.name)
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/util.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// GetControllerRef gets pod's owner controller reference from a pod object.
+func GetControllerRef(pod *v1.Pod) *metav1.OwnerReference {
+	if len(pod.OwnerReferences) == 0 {
+		return nil
+	}
+	for i := range pod.OwnerReferences {
+		ref := &pod.OwnerReferences[i]
+		if ref.Controller != nil && *ref.Controller {
+			return ref
+		}
+	}
+	return nil
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/priorities/util/util_test.go

@@ -0,0 +1,119 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func TestGetControllerRef(t *testing.T) {
+	fakeBlockOwnerDeletion := true
+	fakeFalseController := false
+	fakeTrueController := true
+	fakeEmptyOwnerReference := metav1.OwnerReference{}
+
+	tds := []struct {
+		name        string
+		pod         v1.Pod
+		expectedNil bool
+		expectedOR  metav1.OwnerReference
+	}{
+		{
+			"ownerreference_not_exist",
+			v1.Pod{},
+			true,
+			fakeEmptyOwnerReference,
+		},
+		{
+			"ownerreference_controller_is_nil",
+			v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					OwnerReferences: []metav1.OwnerReference{
+						{
+							APIVersion:         "extensions/v1beta1",
+							Kind:               "ReplicaSet",
+							Name:               "or-unit-test-5b9cffccff",
+							UID:                "a46372ea-b254-11e7-8373-fa163e25bfb5",
+							BlockOwnerDeletion: &fakeBlockOwnerDeletion,
+						},
+					},
+				},
+			},
+			true,
+			fakeEmptyOwnerReference,
+		},
+		{
+			"ownerreference_controller_is_false",
+			v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					OwnerReferences: []metav1.OwnerReference{
+						{
+							APIVersion:         "extensions/v1beta1",
+							Kind:               "ReplicaSet",
+							Name:               "or-unit-test-5b9cffccff",
+							UID:                "a46372ea-b254-11e7-8373-fa163e25bfb5",
+							Controller:         &fakeFalseController,
+							BlockOwnerDeletion: &fakeBlockOwnerDeletion,
+						},
+					},
+				},
+			},
+			true,
+			fakeEmptyOwnerReference,
+		},
+		{
+			"ownerreference_controller_is_true",
+			v1.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					OwnerReferences: []metav1.OwnerReference{
+						{
+							APIVersion:         "extensions/v1beta1",
+							Kind:               "ReplicaSet",
+							Name:               "or-unit-test-5b9cffccff",
+							UID:                "a46372ea-b254-11e7-8373-fa163e25bfb5",
+							BlockOwnerDeletion: &fakeBlockOwnerDeletion,
+							Controller:         &fakeTrueController,
+						},
+					},
+				},
+			},
+			false,
+			metav1.OwnerReference{
+				APIVersion:         "extensions/v1beta1",
+				Kind:               "ReplicaSet",
+				Name:               "or-unit-test-5b9cffccff",
+				UID:                "a46372ea-b254-11e7-8373-fa163e25bfb5",
+				BlockOwnerDeletion: &fakeBlockOwnerDeletion,
+				Controller:         &fakeTrueController,
+			},
+		},
+	}
+
+	for _, td := range tds {
+		realOR := GetControllerRef(&td.pod)
+		if td.expectedNil {
+			assert.Nilf(t, realOR, "Failed to test: %s", td.name)
+		} else {
+			assert.Equalf(t, &td.expectedOR, realOR, "Failed to test: %s", td.name)
+		}
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/scheduler_interface.go

@@ -0,0 +1,65 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package algorithm
+
+import (
+	"k8s.io/api/core/v1"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// SchedulerExtender is an interface for external processes to influence scheduling
+// decisions made by Kubernetes. This is typically needed for resources not directly
+// managed by Kubernetes.
+type SchedulerExtender interface {
+	// Filter based on extender-implemented predicate functions. The filtered list is
+	// expected to be a subset of the supplied list. failedNodesMap optionally contains
+	// the list of failed nodes and failure reasons.
+	Filter(pod *v1.Pod, nodes []*v1.Node, nodeNameToInfo map[string]*schedulercache.NodeInfo) (filteredNodes []*v1.Node, failedNodesMap schedulerapi.FailedNodesMap, err error)
+
+	// Prioritize based on extender-implemented priority functions. The returned scores & weight
+	// are used to compute the weighted score for an extender. The weighted scores are added to
+	// the scores computed  by Kubernetes scheduler. The total scores are used to do the host selection.
+	Prioritize(pod *v1.Pod, nodes []*v1.Node) (hostPriorities *schedulerapi.HostPriorityList, weight int, err error)
+
+	// Bind delegates the action of binding a pod to a node to the extender.
+	Bind(binding *v1.Binding) error
+
+	// IsBinder returns whether this extender is configured for the Bind method.
+	IsBinder() bool
+
+	// IsInterested returns true if at least one extended resource requested by
+	// this pod is managed by this extender.
+	IsInterested(pod *v1.Pod) bool
+}
+
+// ScheduleAlgorithm is an interface implemented by things that know how to schedule pods
+// onto machines.
+type ScheduleAlgorithm interface {
+	Schedule(*v1.Pod, NodeLister) (selectedMachine string, err error)
+	// Preempt receives scheduling errors for a pod and tries to create room for
+	// the pod by preempting lower priority pods if possible.
+	// It returns the node where preemption happened, a list of preempted pods, a
+	// list of pods whose nominated node name should be removed, and error if any.
+	Preempt(*v1.Pod, NodeLister, error) (selectedNode *v1.Node, preemptedPods []*v1.Pod, cleanupNominatedPods []*v1.Pod, err error)
+	// Predicates() returns a pointer to a map of predicate functions. This is
+	// exposed for testing.
+	Predicates() map[string]FitPredicate
+	// Prioritizers returns a slice of priority config. This is exposed for
+	// testing.
+	Prioritizers() []PriorityConfig
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/scheduler_interface_test.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package algorithm
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+)
+
+// Some functions used by multiple scheduler tests.
+
+type schedulerTester struct {
+	t          *testing.T
+	scheduler  ScheduleAlgorithm
+	nodeLister NodeLister
+}
+
+// Call if you know exactly where pod should get scheduled.
+func (st *schedulerTester) expectSchedule(pod *v1.Pod, expected string) {
+	actual, err := st.scheduler.Schedule(pod, st.nodeLister)
+	if err != nil {
+		st.t.Errorf("Unexpected error %v\nTried to schedule: %#v", err, pod)
+		return
+	}
+	if actual != expected {
+		st.t.Errorf("Unexpected scheduling value: %v, expected %v", actual, expected)
+	}
+}
+
+// Call if you can't predict where pod will be scheduled.
+func (st *schedulerTester) expectSuccess(pod *v1.Pod) {
+	_, err := st.scheduler.Schedule(pod, st.nodeLister)
+	if err != nil {
+		st.t.Errorf("Unexpected error %v\nTried to schedule: %#v", err, pod)
+		return
+	}
+}
+
+// Call if pod should *not* schedule.
+func (st *schedulerTester) expectFailure(pod *v1.Pod) {
+	_, err := st.scheduler.Schedule(pod, st.nodeLister)
+	if err == nil {
+		st.t.Error("Unexpected non-error")
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/types.go

@@ -0,0 +1,169 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package algorithm
+
+import (
+	apps "k8s.io/api/apps/v1beta1"
+	"k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
+	"k8s.io/apimachinery/pkg/labels"
+	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// FitPredicate is a function that indicates if a pod fits into an existing node.
+// The failure information is given by the error.
+type FitPredicate func(pod *v1.Pod, meta PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []PredicateFailureReason, error)
+
+// PriorityMapFunction is a function that computes per-node results for a given node.
+// TODO: Figure out the exact API of this method.
+// TODO: Change interface{} to a specific type.
+type PriorityMapFunction func(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error)
+
+// PriorityReduceFunction is a function that aggregated per-node results and computes
+// final scores for all nodes.
+// TODO: Figure out the exact API of this method.
+// TODO: Change interface{} to a specific type.
+type PriorityReduceFunction func(pod *v1.Pod, meta interface{}, nodeNameToInfo map[string]*schedulercache.NodeInfo, result schedulerapi.HostPriorityList) error
+
+// PredicateMetadataProducer is a function that computes predicate metadata for a given pod.
+type PredicateMetadataProducer func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) PredicateMetadata
+
+// PriorityMetadataProducer is a function that computes metadata for a given pod. This
+// is now used for only for priority functions. For predicates please use PredicateMetadataProducer.
+type PriorityMetadataProducer func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) interface{}
+
+// PriorityFunction is a function that computes scores for all nodes.
+// DEPRECATED
+// Use Map-Reduce pattern for priority functions.
+type PriorityFunction func(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error)
+
+// PriorityConfig is a config used for a priority function.
+type PriorityConfig struct {
+	Name   string
+	Map    PriorityMapFunction
+	Reduce PriorityReduceFunction
+	// TODO: Remove it after migrating all functions to
+	// Map-Reduce pattern.
+	Function PriorityFunction
+	Weight   int
+}
+
+// EmptyPredicateMetadataProducer returns a no-op MetadataProducer type.
+func EmptyPredicateMetadataProducer(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) PredicateMetadata {
+	return nil
+}
+
+// EmptyPriorityMetadataProducer returns a no-op PriorityMetadataProducer type.
+func EmptyPriorityMetadataProducer(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo) interface{} {
+	return nil
+}
+
+// PredicateFailureReason interface represents the failure reason of a predicate.
+type PredicateFailureReason interface {
+	GetReason() string
+}
+
+// GetEquivalencePodFunc is a function that gets a EquivalencePod from a pod.
+type GetEquivalencePodFunc func(pod *v1.Pod) interface{}
+
+// NodeLister interface represents anything that can list nodes for a scheduler.
+type NodeLister interface {
+	// We explicitly return []*v1.Node, instead of v1.NodeList, to avoid
+	// performing expensive copies that are unneeded.
+	List() ([]*v1.Node, error)
+}
+
+// PodLister interface represents anything that can list pods for a scheduler.
+type PodLister interface {
+	// We explicitly return []*v1.Pod, instead of v1.PodList, to avoid
+	// performing expensive copies that are unneeded.
+	List(labels.Selector) ([]*v1.Pod, error)
+	// This is similar to "List()", but the returned slice does not
+	// contain pods that don't pass `podFilter`.
+	FilteredList(podFilter schedulercache.PodFilter, selector labels.Selector) ([]*v1.Pod, error)
+}
+
+// ServiceLister interface represents anything that can produce a list of services; the list is consumed by a scheduler.
+type ServiceLister interface {
+	// Lists all the services
+	List(labels.Selector) ([]*v1.Service, error)
+	// Gets the services for the given pod
+	GetPodServices(*v1.Pod) ([]*v1.Service, error)
+}
+
+// ControllerLister interface represents anything that can produce a list of ReplicationController; the list is consumed by a scheduler.
+type ControllerLister interface {
+	// Lists all the replication controllers
+	List(labels.Selector) ([]*v1.ReplicationController, error)
+	// Gets the services for the given pod
+	GetPodControllers(*v1.Pod) ([]*v1.ReplicationController, error)
+}
+
+// ReplicaSetLister interface represents anything that can produce a list of ReplicaSet; the list is consumed by a scheduler.
+type ReplicaSetLister interface {
+	// Gets the replicasets for the given pod
+	GetPodReplicaSets(*v1.Pod) ([]*extensions.ReplicaSet, error)
+}
+
+var _ ControllerLister = &EmptyControllerLister{}
+
+// EmptyControllerLister implements ControllerLister on []v1.ReplicationController returning empty data
+type EmptyControllerLister struct{}
+
+// List returns nil
+func (f EmptyControllerLister) List(labels.Selector) ([]*v1.ReplicationController, error) {
+	return nil, nil
+}
+
+// GetPodControllers returns nil
+func (f EmptyControllerLister) GetPodControllers(pod *v1.Pod) (controllers []*v1.ReplicationController, err error) {
+	return nil, nil
+}
+
+var _ ReplicaSetLister = &EmptyReplicaSetLister{}
+
+// EmptyReplicaSetLister implements ReplicaSetLister on []extensions.ReplicaSet returning empty data
+type EmptyReplicaSetLister struct{}
+
+// GetPodReplicaSets returns nil
+func (f EmptyReplicaSetLister) GetPodReplicaSets(pod *v1.Pod) (rss []*extensions.ReplicaSet, err error) {
+	return nil, nil
+}
+
+// StatefulSetLister interface represents anything that can produce a list of StatefulSet; the list is consumed by a scheduler.
+type StatefulSetLister interface {
+	// Gets the StatefulSet for the given pod.
+	GetPodStatefulSets(*v1.Pod) ([]*apps.StatefulSet, error)
+}
+
+var _ StatefulSetLister = &EmptyStatefulSetLister{}
+
+// EmptyStatefulSetLister implements StatefulSetLister on []apps.StatefulSet returning empty data.
+type EmptyStatefulSetLister struct{}
+
+// GetPodStatefulSets of EmptyStatefulSetLister returns nil.
+func (f EmptyStatefulSetLister) GetPodStatefulSets(pod *v1.Pod) (sss []*apps.StatefulSet, err error) {
+	return nil, nil
+}
+
+// PredicateMetadata interface represents anything that can access a predicate metadata.
+type PredicateMetadata interface {
+	ShallowCopy() PredicateMetadata
+	AddPod(addedPod *v1.Pod, nodeInfo *schedulercache.NodeInfo) error
+	RemovePod(deletedPod *v1.Pod) error
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/types_test.go

@@ -0,0 +1,65 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package algorithm
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/kubernetes/pkg/scheduler/schedulercache"
+)
+
+// EmptyPriorityMetadataProducer should returns a no-op PriorityMetadataProducer type.
+func TestEmptyPriorityMetadataProducer(t *testing.T) {
+	fakePod := new(v1.Pod)
+	fakeLabelSelector := labels.SelectorFromSet(labels.Set{"foo": "bar"})
+
+	nodeNameToInfo := map[string]*schedulercache.NodeInfo{
+		"2": schedulercache.NewNodeInfo(fakePod),
+		"1": schedulercache.NewNodeInfo(),
+	}
+	// Test EmptyPriorityMetadataProducer
+	metadata := EmptyPriorityMetadataProducer(fakePod, nodeNameToInfo)
+	if metadata != nil {
+		t.Errorf("failed to produce empty metadata: got %v, expected nil", metadata)
+	}
+	// Test EmptyControllerLister should return nill
+	controllerLister := EmptyControllerLister{}
+	nilController, nilError := controllerLister.List(fakeLabelSelector)
+	if nilController != nil || nilError != nil {
+		t.Errorf("failed to produce empty controller lister: got %v, expected nil", nilController)
+	}
+	// Test GetPodControllers on empty controller lister should return nill
+	nilController, nilError = controllerLister.GetPodControllers(fakePod)
+	if nilController != nil || nilError != nil {
+		t.Errorf("failed to produce empty controller lister: got %v, expected nil", nilController)
+	}
+	// Test GetPodReplicaSets on empty replica sets should return nill
+	replicaSetLister := EmptyReplicaSetLister{}
+	nilRss, nilErrRss := replicaSetLister.GetPodReplicaSets(fakePod)
+	if nilRss != nil || nilErrRss != nil {
+		t.Errorf("failed to produce empty replicaSetLister: got %v, expected nil", nilRss)
+	}
+
+	// Test GetPodStatefulSets on empty replica sets should return nill
+	statefulSetLister := EmptyStatefulSetLister{}
+	nilSSL, nilErrSSL := statefulSetLister.GetPodStatefulSets(fakePod)
+	if nilSSL != nil || nilErrSSL != nil {
+		t.Errorf("failed to produce empty statefulSetLister: got %v, expected nil", nilSSL)
+	}
+}

vendor/k8s.io/kubernetes/pkg/scheduler/algorithm/well_known_labels.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package algorithm
+
+const (
+	// TaintNodeNotReady will be added when node is not ready
+	// and feature-gate for TaintBasedEvictions flag is enabled,
+	// and removed when node becomes ready.
+	TaintNodeNotReady = "node.kubernetes.io/not-ready"
+
+	// DeprecatedTaintNodeNotReady is the deprecated version of TaintNodeNotReady.
+	// It is deprecated since 1.9
+	DeprecatedTaintNodeNotReady = "node.alpha.kubernetes.io/notReady"
+
+	// TaintNodeUnreachable will be added when node becomes unreachable
+	// (corresponding to NodeReady status ConditionUnknown)
+	// and feature-gate for TaintBasedEvictions flag is enabled,
+	// and removed when node becomes reachable (NodeReady status ConditionTrue).
+	TaintNodeUnreachable = "node.kubernetes.io/unreachable"
+
+	// DeprecatedTaintNodeUnreachable is the deprecated version of TaintNodeUnreachable.
+	// It is deprecated since 1.9
+	DeprecatedTaintNodeUnreachable = "node.alpha.kubernetes.io/unreachable"
+
+	// TaintNodeOutOfDisk will be added when node becomes out of disk
+	// and feature-gate for TaintNodesByCondition flag is enabled,
+	// and removed when node has enough disk.
+	TaintNodeOutOfDisk = "node.kubernetes.io/out-of-disk"
+
+	// TaintNodeMemoryPressure will be added when node has memory pressure
+	// and feature-gate for TaintNodesByCondition flag is enabled,
+	// and removed when node has enough memory.
+	TaintNodeMemoryPressure = "node.kubernetes.io/memory-pressure"
+
+	// TaintNodeDiskPressure will be added when node has disk pressure
+	// and feature-gate for TaintNodesByCondition flag is enabled,
+	// and removed when node has enough disk.
+	TaintNodeDiskPressure = "node.kubernetes.io/disk-pressure"
+
+	// TaintNodeNetworkUnavailable will be added when node's network is unavailable
+	// and feature-gate for TaintNodesByCondition flag is enabled,
+	// and removed when network becomes ready.
+	TaintNodeNetworkUnavailable = "node.kubernetes.io/network-unavailable"
+
+	// TaintNodePIDPressure will be added when node has pid pressure
+	// and feature-gate for TaintNodesByCondition flag is enabled,
+	// and removed when node has enough disk.
+	TaintNodePIDPressure = "node.kubernetes.io/pid-pressure"
+
+	// TaintExternalCloudProvider sets this taint on a node to mark it as unusable,
+	// when kubelet is started with the "external" cloud provider, until a controller
+	// from the cloud-controller-manager intitializes this node, and then removes
+	// the taint
+	TaintExternalCloudProvider = "node.cloudprovider.kubernetes.io/uninitialized"
+)