vendor files

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/BUILD

@@ -0,0 +1,61 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "backoff_utils_test.go",
+        "testutil_test.go",
+        "utils_test.go",
+    ],
+    importpath = "k8s.io/kubernetes/plugin/pkg/scheduler/util",
+    library = ":go_default_library",
+    deps = [
+        "//pkg/apis/scheduling:go_default_library",
+        "//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/runtime:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
+    ],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "backoff_utils.go",
+        "testutil.go",
+        "utils.go",
+    ],
+    importpath = "k8s.io/kubernetes/plugin/pkg/scheduler/util",
+    deps = [
+        "//pkg/api/legacyscheme:go_default_library",
+        "//pkg/apis/core:go_default_library",
+        "//pkg/apis/core/install:go_default_library",
+        "//pkg/apis/scheduling:go_default_library",
+        "//pkg/features: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/runtime:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types: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/plugin/pkg/scheduler/util/backoff_utils.go

@@ -0,0 +1,137 @@
+/*
+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 (
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	ktypes "k8s.io/apimachinery/pkg/types"
+
+	"github.com/golang/glog"
+)
+
+type clock interface {
+	Now() time.Time
+}
+
+type realClock struct{}
+
+func (realClock) Now() time.Time {
+	return time.Now()
+}
+
+// backoffEntry is single threaded.  in particular, it only allows a single action to be waiting on backoff at a time.
+// It is expected that all users will only use the public TryWait(...) method
+// It is also not safe to copy this object.
+type backoffEntry struct {
+	backoff     time.Duration
+	lastUpdate  time.Time
+	reqInFlight int32
+}
+
+// tryLock attempts to acquire a lock via atomic compare and swap.
+// returns true if the lock was acquired, false otherwise
+func (b *backoffEntry) tryLock() bool {
+	return atomic.CompareAndSwapInt32(&b.reqInFlight, 0, 1)
+}
+
+// unlock returns the lock.  panics if the lock isn't held
+func (b *backoffEntry) unlock() {
+	if !atomic.CompareAndSwapInt32(&b.reqInFlight, 1, 0) {
+		panic(fmt.Sprintf("unexpected state on unlocking: %+v", b))
+	}
+}
+
+// TryWait tries to acquire the backoff lock, maxDuration is the maximum allowed period to wait for.
+func (b *backoffEntry) TryWait(maxDuration time.Duration) bool {
+	if !b.tryLock() {
+		return false
+	}
+	defer b.unlock()
+	b.wait(maxDuration)
+	return true
+}
+
+func (entry *backoffEntry) getBackoff(maxDuration time.Duration) time.Duration {
+	duration := entry.backoff
+	newDuration := time.Duration(duration) * 2
+	if newDuration > maxDuration {
+		newDuration = maxDuration
+	}
+	entry.backoff = newDuration
+	glog.V(4).Infof("Backing off %s", duration.String())
+	return duration
+}
+
+func (entry *backoffEntry) wait(maxDuration time.Duration) {
+	time.Sleep(entry.getBackoff(maxDuration))
+}
+
+type PodBackoff struct {
+	perPodBackoff   map[ktypes.NamespacedName]*backoffEntry
+	lock            sync.Mutex
+	clock           clock
+	defaultDuration time.Duration
+	maxDuration     time.Duration
+}
+
+func (p *PodBackoff) MaxDuration() time.Duration {
+	return p.maxDuration
+}
+
+func CreateDefaultPodBackoff() *PodBackoff {
+	return CreatePodBackoff(1*time.Second, 60*time.Second)
+}
+
+func CreatePodBackoff(defaultDuration, maxDuration time.Duration) *PodBackoff {
+	return CreatePodBackoffWithClock(defaultDuration, maxDuration, realClock{})
+}
+
+func CreatePodBackoffWithClock(defaultDuration, maxDuration time.Duration, clock clock) *PodBackoff {
+	return &PodBackoff{
+		perPodBackoff:   map[ktypes.NamespacedName]*backoffEntry{},
+		clock:           clock,
+		defaultDuration: defaultDuration,
+		maxDuration:     maxDuration,
+	}
+}
+
+func (p *PodBackoff) GetEntry(podID ktypes.NamespacedName) *backoffEntry {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	entry, ok := p.perPodBackoff[podID]
+	if !ok {
+		entry = &backoffEntry{backoff: p.defaultDuration}
+		p.perPodBackoff[podID] = entry
+	}
+	entry.lastUpdate = p.clock.Now()
+	return entry
+}
+
+func (p *PodBackoff) Gc() {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	now := p.clock.Now()
+	for podID, entry := range p.perPodBackoff {
+		if now.Sub(entry.lastUpdate) > p.maxDuration {
+			delete(p.perPodBackoff, podID)
+		}
+	}
+}

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/backoff_utils_test.go

@@ -0,0 +1,86 @@
+/*
+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"
+	"time"
+
+	ktypes "k8s.io/apimachinery/pkg/types"
+)
+
+type fakeClock struct {
+	t time.Time
+}
+
+func (f *fakeClock) Now() time.Time {
+	return f.t
+}
+
+func TestBackoff(t *testing.T) {
+	clock := fakeClock{}
+	backoff := CreatePodBackoffWithClock(1*time.Second, 60*time.Second, &clock)
+	tests := []struct {
+		podID            ktypes.NamespacedName
+		expectedDuration time.Duration
+		advanceClock     time.Duration
+	}{
+		{
+			podID:            ktypes.NamespacedName{Namespace: "default", Name: "foo"},
+			expectedDuration: 1 * time.Second,
+		},
+		{
+			podID:            ktypes.NamespacedName{Namespace: "default", Name: "foo"},
+			expectedDuration: 2 * time.Second,
+		},
+		{
+			podID:            ktypes.NamespacedName{Namespace: "default", Name: "foo"},
+			expectedDuration: 4 * time.Second,
+		},
+		{
+			podID:            ktypes.NamespacedName{Namespace: "default", Name: "bar"},
+			expectedDuration: 1 * time.Second,
+			advanceClock:     120 * time.Second,
+		},
+		// 'foo' should have been gc'd here.
+		{
+			podID:            ktypes.NamespacedName{Namespace: "default", Name: "foo"},
+			expectedDuration: 1 * time.Second,
+		},
+	}
+
+	for _, test := range tests {
+		duration := backoff.GetEntry(test.podID).getBackoff(backoff.maxDuration)
+		if duration != test.expectedDuration {
+			t.Errorf("expected: %s, got %s for %s", test.expectedDuration.String(), duration.String(), test.podID)
+		}
+		clock.t = clock.t.Add(test.advanceClock)
+		backoff.Gc()
+	}
+	fooID := ktypes.NamespacedName{Namespace: "default", Name: "foo"}
+	backoff.perPodBackoff[fooID].backoff = 60 * time.Second
+	duration := backoff.GetEntry(fooID).getBackoff(backoff.maxDuration)
+	if duration != 60*time.Second {
+		t.Errorf("expected: 60, got %s", duration.String())
+	}
+	// Verify that we split on namespaces correctly, same name, different namespace
+	fooID.Namespace = "other"
+	duration = backoff.GetEntry(fooID).getBackoff(backoff.maxDuration)
+	if duration != 1*time.Second {
+		t.Errorf("expected: 1, got %s", duration.String())
+	}
+}

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/testutil.go

@@ -0,0 +1,169 @@
+/*
+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 (
+	"fmt"
+	"mime"
+	"os"
+	"reflect"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
+	api "k8s.io/kubernetes/pkg/apis/core"
+
+	_ "k8s.io/kubernetes/pkg/apis/core/install"
+)
+
+type TestGroup struct {
+	externalGroupVersion schema.GroupVersion
+	internalGroupVersion schema.GroupVersion
+	internalTypes        map[string]reflect.Type
+	externalTypes        map[string]reflect.Type
+}
+
+var (
+	Groups = make(map[string]TestGroup)
+	Test   TestGroup
+
+	serializer runtime.SerializerInfo
+)
+
+func init() {
+	if apiMediaType := os.Getenv("KUBE_TEST_API_TYPE"); len(apiMediaType) > 0 {
+		var ok bool
+		mediaType, _, err := mime.ParseMediaType(apiMediaType)
+		if err != nil {
+			panic(err)
+		}
+		serializer, ok = runtime.SerializerInfoForMediaType(legacyscheme.Codecs.SupportedMediaTypes(), mediaType)
+		if !ok {
+			panic(fmt.Sprintf("no serializer for %s", apiMediaType))
+		}
+	}
+
+	kubeTestAPI := os.Getenv("KUBE_TEST_API")
+	if len(kubeTestAPI) != 0 {
+		// priority is "first in list preferred", so this has to run in reverse order
+		testGroupVersions := strings.Split(kubeTestAPI, ",")
+		for i := len(testGroupVersions) - 1; i >= 0; i-- {
+			gvString := testGroupVersions[i]
+			groupVersion, err := schema.ParseGroupVersion(gvString)
+			if err != nil {
+				panic(fmt.Sprintf("Error parsing groupversion %v: %v", gvString, err))
+			}
+
+			internalGroupVersion := schema.GroupVersion{Group: groupVersion.Group, Version: runtime.APIVersionInternal}
+			Groups[groupVersion.Group] = TestGroup{
+				externalGroupVersion: groupVersion,
+				internalGroupVersion: internalGroupVersion,
+				internalTypes:        legacyscheme.Scheme.KnownTypes(internalGroupVersion),
+				externalTypes:        legacyscheme.Scheme.KnownTypes(groupVersion),
+			}
+		}
+	}
+
+	if _, ok := Groups[api.GroupName]; !ok {
+		externalGroupVersion := schema.GroupVersion{Group: api.GroupName, Version: legacyscheme.Registry.GroupOrDie(api.GroupName).GroupVersion.Version}
+		Groups[api.GroupName] = TestGroup{
+			externalGroupVersion: externalGroupVersion,
+			internalGroupVersion: api.SchemeGroupVersion,
+			internalTypes:        legacyscheme.Scheme.KnownTypes(api.SchemeGroupVersion),
+			externalTypes:        legacyscheme.Scheme.KnownTypes(externalGroupVersion),
+		}
+	}
+
+	Test = Groups[api.GroupName]
+}
+
+// Codec returns the codec for the API version to test against, as set by the
+// KUBE_TEST_API_TYPE env var.
+func (g TestGroup) Codec() runtime.Codec {
+	if serializer.Serializer == nil {
+		return legacyscheme.Codecs.LegacyCodec(g.externalGroupVersion)
+	}
+	return legacyscheme.Codecs.CodecForVersions(serializer.Serializer, legacyscheme.Codecs.UniversalDeserializer(), schema.GroupVersions{g.externalGroupVersion}, nil)
+}
+
+// SelfLink returns a self link that will appear to be for the version Version().
+// 'resource' should be the resource path, e.g. "pods" for the Pod type. 'name' should be
+// empty for lists.
+func (g TestGroup) SelfLink(resource, name string) string {
+	if g.externalGroupVersion.Group == api.GroupName {
+		if name == "" {
+			return fmt.Sprintf("/api/%s/%s", g.externalGroupVersion.Version, resource)
+		}
+		return fmt.Sprintf("/api/%s/%s/%s", g.externalGroupVersion.Version, resource, name)
+	}
+
+	// TODO: will need a /apis prefix once we have proper multi-group
+	// support
+	if name == "" {
+		return fmt.Sprintf("/apis/%s/%s/%s", g.externalGroupVersion.Group, g.externalGroupVersion.Version, resource)
+	}
+	return fmt.Sprintf("/apis/%s/%s/%s/%s", g.externalGroupVersion.Group, g.externalGroupVersion.Version, resource, name)
+}
+
+// ResourcePathWithPrefix returns the appropriate path for the given prefix (watch, proxy, redirect, etc), resource, namespace and name.
+// For ex, this is of the form:
+// /api/v1/watch/namespaces/foo/pods/pod0 for v1.
+func (g TestGroup) ResourcePathWithPrefix(prefix, resource, namespace, name string) string {
+	var path string
+	if g.externalGroupVersion.Group == api.GroupName {
+		path = "/api/" + g.externalGroupVersion.Version
+	} else {
+		// TODO: switch back once we have proper multiple group support
+		// path = "/apis/" + g.Group + "/" + Version(group...)
+		path = "/apis/" + g.externalGroupVersion.Group + "/" + g.externalGroupVersion.Version
+	}
+
+	if prefix != "" {
+		path = path + "/" + prefix
+	}
+	if namespace != "" {
+		path = path + "/namespaces/" + namespace
+	}
+	// Resource names are lower case.
+	resource = strings.ToLower(resource)
+	if resource != "" {
+		path = path + "/" + resource
+	}
+	if name != "" {
+		path = path + "/" + name
+	}
+	return path
+}
+
+// ResourcePath returns the appropriate path for the given resource, namespace and name.
+// For example, this is of the form:
+// /api/v1/namespaces/foo/pods/pod0 for v1.
+func (g TestGroup) ResourcePath(resource, namespace, name string) string {
+	return g.ResourcePathWithPrefix("", resource, namespace, name)
+}
+
+// SubResourcePath returns the appropriate path for the given resource, namespace,
+// name and subresource.
+func (g TestGroup) SubResourcePath(resource, namespace, name, sub string) string {
+	path := g.ResourcePathWithPrefix("", resource, namespace, name)
+	if sub != "" {
+		path = path + "/" + sub
+	}
+
+	return path
+}

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/testutil_test.go

@@ -0,0 +1,214 @@
+/*
+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 (
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+func TestResourcePathWithPrefix(t *testing.T) {
+	testCases := []struct {
+		prefix    string
+		resource  string
+		namespace string
+		name      string
+		expected  string
+	}{
+		{"prefix", "resource", "mynamespace", "myresource", "/api/" + Test.externalGroupVersion.Version + "/prefix/namespaces/mynamespace/resource/myresource"},
+		{"prefix", "resource", "", "myresource", "/api/" + Test.externalGroupVersion.Version + "/prefix/resource/myresource"},
+		{"prefix", "resource", "mynamespace", "", "/api/" + Test.externalGroupVersion.Version + "/prefix/namespaces/mynamespace/resource"},
+		{"prefix", "resource", "", "", "/api/" + Test.externalGroupVersion.Version + "/prefix/resource"},
+		{"", "resource", "mynamespace", "myresource", "/api/" + Test.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+	}
+	for _, item := range testCases {
+		if actual := Test.ResourcePathWithPrefix(item.prefix, item.resource, item.namespace, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for prefix: %s, resource: %s, namespace: %s and name: %s", item.expected, actual, item.prefix, item.resource, item.namespace, item.name)
+		}
+	}
+
+	TestGroup := Test
+	TestGroup.externalGroupVersion.Group = "TestGroup"
+
+	testGroupCases := []struct {
+		prefix    string
+		resource  string
+		namespace string
+		name      string
+		expected  string
+	}{
+		{"prefix", "resource", "mynamespace", "myresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/prefix/namespaces/mynamespace/resource/myresource"},
+		{"prefix", "resource", "", "myresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/prefix/resource/myresource"},
+		{"prefix", "resource", "mynamespace", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/prefix/namespaces/mynamespace/resource"},
+		{"prefix", "resource", "", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/prefix/resource"},
+		{"", "resource", "mynamespace", "myresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+	}
+	for _, item := range testGroupCases {
+		if actual := TestGroup.ResourcePathWithPrefix(item.prefix, item.resource, item.namespace, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for prefix: %s, resource: %s, namespace: %s and name: %s", item.expected, actual, item.prefix, item.resource, item.namespace, item.name)
+		}
+	}
+
+}
+
+func TestResourcePath(t *testing.T) {
+	testCases := []struct {
+		resource  string
+		namespace string
+		name      string
+		expected  string
+	}{
+		{"resource", "mynamespace", "myresource", "/api/" + Test.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+		{"resource", "", "myresource", "/api/" + Test.externalGroupVersion.Version + "/resource/myresource"},
+		{"resource", "mynamespace", "", "/api/" + Test.externalGroupVersion.Version + "/namespaces/mynamespace/resource"},
+		{"resource", "", "", "/api/" + Test.externalGroupVersion.Version + "/resource"},
+	}
+	for _, item := range testCases {
+		if actual := Test.ResourcePath(item.resource, item.namespace, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s, namespace: %s and name: %s", item.expected, actual, item.resource, item.namespace, item.name)
+		}
+	}
+
+	TestGroup := Test
+	TestGroup.externalGroupVersion.Group = "TestGroup"
+
+	testGroupCases := []struct {
+		resource  string
+		namespace string
+		name      string
+		expected  string
+	}{
+		{"resource", "mynamespace", "myresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+		{"resource", "", "myresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/resource/myresource"},
+		{"resource", "mynamespace", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/namespaces/mynamespace/resource"},
+		{"resource", "", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/resource"},
+	}
+	for _, item := range testGroupCases {
+		if actual := TestGroup.ResourcePath(item.resource, item.namespace, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s, namespace: %s and name: %s", item.expected, actual, item.resource, item.namespace, item.name)
+		}
+	}
+
+}
+
+func TestSubResourcePath(t *testing.T) {
+	testCases := []struct {
+		resource  string
+		namespace string
+		name      string
+		sub       string
+		expected  string
+	}{
+		{"resource", "mynamespace", "myresource", "subresource", "/api/" + Test.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource/subresource"},
+		{"resource", "mynamespace", "myresource", "", "/api/" + Test.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+	}
+	for _, item := range testCases {
+		if actual := Test.SubResourcePath(item.resource, item.namespace, item.name, item.sub); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s, namespace: %s, name: %s and sub: %s", item.expected, actual, item.resource, item.namespace, item.name, item.sub)
+		}
+	}
+
+	TestGroup := Test
+	TestGroup.externalGroupVersion.Group = "TestGroup"
+
+	testGroupCases := []struct {
+		resource  string
+		namespace string
+		name      string
+		sub       string
+		expected  string
+	}{
+		{"resource", "mynamespace", "myresource", "subresource", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource/subresource"},
+		{"resource", "mynamespace", "myresource", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/namespaces/mynamespace/resource/myresource"},
+	}
+	for _, item := range testGroupCases {
+		if actual := TestGroup.SubResourcePath(item.resource, item.namespace, item.name, item.sub); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s, namespace: %s, name: %s and sub: %s", item.expected, actual, item.resource, item.namespace, item.name, item.sub)
+		}
+	}
+
+}
+
+func TestSelfLink(t *testing.T) {
+	testCases := []struct {
+		resource string
+		name     string
+		expected string
+	}{
+		{"resource", "name", "/api/" + Test.externalGroupVersion.Version + "/resource/name"},
+		{"resource", "", "/api/" + Test.externalGroupVersion.Version + "/resource"},
+	}
+	for _, item := range testCases {
+		if actual := Test.SelfLink(item.resource, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s and name: %s", item.expected, actual, item.resource, item.name)
+		}
+	}
+
+	TestGroup := Test
+	TestGroup.externalGroupVersion.Group = "TestGroup"
+
+	testGroupCases := []struct {
+		resource string
+		name     string
+		expected string
+	}{
+		{"resource", "name", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/resource/name"},
+		{"resource", "", "/apis/" + TestGroup.externalGroupVersion.Group + "/" + TestGroup.externalGroupVersion.Version + "/resource"},
+	}
+	for _, item := range testGroupCases {
+		if actual := TestGroup.SelfLink(item.resource, item.name); actual != item.expected {
+			t.Errorf("Expected: %s, got: %s for resource: %s and name: %s", item.expected, actual, item.resource, item.name)
+		}
+	}
+}
+
+var status = &metav1.Status{
+	Status:  metav1.StatusFailure,
+	Code:    200,
+	Reason:  metav1.StatusReasonUnknown,
+	Message: "",
+}
+
+func TestV1EncodeDecodeStatus(t *testing.T) {
+	v1Codec := Test.Codec()
+
+	encoded, err := runtime.Encode(v1Codec, status)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	typeMeta := metav1.TypeMeta{}
+	if err := json.Unmarshal(encoded, &typeMeta); err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if typeMeta.Kind != "Status" {
+		t.Errorf("Kind is not set to \"Status\". Got %v", string(encoded))
+	}
+	if typeMeta.APIVersion != "v1" {
+		t.Errorf("APIVersion is not set to \"v1\". Got %v", string(encoded))
+	}
+	decoded, err := runtime.Decode(v1Codec, encoded)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if !reflect.DeepEqual(status, decoded) {
+		t.Errorf("expected: %#v, got: %#v", status, decoded)
+	}
+}

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/utils.go

@@ -0,0 +1,120 @@
+/*
+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 (
+	"fmt"
+	"sort"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/kubernetes/pkg/apis/scheduling"
+	"k8s.io/kubernetes/pkg/features"
+)
+
+const DefaultBindAllHostIP = "0.0.0.0"
+
+// GetUsedPorts returns the used host ports of Pods: if 'port' was used, a 'port:true' pair
+// will be in the result; but it does not resolve port conflict.
+func GetUsedPorts(pods ...*v1.Pod) map[string]bool {
+	ports := make(map[string]bool)
+	for _, pod := range pods {
+		for j := range pod.Spec.Containers {
+			container := &pod.Spec.Containers[j]
+			for k := range container.Ports {
+				podPort := &container.Ports[k]
+				// "0" is explicitly ignored in PodFitsHostPorts,
+				// which is the only function that uses this value.
+				if podPort.HostPort != 0 {
+					// user does not explicitly set protocol, default is tcp
+					portProtocol := podPort.Protocol
+					if podPort.Protocol == "" {
+						portProtocol = v1.ProtocolTCP
+					}
+
+					// user does not explicitly set hostIP, default is 0.0.0.0
+					portHostIP := podPort.HostIP
+					if podPort.HostIP == "" {
+						portHostIP = "0.0.0.0"
+					}
+
+					str := fmt.Sprintf("%s/%s/%d", portProtocol, portHostIP, podPort.HostPort)
+					ports[str] = true
+				}
+			}
+		}
+	}
+	return ports
+}
+
+// PodPriorityEnabled indicates whether pod priority feature is enabled.
+func PodPriorityEnabled() bool {
+	return feature.DefaultFeatureGate.Enabled(features.PodPriority)
+}
+
+// GetPodFullName returns a name that uniquely identifies a pod.
+func GetPodFullName(pod *v1.Pod) string {
+	// Use underscore as the delimiter because it is not allowed in pod name
+	// (DNS subdomain format).
+	return pod.Name + "_" + pod.Namespace
+}
+
+// GetPodPriority return priority of the given pod.
+func GetPodPriority(pod *v1.Pod) int32 {
+	if pod.Spec.Priority != nil {
+		return *pod.Spec.Priority
+	}
+	// When priority of a running pod is nil, it means it was created at a time
+	// that there was no global default priority class and the priority class
+	// name of the pod was empty. So, we resolve to the static default priority.
+	return scheduling.DefaultPriorityWhenNoDefaultClassExists
+}
+
+// SortableList is a list that implements sort.Interface.
+type SortableList struct {
+	Items    []interface{}
+	CompFunc LessFunc
+}
+
+// LessFunc is a function that receives two items and returns true if the first
+// item should be placed before the second one when the list is sorted.
+type LessFunc func(item1, item2 interface{}) bool
+
+var _ = sort.Interface(&SortableList{})
+
+func (l *SortableList) Len() int { return len(l.Items) }
+
+func (l *SortableList) Less(i, j int) bool {
+	return l.CompFunc(l.Items[i], l.Items[j])
+}
+
+func (l *SortableList) Swap(i, j int) {
+	l.Items[i], l.Items[j] = l.Items[j], l.Items[i]
+}
+
+// Sort sorts the items in the list using the given CompFunc. Item1 is placed
+// before Item2 when CompFunc(Item1, Item2) returns true.
+func (l *SortableList) Sort() {
+	sort.Sort(l)
+}
+
+// HigherPriorityPod return true when priority of the first pod is higher than
+// the second one. It takes arguments of the type "interface{}" to be used with
+// SortableList, but expects those arguments to be *v1.Pod.
+func HigherPriorityPod(pod1, pod2 interface{}) bool {
+	return GetPodPriority(pod1.(*v1.Pod)) > GetPodPriority(pod2.(*v1.Pod))
+}

vendor/k8s.io/kubernetes/plugin/pkg/scheduler/util/utils_test.go

@@ -0,0 +1,95 @@
+/*
+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"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/apis/scheduling"
+)
+
+// TestGetPodPriority tests GetPodPriority function.
+func TestGetPodPriority(t *testing.T) {
+	p := int32(20)
+	tests := []struct {
+		name             string
+		pod              *v1.Pod
+		expectedPriority int32
+	}{
+		{
+			name: "no priority pod resolves to static default priority",
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{Containers: []v1.Container{
+					{Name: "container", Image: "image"}},
+				},
+			},
+			expectedPriority: scheduling.DefaultPriorityWhenNoDefaultClassExists,
+		},
+		{
+			name: "pod with priority resolves correctly",
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{Containers: []v1.Container{
+					{Name: "container", Image: "image"}},
+					Priority: &p,
+				},
+			},
+			expectedPriority: p,
+		},
+	}
+	for _, test := range tests {
+		if GetPodPriority(test.pod) != test.expectedPriority {
+			t.Errorf("expected pod priority: %v, got %v", test.expectedPriority, GetPodPriority(test.pod))
+		}
+
+	}
+}
+
+// TestSortableList tests SortableList by storing pods in the list and sorting
+// them by their priority.
+func TestSortableList(t *testing.T) {
+	higherPriority := func(pod1, pod2 interface{}) bool {
+		return GetPodPriority(pod1.(*v1.Pod)) > GetPodPriority(pod2.(*v1.Pod))
+	}
+	podList := SortableList{CompFunc: higherPriority}
+	// Add a few Pods with different priorities from lowest to highest priority.
+	for i := 0; i < 10; i++ {
+		var p int32 = int32(i)
+		pod := &v1.Pod{
+			Spec: v1.PodSpec{
+				Containers: []v1.Container{
+					{
+						Name:  "container",
+						Image: "image",
+					},
+				},
+				Priority: &p,
+			},
+		}
+		podList.Items = append(podList.Items, pod)
+	}
+	podList.Sort()
+	if len(podList.Items) != 10 {
+		t.Errorf("expected length of list was 10, got: %v", len(podList.Items))
+	}
+	var prevPriority = int32(10)
+	for _, p := range podList.Items {
+		if *p.(*v1.Pod).Spec.Priority >= prevPriority {
+			t.Errorf("Pods are not soreted. Current pod pririty is %v, while previous one was %v.", *p.(*v1.Pod).Spec.Priority, prevPriority)
+		}
+	}
+}