mirror of
https://github.com/ceph/ceph-csi.git
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641 lines
21 KiB
Go
641 lines
21 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package scheduler
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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policy "k8s.io/api/policy/v1beta1"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apiserver/pkg/admission"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
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"k8s.io/client-go/informers"
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coreinformers "k8s.io/client-go/informers/core/v1"
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clientset "k8s.io/client-go/kubernetes"
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clientv1core "k8s.io/client-go/kubernetes/typed/core/v1"
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corelisters "k8s.io/client-go/listers/core/v1"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/api/legacyscheme"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/disruption"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/scheduler"
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_ "k8s.io/kubernetes/pkg/scheduler/algorithmprovider"
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schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
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"k8s.io/kubernetes/pkg/scheduler/factory"
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"k8s.io/kubernetes/test/integration/framework"
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imageutils "k8s.io/kubernetes/test/utils/image"
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)
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type TestContext struct {
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closeFn framework.CloseFunc
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httpServer *httptest.Server
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ns *v1.Namespace
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clientSet *clientset.Clientset
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informerFactory informers.SharedInformerFactory
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schedulerConfigFactory scheduler.Configurator
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schedulerConfig *scheduler.Config
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scheduler *scheduler.Scheduler
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}
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// createConfiguratorWithPodInformer creates a configurator for scheduler.
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func createConfiguratorWithPodInformer(
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schedulerName string,
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clientSet clientset.Interface,
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podInformer coreinformers.PodInformer,
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informerFactory informers.SharedInformerFactory,
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) scheduler.Configurator {
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return factory.NewConfigFactory(
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schedulerName,
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clientSet,
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informerFactory.Core().V1().Nodes(),
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podInformer,
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informerFactory.Core().V1().PersistentVolumes(),
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informerFactory.Core().V1().PersistentVolumeClaims(),
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informerFactory.Core().V1().ReplicationControllers(),
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informerFactory.Extensions().V1beta1().ReplicaSets(),
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informerFactory.Apps().V1beta1().StatefulSets(),
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informerFactory.Core().V1().Services(),
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informerFactory.Policy().V1beta1().PodDisruptionBudgets(),
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informerFactory.Storage().V1().StorageClasses(),
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v1.DefaultHardPodAffinitySymmetricWeight,
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utilfeature.DefaultFeatureGate.Enabled(features.EnableEquivalenceClassCache),
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false,
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)
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}
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// initTestMasterAndScheduler initializes a test environment and creates a master with default
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// configuration.
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func initTestMaster(t *testing.T, nsPrefix string, admission admission.Interface) *TestContext {
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var context TestContext
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// 1. Create master
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h := &framework.MasterHolder{Initialized: make(chan struct{})}
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s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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<-h.Initialized
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h.M.GenericAPIServer.Handler.ServeHTTP(w, req)
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}))
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masterConfig := framework.NewIntegrationTestMasterConfig()
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if admission != nil {
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masterConfig.GenericConfig.AdmissionControl = admission
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}
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_, context.httpServer, context.closeFn = framework.RunAMasterUsingServer(masterConfig, s, h)
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if nsPrefix != "default" {
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context.ns = framework.CreateTestingNamespace(nsPrefix+string(uuid.NewUUID()), s, t)
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} else {
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context.ns = framework.CreateTestingNamespace("default", s, t)
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}
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// 2. Create kubeclient
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context.clientSet = clientset.NewForConfigOrDie(
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&restclient.Config{
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QPS: -1, Host: s.URL,
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ContentConfig: restclient.ContentConfig{
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GroupVersion: &schema.GroupVersion{Group: "", Version: "v1"},
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},
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},
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)
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return &context
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}
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// initTestScheduler initializes a test environment and creates a scheduler with default
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// configuration.
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func initTestScheduler(
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t *testing.T,
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context *TestContext,
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controllerCh chan struct{},
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setPodInformer bool,
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policy *schedulerapi.Policy,
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) *TestContext {
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// Pod preemption is enabled by default scheduler configuration, but preemption only happens when PodPriority
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// feature gate is enabled at the same time.
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return initTestSchedulerWithOptions(t, context, controllerCh, setPodInformer, policy, false)
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}
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// initTestSchedulerWithOptions initializes a test environment and creates a scheduler with default
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// configuration and other options.
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func initTestSchedulerWithOptions(
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t *testing.T,
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context *TestContext,
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controllerCh chan struct{},
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setPodInformer bool,
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policy *schedulerapi.Policy,
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disablePreemption bool,
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) *TestContext {
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// Enable EnableEquivalenceClassCache for all integration tests.
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defer utilfeaturetesting.SetFeatureGateDuringTest(
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t,
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utilfeature.DefaultFeatureGate,
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features.EnableEquivalenceClassCache, true)()
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// 1. Create scheduler
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context.informerFactory = informers.NewSharedInformerFactory(context.clientSet, time.Second)
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var podInformer coreinformers.PodInformer
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// create independent pod informer if required
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if setPodInformer {
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podInformer = factory.NewPodInformer(context.clientSet, 12*time.Hour)
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} else {
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podInformer = context.informerFactory.Core().V1().Pods()
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}
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context.schedulerConfigFactory = createConfiguratorWithPodInformer(
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v1.DefaultSchedulerName, context.clientSet, podInformer, context.informerFactory)
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var err error
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if policy != nil {
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context.schedulerConfig, err = context.schedulerConfigFactory.CreateFromConfig(*policy)
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} else {
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context.schedulerConfig, err = context.schedulerConfigFactory.Create()
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}
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if err != nil {
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t.Fatalf("Couldn't create scheduler config: %v", err)
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}
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// set controllerCh if provided.
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if controllerCh != nil {
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context.schedulerConfig.StopEverything = controllerCh
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}
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// set DisablePreemption option
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context.schedulerConfig.DisablePreemption = disablePreemption
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// set setPodInformer if provided.
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if setPodInformer {
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go podInformer.Informer().Run(context.schedulerConfig.StopEverything)
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controller.WaitForCacheSync("scheduler", context.schedulerConfig.StopEverything, podInformer.Informer().HasSynced)
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}
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eventBroadcaster := record.NewBroadcaster()
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context.schedulerConfig.Recorder = eventBroadcaster.NewRecorder(
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legacyscheme.Scheme,
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v1.EventSource{Component: v1.DefaultSchedulerName},
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)
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eventBroadcaster.StartRecordingToSink(&clientv1core.EventSinkImpl{
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Interface: context.clientSet.CoreV1().Events(""),
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})
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context.informerFactory.Start(context.schedulerConfig.StopEverything)
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context.informerFactory.WaitForCacheSync(context.schedulerConfig.StopEverything)
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context.scheduler, err = scheduler.NewFromConfigurator(&scheduler.FakeConfigurator{
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Config: context.schedulerConfig},
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nil...)
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if err != nil {
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t.Fatalf("Couldn't create scheduler: %v", err)
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}
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context.scheduler.Run()
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return context
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}
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// initDisruptionController initializes and runs a Disruption Controller to properly
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// update PodDisuptionBudget objects.
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func initDisruptionController(context *TestContext) *disruption.DisruptionController {
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informers := informers.NewSharedInformerFactory(context.clientSet, 12*time.Hour)
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dc := disruption.NewDisruptionController(
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informers.Core().V1().Pods(),
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informers.Policy().V1beta1().PodDisruptionBudgets(),
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informers.Core().V1().ReplicationControllers(),
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informers.Extensions().V1beta1().ReplicaSets(),
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informers.Extensions().V1beta1().Deployments(),
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informers.Apps().V1beta1().StatefulSets(),
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context.clientSet)
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informers.Start(context.schedulerConfig.StopEverything)
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informers.WaitForCacheSync(context.schedulerConfig.StopEverything)
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go dc.Run(context.schedulerConfig.StopEverything)
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return dc
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}
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// initTest initializes a test environment and creates master and scheduler with default
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// configuration.
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func initTest(t *testing.T, nsPrefix string) *TestContext {
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return initTestScheduler(t, initTestMaster(t, nsPrefix, nil), nil, true, nil)
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}
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// initTestDisablePreemption initializes a test environment and creates master and scheduler with default
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// configuration but with pod preemption disabled.
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func initTestDisablePreemption(t *testing.T, nsPrefix string) *TestContext {
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return initTestSchedulerWithOptions(
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t, initTestMaster(t, nsPrefix, nil), nil, true, nil, true)
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}
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// cleanupTest deletes the scheduler and the test namespace. It should be called
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// at the end of a test.
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func cleanupTest(t *testing.T, context *TestContext) {
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// Kill the scheduler.
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close(context.schedulerConfig.StopEverything)
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// Cleanup nodes.
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context.clientSet.CoreV1().Nodes().DeleteCollection(nil, metav1.ListOptions{})
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framework.DeleteTestingNamespace(context.ns, context.httpServer, t)
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context.closeFn()
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}
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// waitForReflection waits till the passFunc confirms that the object it expects
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// to see is in the store. Used to observe reflected events.
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func waitForReflection(t *testing.T, nodeLister corelisters.NodeLister, key string,
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passFunc func(n interface{}) bool) error {
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nodes := []*v1.Node{}
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err := wait.Poll(time.Millisecond*100, wait.ForeverTestTimeout, func() (bool, error) {
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n, err := nodeLister.Get(key)
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switch {
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case err == nil && passFunc(n):
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return true, nil
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case errors.IsNotFound(err):
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nodes = append(nodes, nil)
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case err != nil:
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t.Errorf("Unexpected error: %v", err)
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default:
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nodes = append(nodes, n)
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}
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return false, nil
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})
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if err != nil {
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t.Logf("Logging consecutive node versions received from store:")
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for i, n := range nodes {
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t.Logf("%d: %#v", i, n)
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}
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}
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return err
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}
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// nodeHasLabels returns a function that checks if a node has all the given labels.
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func nodeHasLabels(cs clientset.Interface, nodeName string, labels map[string]string) wait.ConditionFunc {
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return func() (bool, error) {
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node, err := cs.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{})
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if errors.IsNotFound(err) {
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return false, nil
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}
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if err != nil {
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// This could be a connection error so we want to retry.
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return false, nil
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}
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for k, v := range labels {
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if node.Labels == nil || node.Labels[k] != v {
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return false, nil
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}
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}
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return true, nil
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}
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}
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// waitForNodeLabels waits for the given node to have all the given labels.
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func waitForNodeLabels(cs clientset.Interface, nodeName string, labels map[string]string) error {
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return wait.Poll(time.Millisecond*100, wait.ForeverTestTimeout, nodeHasLabels(cs, nodeName, labels))
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}
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// createNode creates a node with the given resource list and
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// returns a pointer and error status. If 'res' is nil, a predefined amount of
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// resource will be used.
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func createNode(cs clientset.Interface, name string, res *v1.ResourceList) (*v1.Node, error) {
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// if resource is nil, we use a default amount of resources for the node.
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if res == nil {
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res = &v1.ResourceList{
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v1.ResourcePods: *resource.NewQuantity(32, resource.DecimalSI),
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}
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}
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n := &v1.Node{
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ObjectMeta: metav1.ObjectMeta{Name: name},
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Spec: v1.NodeSpec{Unschedulable: false},
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Status: v1.NodeStatus{
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Capacity: *res,
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},
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}
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return cs.CoreV1().Nodes().Create(n)
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}
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// updateNodeStatus updates the status of node.
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func updateNodeStatus(cs clientset.Interface, node *v1.Node) error {
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_, err := cs.CoreV1().Nodes().UpdateStatus(node)
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return err
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}
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// createNodes creates `numNodes` nodes. The created node names will be in the
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// form of "`prefix`-X" where X is an ordinal.
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func createNodes(cs clientset.Interface, prefix string, res *v1.ResourceList, numNodes int) ([]*v1.Node, error) {
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nodes := make([]*v1.Node, numNodes)
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for i := 0; i < numNodes; i++ {
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nodeName := fmt.Sprintf("%v-%d", prefix, i)
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node, err := createNode(cs, nodeName, res)
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if err != nil {
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return nodes[:], err
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}
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nodes[i] = node
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}
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return nodes[:], nil
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}
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type pausePodConfig struct {
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Name string
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Namespace string
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Affinity *v1.Affinity
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Annotations, Labels, NodeSelector map[string]string
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Resources *v1.ResourceRequirements
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Tolerations []v1.Toleration
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NodeName string
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SchedulerName string
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Priority *int32
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}
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// initPausePod initializes a pod API object from the given config. It is used
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// mainly in pod creation process.
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func initPausePod(cs clientset.Interface, conf *pausePodConfig) *v1.Pod {
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: conf.Name,
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Namespace: conf.Namespace,
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Labels: conf.Labels,
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Annotations: conf.Annotations,
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},
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Spec: v1.PodSpec{
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NodeSelector: conf.NodeSelector,
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Affinity: conf.Affinity,
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Containers: []v1.Container{
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{
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Name: conf.Name,
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Image: imageutils.GetPauseImageName(),
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},
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},
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Tolerations: conf.Tolerations,
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NodeName: conf.NodeName,
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SchedulerName: conf.SchedulerName,
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Priority: conf.Priority,
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},
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}
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if conf.Resources != nil {
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pod.Spec.Containers[0].Resources = *conf.Resources
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}
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return pod
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}
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// createPausePod creates a pod with "Pause" image and the given config and
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// return its pointer and error status.
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func createPausePod(cs clientset.Interface, p *v1.Pod) (*v1.Pod, error) {
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return cs.CoreV1().Pods(p.Namespace).Create(p)
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}
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// createPausePodWithResource creates a pod with "Pause" image and the given
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// resources and returns its pointer and error status. The resource list can be
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// nil.
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func createPausePodWithResource(cs clientset.Interface, podName string,
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nsName string, res *v1.ResourceList) (*v1.Pod, error) {
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var conf pausePodConfig
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if res == nil {
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conf = pausePodConfig{
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Name: podName,
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Namespace: nsName,
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}
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} else {
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conf = pausePodConfig{
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Name: podName,
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Namespace: nsName,
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Resources: &v1.ResourceRequirements{
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Requests: *res,
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},
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}
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}
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return createPausePod(cs, initPausePod(cs, &conf))
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}
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// runPausePod creates a pod with "Pause" image and the given config and waits
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// until it is scheduled. It returns its pointer and error status.
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func runPausePod(cs clientset.Interface, pod *v1.Pod) (*v1.Pod, error) {
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pod, err := cs.CoreV1().Pods(pod.Namespace).Create(pod)
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if err != nil {
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return nil, fmt.Errorf("Error creating pause pod: %v", err)
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}
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if err = waitForPodToSchedule(cs, pod); err != nil {
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return pod, fmt.Errorf("Pod %v didn't schedule successfully. Error: %v", pod.Name, err)
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}
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if pod, err = cs.CoreV1().Pods(pod.Namespace).Get(pod.Name, metav1.GetOptions{}); err != nil {
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return pod, fmt.Errorf("Error getting pod %v info: %v", pod.Name, err)
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}
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return pod, nil
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}
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// podDeleted returns true if a pod is not found in the given namespace.
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func podDeleted(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
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return func() (bool, error) {
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pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
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if errors.IsNotFound(err) {
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return true, nil
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}
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if pod.DeletionTimestamp != nil {
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return true, nil
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}
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return false, nil
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}
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}
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// podIsGettingEvicted returns true if the pod's deletion timestamp is set.
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func podIsGettingEvicted(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
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return func() (bool, error) {
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pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
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if err != nil {
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return false, err
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}
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if pod.DeletionTimestamp != nil {
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return true, nil
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}
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return false, nil
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}
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}
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// podScheduled returns true if a node is assigned to the given pod.
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func podScheduled(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
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return func() (bool, error) {
|
|
pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
|
|
if errors.IsNotFound(err) {
|
|
return false, nil
|
|
}
|
|
if err != nil {
|
|
// This could be a connection error so we want to retry.
|
|
return false, nil
|
|
}
|
|
if pod.Spec.NodeName == "" {
|
|
return false, nil
|
|
}
|
|
return true, nil
|
|
}
|
|
}
|
|
|
|
// podUnschedulable returns a condition function that returns true if the given pod
|
|
// gets unschedulable status.
|
|
func podUnschedulable(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
|
|
return func() (bool, error) {
|
|
pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
|
|
if errors.IsNotFound(err) {
|
|
return false, nil
|
|
}
|
|
if err != nil {
|
|
// This could be a connection error so we want to retry.
|
|
return false, nil
|
|
}
|
|
_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
|
|
return cond != nil && cond.Status == v1.ConditionFalse &&
|
|
cond.Reason == v1.PodReasonUnschedulable, nil
|
|
}
|
|
}
|
|
|
|
// waitForPodToScheduleWithTimeout waits for a pod to get scheduled and returns
|
|
// an error if it does not scheduled within the given timeout.
|
|
func waitForPodToScheduleWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
|
|
return wait.Poll(100*time.Millisecond, timeout, podScheduled(cs, pod.Namespace, pod.Name))
|
|
}
|
|
|
|
// waitForPodToSchedule waits for a pod to get scheduled and returns an error if
|
|
// it does not get scheduled within the timeout duration (30 seconds).
|
|
func waitForPodToSchedule(cs clientset.Interface, pod *v1.Pod) error {
|
|
return waitForPodToScheduleWithTimeout(cs, pod, 30*time.Second)
|
|
}
|
|
|
|
// waitForPodUnscheduleWithTimeout waits for a pod to fail scheduling and returns
|
|
// an error if it does not become unschedulable within the given timeout.
|
|
func waitForPodUnschedulableWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
|
|
return wait.Poll(100*time.Millisecond, timeout, podUnschedulable(cs, pod.Namespace, pod.Name))
|
|
}
|
|
|
|
// waitForPodUnschedule waits for a pod to fail scheduling and returns
|
|
// an error if it does not become unschedulable within the timeout duration (30 seconds).
|
|
func waitForPodUnschedulable(cs clientset.Interface, pod *v1.Pod) error {
|
|
return waitForPodUnschedulableWithTimeout(cs, pod, 30*time.Second)
|
|
}
|
|
|
|
// waitCachedPDBsStable waits for PDBs in scheduler cache to have "CurrentHealthy" status equal to
|
|
// the expected values.
|
|
func waitCachedPDBsStable(context *TestContext, pdbs []*policy.PodDisruptionBudget, pdbPodNum []int32) error {
|
|
return wait.Poll(time.Second, 60*time.Second, func() (bool, error) {
|
|
cachedPDBs, err := context.scheduler.Config().SchedulerCache.ListPDBs(labels.Everything())
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if len(cachedPDBs) != len(pdbs) {
|
|
return false, nil
|
|
}
|
|
for i, pdb := range pdbs {
|
|
found := false
|
|
for _, cpdb := range cachedPDBs {
|
|
if pdb.Name == cpdb.Name && pdb.Namespace == cpdb.Namespace {
|
|
found = true
|
|
if cpdb.Status.CurrentHealthy != pdbPodNum[i] {
|
|
return false, nil
|
|
}
|
|
}
|
|
}
|
|
if !found {
|
|
return false, nil
|
|
}
|
|
}
|
|
return true, nil
|
|
})
|
|
}
|
|
|
|
// waitCachedPodsStable waits until scheduler cache has the given pods.
|
|
func waitCachedPodsStable(context *TestContext, pods []*v1.Pod) error {
|
|
return wait.Poll(time.Second, 30*time.Second, func() (bool, error) {
|
|
cachedPods, err := context.scheduler.Config().SchedulerCache.List(labels.Everything())
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if len(pods) != len(cachedPods) {
|
|
return false, nil
|
|
}
|
|
for _, p := range pods {
|
|
actualPod, err1 := context.clientSet.CoreV1().Pods(p.Namespace).Get(p.Name, metav1.GetOptions{})
|
|
if err1 != nil {
|
|
return false, err1
|
|
}
|
|
cachedPod, err2 := context.scheduler.Config().SchedulerCache.GetPod(actualPod)
|
|
if err2 != nil || cachedPod == nil {
|
|
return false, err2
|
|
}
|
|
}
|
|
return true, nil
|
|
})
|
|
}
|
|
|
|
// deletePod deletes the given pod in the given namespace.
|
|
func deletePod(cs clientset.Interface, podName string, nsName string) error {
|
|
return cs.CoreV1().Pods(nsName).Delete(podName, metav1.NewDeleteOptions(0))
|
|
}
|
|
|
|
// cleanupPods deletes the given pods and waits for them to be actually deleted.
|
|
func cleanupPods(cs clientset.Interface, t *testing.T, pods []*v1.Pod) {
|
|
for _, p := range pods {
|
|
err := cs.CoreV1().Pods(p.Namespace).Delete(p.Name, metav1.NewDeleteOptions(0))
|
|
if err != nil && !errors.IsNotFound(err) {
|
|
t.Errorf("error while deleting pod %v/%v: %v", p.Namespace, p.Name, err)
|
|
}
|
|
}
|
|
for _, p := range pods {
|
|
if err := wait.Poll(time.Second, wait.ForeverTestTimeout,
|
|
podDeleted(cs, p.Namespace, p.Name)); err != nil {
|
|
t.Errorf("error while waiting for pod %v/%v to get deleted: %v", p.Namespace, p.Name, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// noPodsInNamespace returns true if no pods in the given namespace.
|
|
func noPodsInNamespace(c clientset.Interface, podNamespace string) wait.ConditionFunc {
|
|
return func() (bool, error) {
|
|
pods, err := c.CoreV1().Pods(podNamespace).List(metav1.ListOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
return len(pods.Items) == 0, nil
|
|
}
|
|
}
|
|
|
|
// cleanupPodsInNamespace deletes the pods in the given namespace and waits for them to
|
|
// be actually deleted.
|
|
func cleanupPodsInNamespace(cs clientset.Interface, t *testing.T, ns string) {
|
|
if err := cs.CoreV1().Pods(ns).DeleteCollection(nil, metav1.ListOptions{}); err != nil {
|
|
t.Errorf("error while listing pod in namespace %v: %v", ns, err)
|
|
return
|
|
}
|
|
|
|
if err := wait.Poll(time.Second, wait.ForeverTestTimeout,
|
|
noPodsInNamespace(cs, ns)); err != nil {
|
|
t.Errorf("error while waiting for pods in namespace %v: %v", ns, err)
|
|
}
|
|
}
|