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298 lines
9.6 KiB
Go
298 lines
9.6 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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// This file tests the Taint feature.
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import (
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"net/http"
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"net/http/httptest"
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"reflect"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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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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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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internalinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
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"k8s.io/kubernetes/pkg/controller/nodelifecycle"
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kubeadmission "k8s.io/kubernetes/pkg/kubeapiserver/admission"
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"k8s.io/kubernetes/pkg/scheduler"
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"k8s.io/kubernetes/pkg/scheduler/algorithm"
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"k8s.io/kubernetes/pkg/scheduler/algorithmprovider"
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"k8s.io/kubernetes/pkg/scheduler/factory"
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"k8s.io/kubernetes/plugin/pkg/admission/podtolerationrestriction"
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pluginapi "k8s.io/kubernetes/plugin/pkg/admission/podtolerationrestriction/apis/podtolerationrestriction"
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"k8s.io/kubernetes/test/integration/framework"
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)
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// TestTaintNodeByCondition verifies:
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// 1. MemoryPressure Toleration is added to non-BestEffort Pod by PodTolerationRestriction
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// 2. NodeController taints nodes by node condition
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// 3. Scheduler allows pod to tolerate node condition taints, e.g. network unavailable
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func TestTaintNodeByCondition(t *testing.T) {
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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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// Enable TaintNodeByCondition
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utilfeature.DefaultFeatureGate.Set("TaintNodesByCondition=True")
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// Build clientset and informers for controllers.
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internalClientset := internalclientset.NewForConfigOrDie(&restclient.Config{QPS: -1, Host: s.URL, ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Groups[v1.GroupName].GroupVersion()}})
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internalInformers := internalinformers.NewSharedInformerFactory(internalClientset, time.Second)
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clientset := clientset.NewForConfigOrDie(&restclient.Config{QPS: -1, Host: s.URL, ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Groups[v1.GroupName].GroupVersion()}})
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informers := informers.NewSharedInformerFactory(clientset, time.Second)
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// Build PodToleration Admission.
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admission := podtolerationrestriction.NewPodTolerationsPlugin(&pluginapi.Configuration{})
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kubeadmission.WantsInternalKubeClientSet(admission).SetInternalKubeClientSet(internalClientset)
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kubeadmission.WantsInternalKubeInformerFactory(admission).SetInternalKubeInformerFactory(internalInformers)
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// Start master with admission.
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masterConfig := framework.NewIntegrationTestMasterConfig()
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masterConfig.GenericConfig.AdmissionControl = admission
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_, _, closeFn := framework.RunAMasterUsingServer(masterConfig, s, h)
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defer closeFn()
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nsName := "default"
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controllerCh := make(chan struct{})
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defer close(controllerCh)
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// Start NodeLifecycleController for taint.
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nc, err := nodelifecycle.NewNodeLifecycleController(
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informers.Core().V1().Pods(),
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informers.Core().V1().Nodes(),
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informers.Extensions().V1beta1().DaemonSets(),
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nil, // CloudProvider
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clientset,
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time.Second, // Node monitor grace period
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time.Second, // Node startup grace period
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time.Second, // Node monitor period
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time.Second, // Pod eviction timeout
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100, // Eviction limiter QPS
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100, // Secondary eviction limiter QPS
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100, // Large cluster threshold
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100, // Unhealthy zone threshold
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true, // Run taint manager
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true, // Use taint based evictions
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true, // Enabled TaintNodeByCondition feature
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)
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if err != nil {
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t.Errorf("Failed to create node controller: %v", err)
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return
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}
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go nc.Run(controllerCh)
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// Apply feature gates to enable TaintNodesByCondition
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algorithmprovider.ApplyFeatureGates()
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// Start scheduler
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configurator := factory.NewConfigFactory(
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v1.DefaultSchedulerName,
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clientset,
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informers.Core().V1().Nodes(),
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informers.Core().V1().Pods(),
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informers.Core().V1().PersistentVolumes(),
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informers.Core().V1().PersistentVolumeClaims(),
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informers.Core().V1().ReplicationControllers(),
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informers.Extensions().V1beta1().ReplicaSets(),
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informers.Apps().V1beta1().StatefulSets(),
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informers.Core().V1().Services(),
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informers.Policy().V1beta1().PodDisruptionBudgets(),
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informers.Storage().V1().StorageClasses(),
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v1.DefaultHardPodAffinitySymmetricWeight,
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true, // Enable EqualCache by default.
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)
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sched, err := scheduler.NewFromConfigurator(configurator, func(cfg *scheduler.Config) {
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cfg.StopEverything = controllerCh
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cfg.Recorder = &record.FakeRecorder{}
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})
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if err != nil {
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t.Errorf("Failed to create scheduler: %v.", err)
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return
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}
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go sched.Run()
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// Waiting for all controller sync.
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informers.Start(controllerCh)
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internalInformers.Start(controllerCh)
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informers.WaitForCacheSync(controllerCh)
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internalInformers.WaitForCacheSync(controllerCh)
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// -------------------------------------------
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// Test TaintNodeByCondition feature.
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// -------------------------------------------
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memoryPressureToleration := v1.Toleration{
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Key: algorithm.TaintNodeMemoryPressure,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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}
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// Case 1: Add MememoryPressure Toleration for non-BestEffort pod.
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burstablePod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "burstable-pod",
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Namespace: nsName,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "busybox",
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Image: "busybox",
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("100m"),
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},
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},
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},
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},
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},
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}
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burstablePodInServ, err := clientset.CoreV1().Pods(nsName).Create(burstablePod)
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if err != nil {
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t.Errorf("Case 1: Failed to create pod: %v", err)
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} else if !reflect.DeepEqual(burstablePodInServ.Spec.Tolerations, []v1.Toleration{memoryPressureToleration}) {
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t.Errorf("Case 1: Unexpected toleration of non-BestEffort pod, expected: %+v, got: %v",
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[]v1.Toleration{memoryPressureToleration},
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burstablePodInServ.Spec.Tolerations)
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}
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// Case 2: No MemoryPressure Toleration for BestEffort pod.
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besteffortPod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "best-effort-pod",
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Namespace: nsName,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "busybox",
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Image: "busybox",
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},
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},
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},
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}
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besteffortPodInServ, err := clientset.CoreV1().Pods(nsName).Create(besteffortPod)
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if err != nil {
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t.Errorf("Case 2: Failed to create pod: %v", err)
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} else if len(besteffortPodInServ.Spec.Tolerations) != 0 {
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t.Errorf("Case 2: Unexpected toleration # of BestEffort pod, expected: 0, got: %v",
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len(besteffortPodInServ.Spec.Tolerations))
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}
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// Case 3: Taint Node by NetworkUnavailable condition.
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networkUnavailableNode := &v1.Node{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-1",
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},
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Status: v1.NodeStatus{
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Capacity: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("4000m"),
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v1.ResourceMemory: resource.MustParse("16Gi"),
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v1.ResourcePods: resource.MustParse("110"),
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},
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Allocatable: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("4000m"),
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v1.ResourceMemory: resource.MustParse("16Gi"),
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v1.ResourcePods: resource.MustParse("110"),
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},
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Conditions: []v1.NodeCondition{
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{
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Type: v1.NodeNetworkUnavailable,
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Status: v1.ConditionTrue,
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},
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{
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Type: v1.NodeReady,
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Status: v1.ConditionFalse,
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},
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},
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},
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}
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nodeInformerCh := make(chan bool)
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nodeInformer := informers.Core().V1().Nodes().Informer()
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nodeInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
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UpdateFunc: func(old, cur interface{}) {
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curNode := cur.(*v1.Node)
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for _, taint := range curNode.Spec.Taints {
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if taint.Key == algorithm.TaintNodeNetworkUnavailable &&
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taint.Effect == v1.TaintEffectNoSchedule {
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nodeInformerCh <- true
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break
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}
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}
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},
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})
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if _, err := clientset.CoreV1().Nodes().Create(networkUnavailableNode); err != nil {
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t.Errorf("Case 3: Failed to create node: %v", err)
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} else {
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select {
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case <-time.After(60 * time.Second):
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t.Errorf("Case 3: Failed to taint node after 60s.")
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case <-nodeInformerCh:
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}
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}
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// Case 4: Schedule Pod with NetworkUnavailable toleration.
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networkDaemonPod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "network-daemon-pod",
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Namespace: nsName,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "busybox",
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Image: "busybox",
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},
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},
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Tolerations: []v1.Toleration{
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{
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Key: algorithm.TaintNodeNetworkUnavailable,
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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},
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},
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},
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}
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if _, err := clientset.CoreV1().Pods(nsName).Create(networkDaemonPod); err != nil {
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t.Errorf("Case 4: Failed to create pod for network daemon: %v", err)
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} else {
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if err := waitForPodToScheduleWithTimeout(clientset, networkDaemonPod, time.Second*60); err != nil {
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t.Errorf("Case 4: Failed to schedule network daemon pod in 60s.")
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}
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}
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}
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