mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 13:29:11 +01:00
249 lines
9.7 KiB
Go
249 lines
9.7 KiB
Go
/*
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Copyright 2021 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 e2e
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import (
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"context"
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"os"
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"strings"
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"testing"
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"time"
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appsv1 "k8s.io/api/apps/v1"
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v1 "k8s.io/api/core/v1"
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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"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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clientset "k8s.io/client-go/kubernetes"
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componentbaseconfig "k8s.io/component-base/config"
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"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
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"sigs.k8s.io/descheduler/pkg/api"
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apiv1alpha2 "sigs.k8s.io/descheduler/pkg/api/v1alpha2"
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"sigs.k8s.io/descheduler/pkg/descheduler/client"
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"sigs.k8s.io/descheduler/pkg/framework/plugins/defaultevictor"
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"sigs.k8s.io/descheduler/pkg/framework/plugins/removepodshavingtoomanyrestarts"
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)
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const deploymentReplicas = 4
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func tooManyRestartsPolicy(targetNamespace string, podRestartThresholds int32, includingInitContainers bool, gracePeriodSeconds int64) *apiv1alpha2.DeschedulerPolicy {
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return &apiv1alpha2.DeschedulerPolicy{
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Profiles: []apiv1alpha2.DeschedulerProfile{
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{
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Name: "TooManyRestartsProfile",
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PluginConfigs: []apiv1alpha2.PluginConfig{
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{
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Name: removepodshavingtoomanyrestarts.PluginName,
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Args: runtime.RawExtension{
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Object: &removepodshavingtoomanyrestarts.RemovePodsHavingTooManyRestartsArgs{
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PodRestartThreshold: podRestartThresholds,
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IncludingInitContainers: includingInitContainers,
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Namespaces: &api.Namespaces{
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Include: []string{targetNamespace},
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},
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},
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},
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},
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{
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Name: defaultevictor.PluginName,
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Args: runtime.RawExtension{
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Object: &defaultevictor.DefaultEvictorArgs{
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EvictLocalStoragePods: true,
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},
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},
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},
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},
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Plugins: apiv1alpha2.Plugins{
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Filter: apiv1alpha2.PluginSet{
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Enabled: []string{
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defaultevictor.PluginName,
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},
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},
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Deschedule: apiv1alpha2.PluginSet{
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Enabled: []string{
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removepodshavingtoomanyrestarts.PluginName,
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},
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},
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},
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},
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},
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GracePeriodSeconds: &gracePeriodSeconds,
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}
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}
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func TestTooManyRestarts(t *testing.T) {
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ctx := context.Background()
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initPluginRegistry()
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clientSet, err := client.CreateClient(componentbaseconfig.ClientConnectionConfiguration{Kubeconfig: os.Getenv("KUBECONFIG")}, "")
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if err != nil {
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t.Errorf("Error during kubernetes client creation with %v", err)
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}
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t.Logf("Creating testing namespace %v", t.Name())
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testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
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if _, err := clientSet.CoreV1().Namespaces().Create(ctx, testNamespace, metav1.CreateOptions{}); err != nil {
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t.Fatalf("Unable to create ns %v", testNamespace.Name)
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}
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defer clientSet.CoreV1().Namespaces().Delete(ctx, testNamespace.Name, metav1.DeleteOptions{})
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deploymentObj := buildTestDeployment("restart-pod", testNamespace.Name, deploymentReplicas, map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"}, func(deployment *appsv1.Deployment) {
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deployment.Spec.Template.Spec.Containers[0].Command = []string{"/bin/sh"}
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deployment.Spec.Template.Spec.Containers[0].Args = []string{"-c", "sleep 1s && exit 1"}
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})
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t.Logf("Creating deployment %v", deploymentObj.Name)
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_, err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).Create(ctx, deploymentObj, metav1.CreateOptions{})
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if err != nil {
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t.Logf("Error creating deployment: %v", err)
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if err = clientSet.AppsV1().Deployments(deploymentObj.Namespace).DeleteCollection(ctx, metav1.DeleteOptions{}, metav1.ListOptions{
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LabelSelector: labels.SelectorFromSet(labels.Set(map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"})).String(),
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}); err != nil {
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t.Fatalf("Unable to delete deployment: %v", err)
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}
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return
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}
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defer clientSet.AppsV1().Deployments(deploymentObj.Namespace).Delete(ctx, deploymentObj.Name, metav1.DeleteOptions{})
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// Wait for 3 restarts
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waitPodRestartCount(ctx, clientSet, testNamespace.Name, t, 3)
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tests := []struct {
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name string
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policy *apiv1alpha2.DeschedulerPolicy
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enableGracePeriod bool
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expectedEvictedPodCount uint
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}{
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{
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name: "test-no-evictions",
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policy: tooManyRestartsPolicy(testNamespace.Name, 10000, true, 0),
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expectedEvictedPodCount: 0,
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},
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{
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name: "test-one-evictions",
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policy: tooManyRestartsPolicy(testNamespace.Name, 3, true, 0),
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expectedEvictedPodCount: 4,
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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rs, err := options.NewDeschedulerServer()
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if err != nil {
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t.Fatalf("Unable to initialize server: %v\n", err)
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}
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rs.Client = clientSet
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rs.EventClient = clientSet
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rs.DefaultFeatureGates = initFeatureGates()
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preRunNames := sets.NewString(getCurrentPodNames(ctx, clientSet, testNamespace.Name, t)...)
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// Deploy the descheduler with the configured policy
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deschedulerPolicyConfigMapObj, err := deschedulerPolicyConfigMap(tc.policy)
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if err != nil {
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t.Fatalf("Error creating %q CM: %v", deschedulerPolicyConfigMapObj.Name, err)
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}
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t.Logf("Creating %q policy CM with RemovePodsHavingTooManyRestarts configured...", deschedulerPolicyConfigMapObj.Name)
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_, err = clientSet.CoreV1().ConfigMaps(deschedulerPolicyConfigMapObj.Namespace).Create(ctx, deschedulerPolicyConfigMapObj, metav1.CreateOptions{})
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if err != nil {
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t.Fatalf("Error creating %q CM: %v", deschedulerPolicyConfigMapObj.Name, err)
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}
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defer func() {
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t.Logf("Deleting %q CM...", deschedulerPolicyConfigMapObj.Name)
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err = clientSet.CoreV1().ConfigMaps(deschedulerPolicyConfigMapObj.Namespace).Delete(ctx, deschedulerPolicyConfigMapObj.Name, metav1.DeleteOptions{})
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if err != nil {
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t.Fatalf("Unable to delete %q CM: %v", deschedulerPolicyConfigMapObj.Name, err)
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}
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}()
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deschedulerDeploymentObj := deschedulerDeployment(testNamespace.Name)
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t.Logf("Creating descheduler deployment %v", deschedulerDeploymentObj.Name)
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_, err = clientSet.AppsV1().Deployments(deschedulerDeploymentObj.Namespace).Create(ctx, deschedulerDeploymentObj, metav1.CreateOptions{})
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if err != nil {
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t.Fatalf("Error creating %q deployment: %v", deschedulerDeploymentObj.Name, err)
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}
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deschedulerPodName := ""
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defer func() {
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if deschedulerPodName != "" {
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printPodLogs(ctx, t, clientSet, deschedulerPodName)
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}
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t.Logf("Deleting %q deployment...", deschedulerDeploymentObj.Name)
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err = clientSet.AppsV1().Deployments(deschedulerDeploymentObj.Namespace).Delete(ctx, deschedulerDeploymentObj.Name, metav1.DeleteOptions{})
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if err != nil {
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t.Fatalf("Unable to delete %q deployment: %v", deschedulerDeploymentObj.Name, err)
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}
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waitForPodsToDisappear(ctx, t, clientSet, deschedulerDeploymentObj.Labels, deschedulerDeploymentObj.Namespace)
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}()
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t.Logf("Waiting for the descheduler pod running")
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deschedulerPods := waitForPodsRunning(ctx, t, clientSet, deschedulerDeploymentObj.Labels, 1, deschedulerDeploymentObj.Namespace)
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if len(deschedulerPods) != 0 {
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deschedulerPodName = deschedulerPods[0].Name
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}
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// Run RemovePodsHavingTooManyRestarts strategy
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if err := wait.PollUntilContextTimeout(ctx, 1*time.Second, 50*time.Second, true, func(ctx context.Context) (bool, error) {
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currentRunNames := sets.NewString(getCurrentPodNames(ctx, clientSet, testNamespace.Name, t)...)
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actualEvictedPod := preRunNames.Difference(currentRunNames)
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actualEvictedPodCount := uint(actualEvictedPod.Len())
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t.Logf("preRunNames: %v, currentRunNames: %v, actualEvictedPodCount: %v\n", preRunNames.List(), currentRunNames.List(), actualEvictedPodCount)
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if actualEvictedPodCount < tc.expectedEvictedPodCount {
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t.Logf("Expecting %v number of pods evicted, got %v instead", tc.expectedEvictedPodCount, actualEvictedPodCount)
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return false, nil
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}
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return true, nil
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}); err != nil {
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t.Fatalf("Error waiting for descheduler running: %v", err)
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}
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waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
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})
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}
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}
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func waitPodRestartCount(ctx context.Context, clientSet clientset.Interface, namespace string, t *testing.T, expectedNumberOfRestarts int) {
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if err := wait.PollUntilContextTimeout(ctx, 5*time.Second, 5*time.Minute, true, func(ctx context.Context) (bool, error) {
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podList, err := clientSet.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{
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LabelSelector: labels.SelectorFromSet(labels.Set(map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"})).String(),
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})
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if err != nil {
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t.Fatalf("Unexpected err: %v", err)
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return false, err
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}
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if len(podList.Items) < expectedNumberOfRestarts {
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t.Log("Waiting for 4 pods")
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return false, nil
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}
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for i := 0; i < 4; i++ {
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if len(podList.Items[i].Status.ContainerStatuses) < 1 {
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t.Logf("Waiting for podList.Items[%v].Status.ContainerStatuses to be populated", i)
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return false, nil
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}
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if podList.Items[i].Status.ContainerStatuses[0].RestartCount < int32(expectedNumberOfRestarts) {
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t.Logf("podList.Items[%v].Status.ContainerStatuses[0].RestartCount (%v) < %v", i, podList.Items[i].Status.ContainerStatuses[0].RestartCount, expectedNumberOfRestarts)
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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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}); err != nil {
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t.Fatalf("Error waiting for a workload running: %v", err)
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}
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}
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