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867be8fc3e
It's conceptually wrong to have dependencies to k/k/pkg in the e2e framework code. They should be moved to corresponding packages, in this particular case to the test/e2e_node.
401 lines
20 KiB
Go
401 lines
20 KiB
Go
/*
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Copyright 2020 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 e2enode
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"time"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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"github.com/onsi/gomega/gstruct"
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"github.com/prometheus/common/model"
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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/types"
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"k8s.io/apimachinery/pkg/util/uuid"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/kubernetes/test/e2e/framework"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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imageutils "k8s.io/kubernetes/test/utils/image"
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admissionapi "k8s.io/pod-security-admission/api"
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)
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var _ = SIGDescribe("MirrorPodWithGracePeriod", func() {
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f := framework.NewDefaultFramework("mirror-pod-with-grace-period")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelBaseline
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ginkgo.Context("when create a mirror pod ", func() {
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var ns, podPath, staticPodName, mirrorPodName string
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ginkgo.BeforeEach(func(ctx context.Context) {
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ns = f.Namespace.Name
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staticPodName = "graceful-pod-" + string(uuid.NewUUID())
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mirrorPodName = staticPodName + "-" + framework.TestContext.NodeName
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podPath = kubeletCfg.StaticPodPath
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ginkgo.By("create the static pod")
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err := createStaticPodWithGracePeriod(podPath, staticPodName, ns)
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framework.ExpectNoError(err)
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ginkgo.By("wait for the mirror pod to be running")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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return checkMirrorPodRunning(ctx, f.ClientSet, mirrorPodName, ns)
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}, 2*time.Minute, time.Second*4).Should(gomega.BeNil())
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})
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ginkgo.It("mirror pod termination should satisfy grace period when static pod is deleted [NodeConformance]", func(ctx context.Context) {
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ginkgo.By("get mirror pod uid")
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pod, err := f.ClientSet.CoreV1().Pods(ns).Get(ctx, mirrorPodName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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uid := pod.UID
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ginkgo.By("delete the static pod")
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file := staticPodPath(podPath, staticPodName, ns)
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framework.Logf("deleting static pod manifest %q", file)
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err = os.Remove(file)
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framework.ExpectNoError(err)
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ginkgo.By("wait for the mirror pod to be running for grace period")
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gomega.Consistently(ctx, func(ctx context.Context) error {
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return checkMirrorPodRunningWithUID(ctx, f.ClientSet, mirrorPodName, ns, uid)
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}, 19*time.Second, 200*time.Millisecond).Should(gomega.BeNil())
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})
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ginkgo.It("mirror pod termination should satisfy grace period when static pod is updated [NodeConformance]", func(ctx context.Context) {
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ginkgo.By("get mirror pod uid")
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pod, err := f.ClientSet.CoreV1().Pods(ns).Get(ctx, mirrorPodName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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uid := pod.UID
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ginkgo.By("update the static pod container image")
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image := imageutils.GetPauseImageName()
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err = createStaticPod(podPath, staticPodName, ns, image, v1.RestartPolicyAlways)
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framework.ExpectNoError(err)
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ginkgo.By("wait for the mirror pod to be running for grace period")
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gomega.Consistently(ctx, func(ctx context.Context) error {
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return checkMirrorPodRunningWithUID(ctx, f.ClientSet, mirrorPodName, ns, uid)
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}, 19*time.Second, 200*time.Millisecond).Should(gomega.BeNil())
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ginkgo.By("wait for the mirror pod to be updated")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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return checkMirrorPodRecreatedAndRunning(ctx, f.ClientSet, mirrorPodName, ns, uid)
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}, 2*time.Minute, time.Second*4).Should(gomega.BeNil())
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ginkgo.By("check the mirror pod container image is updated")
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pod, err = f.ClientSet.CoreV1().Pods(ns).Get(ctx, mirrorPodName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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framework.ExpectEqual(len(pod.Spec.Containers), 1)
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framework.ExpectEqual(pod.Spec.Containers[0].Image, image)
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})
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ginkgo.It("should update a static pod when the static pod is updated multiple times during the graceful termination period [NodeConformance]", func(ctx context.Context) {
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ginkgo.By("get mirror pod uid")
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pod, err := f.ClientSet.CoreV1().Pods(ns).Get(ctx, mirrorPodName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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uid := pod.UID
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ginkgo.By("update the pod manifest multiple times during the graceful termination period")
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for i := 0; i < 300; i++ {
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err = createStaticPod(podPath, staticPodName, ns,
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fmt.Sprintf("image-%d", i), v1.RestartPolicyAlways)
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framework.ExpectNoError(err)
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time.Sleep(100 * time.Millisecond)
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}
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image := imageutils.GetPauseImageName()
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err = createStaticPod(podPath, staticPodName, ns, image, v1.RestartPolicyAlways)
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framework.ExpectNoError(err)
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ginkgo.By("wait for the mirror pod to be updated")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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return checkMirrorPodRecreatedAndRunning(ctx, f.ClientSet, mirrorPodName, ns, uid)
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}, 2*time.Minute, time.Second*4).Should(gomega.BeNil())
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ginkgo.By("check the mirror pod container image is updated")
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pod, err = f.ClientSet.CoreV1().Pods(ns).Get(ctx, mirrorPodName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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framework.ExpectEqual(len(pod.Spec.Containers), 1)
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framework.ExpectEqual(pod.Spec.Containers[0].Image, image)
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})
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ginkgo.Context("and the container runtime is temporarily down during pod termination [NodeConformance] [Serial] [Disruptive]", func() {
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ginkgo.BeforeEach(func(ctx context.Context) {
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// Ensure that prior to the test starting, no other pods are running or in the process of being terminated other than the mirror pod.
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// This is necessary as the test verifies metrics that assume that there is only one pod (the static pod) being run, and all other pods have been terminated.
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gomega.Eventually(ctx, func(ctx context.Context) error {
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podList, err := e2epod.NewPodClient(f).List(ctx, metav1.ListOptions{})
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if err != nil {
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return fmt.Errorf("failed listing pods while waiting for all pods to be terminated: %v", err)
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}
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var remainingPods []string
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for _, pod := range podList.Items {
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// The mirror pod is the only expected pod to be running
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if pod.Name == mirrorPodName && pod.Namespace == ns {
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continue
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}
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remainingPods = append(remainingPods, fmt.Sprintf("(%s/%s)", pod.Namespace, pod.Name))
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}
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if len(remainingPods) > 0 {
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return fmt.Errorf("not all pods are terminated yet prior to starting mirror pod test: %v pods that still exist: %v", len(remainingPods), strings.Join(remainingPods, ","))
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}
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return nil
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}, f.Timeouts.PodDelete, f.Timeouts.Poll).Should(gomega.Succeed())
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})
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ginkgo.It("the mirror pod should terminate successfully", func(ctx context.Context) {
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ginkgo.By("verifying the pod is described as syncing in metrics")
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gomega.Eventually(ctx, getKubeletMetrics, 5*time.Second, time.Second).Should(gstruct.MatchKeys(gstruct.IgnoreExtras, gstruct.Keys{
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"kubelet_working_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_working_pods{config="desired", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="sync", static="true"}`: timelessSample(1),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="sync", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminating", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminated", static="unknown"}`: timelessSample(0),
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}),
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"kubelet_mirror_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_mirror_pods`: timelessSample(1),
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}),
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"kubelet_active_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_active_pods{static=""}`: timelessSample(0),
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`kubelet_active_pods{static="true"}`: timelessSample(1),
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}),
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"kubelet_desired_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_desired_pods{static=""}`: timelessSample(0),
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`kubelet_desired_pods{static="true"}`: timelessSample(1),
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}),
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}))
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ginkgo.By("delete the static pod")
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err := deleteStaticPod(podPath, staticPodName, ns)
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framework.ExpectNoError(err)
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// Note it is important we have a small delay here as we would like to reproduce https://issues.k8s.io/113091 which requires a failure in syncTerminatingPod()
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// This requires waiting a small period between the static pod being deleted so that syncTerminatingPod() will attempt to run
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ginkgo.By("sleeping before stopping the container runtime")
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time.Sleep(2 * time.Second)
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ginkgo.By("stop the container runtime")
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err = stopContainerRuntime()
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framework.ExpectNoError(err, "expected no error stopping the container runtime")
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ginkgo.By("waiting for the container runtime to be stopped")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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_, _, err := getCRIClient()
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return err
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}, 2*time.Minute, time.Second*5).ShouldNot(gomega.Succeed())
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ginkgo.By("verifying the mirror pod is running")
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gomega.Consistently(ctx, func(ctx context.Context) error {
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return checkMirrorPodRunning(ctx, f.ClientSet, mirrorPodName, ns)
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}, 19*time.Second, 200*time.Millisecond).Should(gomega.BeNil())
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ginkgo.By("verifying the pod is described as terminating in metrics")
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gomega.Eventually(ctx, getKubeletMetrics, 5*time.Second, time.Second).Should(gstruct.MatchKeys(gstruct.IgnoreExtras, gstruct.Keys{
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"kubelet_working_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_working_pods{config="desired", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="sync", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="sync", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static="true"}`: timelessSample(1),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminating", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminated", static="unknown"}`: timelessSample(0),
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}),
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"kubelet_mirror_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_mirror_pods`: timelessSample(1),
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}),
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"kubelet_active_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_active_pods{static=""}`: timelessSample(0),
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// TODO: the pod is still running and consuming resources, it should be considered in
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// admission https://github.com/kubernetes/kubernetes/issues/104824 for static pods at
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// least, which means it should be 1
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`kubelet_active_pods{static="true"}`: timelessSample(0),
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}),
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"kubelet_desired_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_desired_pods{static=""}`: timelessSample(0),
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`kubelet_desired_pods{static="true"}`: timelessSample(0),
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})}))
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ginkgo.By("start the container runtime")
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err = startContainerRuntime()
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framework.ExpectNoError(err, "expected no error starting the container runtime")
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ginkgo.By("waiting for the container runtime to start")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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r, _, err := getCRIClient()
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if err != nil {
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return fmt.Errorf("error getting CRI client: %w", err)
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}
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status, err := r.Status(ctx, true)
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if err != nil {
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return fmt.Errorf("error checking CRI status: %w", err)
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}
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framework.Logf("Runtime started: %#v", status)
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return nil
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}, 2*time.Minute, time.Second*5).Should(gomega.Succeed())
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ginkgo.By(fmt.Sprintf("verifying that the mirror pod (%s/%s) stops running after about 30s", ns, mirrorPodName))
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// from the time the container runtime starts, it should take a maximum of:
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// 20s (grace period) + 2 sync transitions * 1s + 2s between housekeeping + 3s to detect CRI up +
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// 2s overhead
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// which we calculate here as "about 30s", so we try a bit longer than that but verify that it is
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// tightly bounded by not waiting longer (we want to catch regressions to shutdown)
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time.Sleep(30 * time.Second)
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gomega.Eventually(ctx, func(ctx context.Context) error {
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return checkMirrorPodDisappear(ctx, f.ClientSet, mirrorPodName, ns)
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}, time.Second*3, time.Second).Should(gomega.Succeed())
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ginkgo.By("verifying the pod finishes terminating and is removed from metrics")
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gomega.Eventually(ctx, getKubeletMetrics, 15*time.Second, time.Second).Should(gstruct.MatchKeys(gstruct.IgnoreExtras, gstruct.Keys{
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"kubelet_working_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_working_pods{config="desired", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="sync", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="sync", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="sync", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminating", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminating", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminating", static="unknown"}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="desired", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static=""}`: timelessSample(0),
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`kubelet_working_pods{config="orphan", lifecycle="terminated", static="true"}`: timelessSample(0),
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`kubelet_working_pods{config="runtime_only", lifecycle="terminated", static="unknown"}`: timelessSample(0),
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}),
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"kubelet_mirror_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_mirror_pods`: timelessSample(0),
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}),
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"kubelet_active_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_active_pods{static=""}`: timelessSample(0),
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`kubelet_active_pods{static="true"}`: timelessSample(0),
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}),
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"kubelet_desired_pods": gstruct.MatchElements(sampleLabelID, 0, gstruct.Elements{
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`kubelet_desired_pods{static=""}`: timelessSample(0),
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`kubelet_desired_pods{static="true"}`: timelessSample(0),
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}),
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}))
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})
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ginkgo.AfterEach(func(ctx context.Context) {
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ginkgo.By("starting the container runtime")
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err := startContainerRuntime()
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framework.ExpectNoError(err, "expected no error starting the container runtime")
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ginkgo.By("waiting for the container runtime to start")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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_, _, err := getCRIClient()
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if err != nil {
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return fmt.Errorf("error getting cri client: %v", err)
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}
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return nil
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}, 2*time.Minute, time.Second*5).Should(gomega.Succeed())
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})
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})
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ginkgo.AfterEach(func(ctx context.Context) {
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ginkgo.By("delete the static pod")
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err := deleteStaticPod(podPath, staticPodName, ns)
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if !os.IsNotExist(err) {
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framework.ExpectNoError(err)
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}
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ginkgo.By("wait for the mirror pod to disappear")
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gomega.Eventually(ctx, func(ctx context.Context) error {
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return checkMirrorPodDisappear(ctx, f.ClientSet, mirrorPodName, ns)
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}, 2*time.Minute, time.Second*4).Should(gomega.BeNil())
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})
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})
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})
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func createStaticPodWithGracePeriod(dir, name, namespace string) error {
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template := `
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apiVersion: v1
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kind: Pod
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metadata:
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name: %s
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namespace: %s
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spec:
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terminationGracePeriodSeconds: 20
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containers:
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- name: m-test
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image: %s
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command:
|
|
- /bin/sh
|
|
args:
|
|
- '-c'
|
|
- |
|
|
_term() {
|
|
echo "Caught SIGTERM signal!"
|
|
sleep 100
|
|
}
|
|
trap _term SIGTERM
|
|
sleep 1000
|
|
`
|
|
file := staticPodPath(dir, name, namespace)
|
|
podYaml := fmt.Sprintf(template, name, namespace, imageutils.GetE2EImage(imageutils.BusyBox))
|
|
|
|
f, err := os.OpenFile(file, os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0666)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
|
|
_, err = f.WriteString(podYaml)
|
|
framework.Logf("has written %v", file)
|
|
return err
|
|
}
|
|
|
|
func checkMirrorPodRunningWithUID(ctx context.Context, cl clientset.Interface, name, namespace string, oUID types.UID) error {
|
|
pod, err := cl.CoreV1().Pods(namespace).Get(ctx, name, metav1.GetOptions{})
|
|
if err != nil {
|
|
return fmt.Errorf("expected the mirror pod %q to appear: %w", name, err)
|
|
}
|
|
if pod.UID != oUID {
|
|
return fmt.Errorf("expected the uid of mirror pod %q to be same, got %q", name, pod.UID)
|
|
}
|
|
if pod.Status.Phase != v1.PodRunning {
|
|
return fmt.Errorf("expected the mirror pod %q to be running, got %q", name, pod.Status.Phase)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func sampleLabelID(element interface{}) string {
|
|
el := element.(*model.Sample)
|
|
return el.Metric.String()
|
|
}
|