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Merge pull request #117597 from CoderSherlock/master
Added e2e_node test for sigkilled pods exit code and exit reason check
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99e050f88e
133
test/e2e_node/pods_lifecycle_termination_test.go
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133
test/e2e_node/pods_lifecycle_termination_test.go
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/*
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Copyright 2023 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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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/util/uuid"
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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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testutils "k8s.io/kubernetes/test/utils"
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admissionapi "k8s.io/pod-security-admission/api"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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)
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// Pod sigkill test will cover pods with graceful termination period set but failed
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// to terminate and forcefully killed by kubelet. This test examine pod's container's
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// exit code is 137 and the exit reason is `Error`
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var _ = SIGDescribe("Pod SIGKILL [LinuxOnly] [NodeConformance]", func() {
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f := framework.NewDefaultFramework("sigkill-test")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelBaseline
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podName := "sigkill-pod-" + string(uuid.NewUUID())
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containerName := "sigkill-target-container"
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podSpec := getSigkillTargetPod(podName, containerName)
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ginkgo.Context("", func() {
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ginkgo.BeforeEach(func() {
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ginkgo.By("setting up the pod to be used in the test")
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e2epod.NewPodClient(f).Create(context.TODO(), podSpec)
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})
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ginkgo.It("The containers terminated forcefully by Sigkill should have the correct exit code(137) and reason (Error)", func() {
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ginkgo.By(fmt.Sprintf("Waiting for the pod (%v/%v) to be running", f.Namespace.Name, podSpec.Name))
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err := e2epod.WaitForPodNameRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, f.Namespace.Name)
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framework.ExpectNoError(err, "Failed to await for the pod to be running: %q", podSpec.Name)
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// Checking pod's readiness to confirm the signal handler has registered successfully.
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err = e2epod.WaitForPodCondition(context.TODO(), f.ClientSet, f.Namespace.Name, podSpec.Name, "Ready", f.Timeouts.PodStart, testutils.PodRunningReady)
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framework.ExpectNoError(err, "Failed to await Pod (%v/%v) become ready after registering signal handler: %v", f.Namespace.Name, podSpec.Name, err)
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ginkgo.By(fmt.Sprintf("Deleting the pod (%v/%v) to set a deletion timestamp", f.Namespace.Name, podSpec.Name))
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err = e2epod.NewPodClient(f).Delete(context.TODO(), podSpec.Name, metav1.DeleteOptions{})
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framework.ExpectNoError(err, "Failed to delete the pod: %q", podSpec.Name)
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ginkgo.By(fmt.Sprintf("Waiting for the pod (%v/%v) to be transitioned to the terminated phase", f.Namespace.Name, podSpec.Name))
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err = e2epod.WaitForPodTerminatedInNamespace(context.TODO(), f.ClientSet, podSpec.Name, "", f.Namespace.Name)
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framework.ExpectNoError(err, "Failed to await for the pod to be terminated: %q", podSpec.Name)
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ginkgo.By(fmt.Sprintf("Fetching the end state of the pod (%v/%v)", f.Namespace.Name, podSpec.Name))
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pod, err := e2epod.NewPodClient(f).Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
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framework.ExpectNoError(err, "Failed to fetch the end state of the pod: %q", podSpec.Name)
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ginkgo.By(fmt.Sprintf("Verify the pod (%v/%v) container is in the terminated state", pod.Namespace, podSpec.Name))
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gomega.Expect(pod.Status.ContainerStatuses).Should(gomega.HaveLen(1), "The pod container has %v status", len(pod.Status.ContainerStatuses))
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containerStatus := pod.Status.ContainerStatuses[0]
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gomega.Expect(containerStatus.State.Terminated).ShouldNot(gomega.BeNil(), "The pod container is in not in the Terminated state")
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ginkgo.By(fmt.Sprintf("Verifying the exit code for the terminated container is 137 for pod (%v/%v)", pod.Namespace, podSpec.Name))
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gomega.Expect(containerStatus.State.Terminated.ExitCode).Should(gomega.Equal(int32(137)))
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ginkgo.By(fmt.Sprintf("Verify exit reason of the pod (%v/%v) container", f.Namespace.Name, podSpec.Name))
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framework.ExpectEqual(containerStatus.State.Terminated.Reason, "Error", fmt.Sprintf("Container terminated by sigkill expect Error but got %v", containerStatus.State.Terminated.Reason))
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})
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ginkgo.AfterEach(func() {
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ginkgo.By(fmt.Sprintf("Deleting pod by removing finalizers: %s", podSpec.Name))
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e2epod.NewPodClient(f).RemoveFinalizer(context.TODO(), podSpec.Name, testFinalizer)
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ginkgo.By(fmt.Sprintf("Confirm the pod was successfully deleted: %s", podSpec.Name))
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e2epod.WaitForPodNotFoundInNamespace(context.TODO(), f.ClientSet, podSpec.Name, f.Namespace.Name, f.Timeouts.PodDelete)
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})
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})
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})
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func getSigkillTargetPod(podName string, ctnName string) *v1.Pod {
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gracePeriod := int64(5)
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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// Using default test finalizer to keep exit status and code can be
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// preserved after deleting the pod
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Finalizers: []string{testFinalizer},
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyNever,
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Containers: []v1.Container{
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{
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Name: ctnName,
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Image: busyboxImage,
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// In the main container, SIGTERM was trapped and later /tmp/healthy
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// will be created for readiness probe to verify if the trap was
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// excucuted successfully
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Command: []string{
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"sh",
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"-c",
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"trap \"echo SIGTERM caught\" SIGTERM SIGINT; touch /tmp/healthy; sleep 1000",
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},
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// Using readinessprobe to guarantee signal handler registering finished
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ReadinessProbe: &v1.Probe{
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InitialDelaySeconds: 1,
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TimeoutSeconds: 2,
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ProbeHandler: v1.ProbeHandler{
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Exec: &v1.ExecAction{
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Command: []string{"/bin/sh", "-c", "cat /tmp/healthy"},
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},
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},
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},
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},
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},
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TerminationGracePeriodSeconds: &gracePeriod,
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},
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}
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}
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