mirror of
https://github.com/k3s-io/kubernetes.git
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339 lines
12 KiB
Go
339 lines
12 KiB
Go
/*
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Copyright 2016 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 storage
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import (
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"context"
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"fmt"
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"net"
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"time"
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"github.com/onsi/ginkgo"
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"github.com/onsi/gomega"
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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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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/kubernetes/test/e2e/framework"
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e2ekubesystem "k8s.io/kubernetes/test/e2e/framework/kubesystem"
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e2enode "k8s.io/kubernetes/test/e2e/framework/node"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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e2epv "k8s.io/kubernetes/test/e2e/framework/pv"
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e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
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e2essh "k8s.io/kubernetes/test/e2e/framework/ssh"
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e2evolume "k8s.io/kubernetes/test/e2e/framework/volume"
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"k8s.io/kubernetes/test/e2e/storage/utils"
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)
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type testBody func(c clientset.Interface, f *framework.Framework, clientPod *v1.Pod)
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type disruptiveTest struct {
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testItStmt string
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runTest testBody
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}
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// checkForControllerManagerHealthy checks that the controller manager does not crash within "duration"
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func checkForControllerManagerHealthy(duration time.Duration) error {
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var PID string
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cmd := "pidof kube-controller-manager"
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for start := time.Now(); time.Since(start) < duration; time.Sleep(5 * time.Second) {
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result, err := e2essh.SSH(cmd, net.JoinHostPort(framework.GetMasterHost(), e2essh.SSHPort), framework.TestContext.Provider)
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if err != nil {
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// We don't necessarily know that it crashed, pipe could just be broken
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e2essh.LogResult(result)
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return fmt.Errorf("master unreachable after %v", time.Since(start))
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} else if result.Code != 0 {
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e2essh.LogResult(result)
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return fmt.Errorf("SSH result code not 0. actually: %v after %v", result.Code, time.Since(start))
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} else if result.Stdout != PID {
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if PID == "" {
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PID = result.Stdout
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} else {
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//its dead
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return fmt.Errorf("controller manager crashed, old PID: %s, new PID: %s", PID, result.Stdout)
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}
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} else {
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framework.Logf("kube-controller-manager still healthy after %v", time.Since(start))
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}
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}
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return nil
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}
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var _ = utils.SIGDescribe("NFSPersistentVolumes[Disruptive][Flaky]", func() {
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f := framework.NewDefaultFramework("disruptive-pv")
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var (
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c clientset.Interface
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ns string
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nfsServerPod *v1.Pod
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nfsPVconfig e2epv.PersistentVolumeConfig
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pvcConfig e2epv.PersistentVolumeClaimConfig
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nfsServerHost, clientNodeIP string
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clientNode *v1.Node
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volLabel labels.Set
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selector *metav1.LabelSelector
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)
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ginkgo.BeforeEach(func() {
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// To protect the NFS volume pod from the kubelet restart, we isolate it on its own node.
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e2eskipper.SkipUnlessNodeCountIsAtLeast(minNodes)
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e2eskipper.SkipIfProviderIs("local")
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c = f.ClientSet
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ns = f.Namespace.Name
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volLabel = labels.Set{e2epv.VolumeSelectorKey: ns}
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selector = metav1.SetAsLabelSelector(volLabel)
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// Start the NFS server pod.
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_, nfsServerPod, nfsServerHost = e2evolume.NewNFSServer(c, ns, []string{"-G", "777", "/exports"})
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nfsPVconfig = e2epv.PersistentVolumeConfig{
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NamePrefix: "nfs-",
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Labels: volLabel,
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PVSource: v1.PersistentVolumeSource{
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NFS: &v1.NFSVolumeSource{
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Server: nfsServerHost,
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Path: "/exports",
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ReadOnly: false,
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},
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},
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}
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emptyStorageClass := ""
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pvcConfig = e2epv.PersistentVolumeClaimConfig{
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Selector: selector,
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StorageClassName: &emptyStorageClass,
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}
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// Get the first ready node IP that is not hosting the NFS pod.
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if clientNodeIP == "" {
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framework.Logf("Designating test node")
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nodes, err := e2enode.GetReadySchedulableNodes(c)
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framework.ExpectNoError(err)
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for _, node := range nodes.Items {
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if node.Name != nfsServerPod.Spec.NodeName {
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clientNode = &node
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clientNodeIP, err = e2enode.GetExternalIP(clientNode)
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framework.ExpectNoError(err)
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break
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}
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}
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gomega.Expect(clientNodeIP).NotTo(gomega.BeEmpty())
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}
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})
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ginkgo.AfterEach(func() {
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e2epod.DeletePodWithWait(c, nfsServerPod)
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})
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ginkgo.Context("when kube-controller-manager restarts", func() {
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var (
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diskName1, diskName2 string
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err error
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pvConfig1, pvConfig2 e2epv.PersistentVolumeConfig
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pv1, pv2 *v1.PersistentVolume
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pvSource1, pvSource2 *v1.PersistentVolumeSource
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pvc1, pvc2 *v1.PersistentVolumeClaim
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clientPod *v1.Pod
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)
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ginkgo.BeforeEach(func() {
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e2eskipper.SkipUnlessProviderIs("gce")
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e2eskipper.SkipUnlessSSHKeyPresent()
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ginkgo.By("Initializing first PD with PVPVC binding")
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pvSource1, diskName1 = createGCEVolume()
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framework.ExpectNoError(err)
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pvConfig1 = e2epv.PersistentVolumeConfig{
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NamePrefix: "gce-",
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Labels: volLabel,
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PVSource: *pvSource1,
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Prebind: nil,
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}
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pv1, pvc1, err = e2epv.CreatePVPVC(c, pvConfig1, pvcConfig, ns, false)
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framework.ExpectNoError(err)
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framework.ExpectNoError(e2epv.WaitOnPVandPVC(c, ns, pv1, pvc1))
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ginkgo.By("Initializing second PD with PVPVC binding")
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pvSource2, diskName2 = createGCEVolume()
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framework.ExpectNoError(err)
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pvConfig2 = e2epv.PersistentVolumeConfig{
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NamePrefix: "gce-",
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Labels: volLabel,
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PVSource: *pvSource2,
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Prebind: nil,
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}
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pv2, pvc2, err = e2epv.CreatePVPVC(c, pvConfig2, pvcConfig, ns, false)
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framework.ExpectNoError(err)
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framework.ExpectNoError(e2epv.WaitOnPVandPVC(c, ns, pv2, pvc2))
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ginkgo.By("Attaching both PVC's to a single pod")
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clientPod, err = e2epod.CreatePod(c, ns, nil, []*v1.PersistentVolumeClaim{pvc1, pvc2}, true, "")
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framework.ExpectNoError(err)
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})
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ginkgo.AfterEach(func() {
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// Delete client/user pod first
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framework.ExpectNoError(e2epod.DeletePodWithWait(c, clientPod))
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// Delete PV and PVCs
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if errs := e2epv.PVPVCCleanup(c, ns, pv1, pvc1); len(errs) > 0 {
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framework.Failf("AfterEach: Failed to delete PVC and/or PV. Errors: %v", utilerrors.NewAggregate(errs))
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}
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pv1, pvc1 = nil, nil
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if errs := e2epv.PVPVCCleanup(c, ns, pv2, pvc2); len(errs) > 0 {
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framework.Failf("AfterEach: Failed to delete PVC and/or PV. Errors: %v", utilerrors.NewAggregate(errs))
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}
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pv2, pvc2 = nil, nil
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// Delete the actual disks
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if diskName1 != "" {
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framework.ExpectNoError(e2epv.DeletePDWithRetry(diskName1))
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}
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if diskName2 != "" {
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framework.ExpectNoError(e2epv.DeletePDWithRetry(diskName2))
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}
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})
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ginkgo.It("should delete a bound PVC from a clientPod, restart the kube-control-manager, and ensure the kube-controller-manager does not crash", func() {
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e2eskipper.SkipUnlessSSHKeyPresent()
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ginkgo.By("Deleting PVC for volume 2")
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err = e2epv.DeletePersistentVolumeClaim(c, pvc2.Name, ns)
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framework.ExpectNoError(err)
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pvc2 = nil
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ginkgo.By("Restarting the kube-controller-manager")
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err = e2ekubesystem.RestartControllerManager()
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framework.ExpectNoError(err)
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err = e2ekubesystem.WaitForControllerManagerUp()
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framework.ExpectNoError(err)
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framework.Logf("kube-controller-manager restarted")
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ginkgo.By("Observing the kube-controller-manager healthy for at least 2 minutes")
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// Continue checking for 2 minutes to make sure kube-controller-manager is healthy
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err = checkForControllerManagerHealthy(2 * time.Minute)
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framework.ExpectNoError(err)
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})
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})
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ginkgo.Context("when kubelet restarts", func() {
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var (
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clientPod *v1.Pod
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pv *v1.PersistentVolume
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pvc *v1.PersistentVolumeClaim
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)
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ginkgo.BeforeEach(func() {
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framework.Logf("Initializing test spec")
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clientPod, pv, pvc = initTestCase(f, c, nfsPVconfig, pvcConfig, ns, clientNode.Name)
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})
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ginkgo.AfterEach(func() {
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framework.Logf("Tearing down test spec")
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tearDownTestCase(c, f, ns, clientPod, pvc, pv, true /* force PV delete */)
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pv, pvc, clientPod = nil, nil, nil
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})
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// Test table housing the ginkgo.It() title string and test spec. runTest is type testBody, defined at
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// the start of this file. To add tests, define a function mirroring the testBody signature and assign
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// to runTest.
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disruptiveTestTable := []disruptiveTest{
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{
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testItStmt: "Should test that a file written to the mount before kubelet restart is readable after restart.",
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runTest: utils.TestKubeletRestartsAndRestoresMount,
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},
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{
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testItStmt: "Should test that a volume mounted to a pod that is deleted while the kubelet is down unmounts when the kubelet returns.",
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runTest: utils.TestVolumeUnmountsFromDeletedPod,
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},
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{
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testItStmt: "Should test that a volume mounted to a pod that is force deleted while the kubelet is down unmounts when the kubelet returns.",
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runTest: utils.TestVolumeUnmountsFromForceDeletedPod,
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},
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}
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// Test loop executes each disruptiveTest iteratively.
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for _, test := range disruptiveTestTable {
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func(t disruptiveTest) {
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ginkgo.It(t.testItStmt, func() {
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ginkgo.By("Executing Spec")
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t.runTest(c, f, clientPod)
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})
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}(test)
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}
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})
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})
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// createGCEVolume creates PersistentVolumeSource for GCEVolume.
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func createGCEVolume() (*v1.PersistentVolumeSource, string) {
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diskName, err := e2epv.CreatePDWithRetry()
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framework.ExpectNoError(err)
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return &v1.PersistentVolumeSource{
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GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
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PDName: diskName,
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FSType: "ext3",
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ReadOnly: false,
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},
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}, diskName
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}
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// initTestCase initializes spec resources (pv, pvc, and pod) and returns pointers to be consumed
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// by the test.
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func initTestCase(f *framework.Framework, c clientset.Interface, pvConfig e2epv.PersistentVolumeConfig, pvcConfig e2epv.PersistentVolumeClaimConfig, ns, nodeName string) (*v1.Pod, *v1.PersistentVolume, *v1.PersistentVolumeClaim) {
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pv, pvc, err := e2epv.CreatePVPVC(c, pvConfig, pvcConfig, ns, false)
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defer func() {
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if err != nil {
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e2epv.DeletePersistentVolumeClaim(c, pvc.Name, ns)
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e2epv.DeletePersistentVolume(c, pv.Name)
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}
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}()
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framework.ExpectNoError(err)
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pod := e2epod.MakePod(ns, nil, []*v1.PersistentVolumeClaim{pvc}, true, "")
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pod.Spec.NodeName = nodeName
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framework.Logf("Creating NFS client pod.")
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pod, err = c.CoreV1().Pods(ns).Create(context.TODO(), pod, metav1.CreateOptions{})
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framework.Logf("NFS client Pod %q created on Node %q", pod.Name, nodeName)
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framework.ExpectNoError(err)
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defer func() {
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if err != nil {
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e2epod.DeletePodWithWait(c, pod)
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}
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}()
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err = e2epod.WaitForPodRunningInNamespace(c, pod)
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framework.ExpectNoError(err, fmt.Sprintf("Pod %q timed out waiting for phase: Running", pod.Name))
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// Return created api objects
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pod, err = c.CoreV1().Pods(ns).Get(context.TODO(), pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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pvc, err = c.CoreV1().PersistentVolumeClaims(ns).Get(context.TODO(), pvc.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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pv, err = c.CoreV1().PersistentVolumes().Get(context.TODO(), pv.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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return pod, pv, pvc
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}
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// tearDownTestCase destroy resources created by initTestCase.
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func tearDownTestCase(c clientset.Interface, f *framework.Framework, ns string, client *v1.Pod, pvc *v1.PersistentVolumeClaim, pv *v1.PersistentVolume, forceDeletePV bool) {
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// Ignore deletion errors. Failing on them will interrupt test cleanup.
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e2epod.DeletePodWithWait(c, client)
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e2epv.DeletePersistentVolumeClaim(c, pvc.Name, ns)
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if forceDeletePV && pv != nil {
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e2epv.DeletePersistentVolume(c, pv.Name)
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return
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}
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err := e2epv.WaitForPersistentVolumeDeleted(c, pv.Name, 5*time.Second, 5*time.Minute)
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framework.ExpectNoError(err, "Persistent Volume %v not deleted by dynamic provisioner", pv.Name)
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}
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