mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-22 19:31:44 +00:00
Revert "fix flaky host cleanup test"
This commit is contained in:
parent
739f4ffe0e
commit
e6cdf20c5c
@ -130,7 +130,10 @@ func updateNodeLabels(c clientset.Interface, nodeNames sets.String, toAdd, toRem
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}
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}
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}
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}
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// Wraps startVolumeServer to create and run a nfs-server pod. Returns server pod and its ip address.
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// Calls startVolumeServer to create and run a nfs-server pod. Returns server pod and its
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// ip address.
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// Note: startVolumeServer() waits for the nfs-server pod to be Running and sleeps some
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// so that the nfs server can start up.
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func createNfsServerPod(c clientset.Interface, config VolumeTestConfig) (*v1.Pod, string) {
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func createNfsServerPod(c clientset.Interface, config VolumeTestConfig) (*v1.Pod, string) {
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pod := startVolumeServer(c, config)
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pod := startVolumeServer(c, config)
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@ -142,26 +145,6 @@ func createNfsServerPod(c clientset.Interface, config VolumeTestConfig) (*v1.Pod
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return pod, ip
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return pod, ip
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}
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}
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// Restart the passed-in nfs-server by issuing a `/usr/sbin/rpc.nfsd 1` command in the
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// pod's (only) container. This command changes the number of nfs server threads from
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// (presumably) zero back to 1, and therefore allows nfs to open connections again.
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func restartNfsServer(serverPod *v1.Pod) {
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const startcmd = "/usr/sbin/rpc.nfsd 1"
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ns := fmt.Sprintf("--namespace=%v", serverPod.Namespace)
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framework.RunKubectlOrDie("exec", ns, serverPod.Name, "--", "/bin/sh", "-c", startcmd)
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}
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// Stop the passed-in nfs-server by issuing a `/usr/sbin/rpc.nfsd 0` command in the
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// pod's (only) container. This command changes the number of nfs server threads to 0,
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// thus closing all open nfs connections.
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func stopNfsServer(serverPod *v1.Pod) {
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const stopcmd = "/usr/sbin/rpc.nfsd 0"
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ns := fmt.Sprintf("--namespace=%v", serverPod.Namespace)
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framework.RunKubectlOrDie("exec", ns, serverPod.Name, "--", "/bin/sh", "-c", stopcmd)
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}
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// Creates a pod that mounts an nfs volume that is served by the nfs-server pod. The container
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// Creates a pod that mounts an nfs volume that is served by the nfs-server pod. The container
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// will execute the passed in shell cmd. Waits for the pod to start.
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// will execute the passed in shell cmd. Waits for the pod to start.
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// Note: the nfs plugin is defined inline, no PV or PVC.
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// Note: the nfs plugin is defined inline, no PV or PVC.
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@ -235,48 +218,42 @@ func checkPodCleanup(c clientset.Interface, pod *v1.Pod, expectClean bool) {
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timeout := 5 * time.Minute
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timeout := 5 * time.Minute
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poll := 20 * time.Second
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poll := 20 * time.Second
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podDir := filepath.Join("/var/lib/kubelet/pods", string(pod.UID))
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podUID := string(pod.UID)
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podDir := filepath.Join("/var/lib/kubelet/pods", podUID)
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mountDir := filepath.Join(podDir, "volumes", "kubernetes.io~nfs")
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mountDir := filepath.Join(podDir, "volumes", "kubernetes.io~nfs")
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// use ip rather than hostname in GCE
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// use ip rather than hostname in GCE
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nodeIP, err := framework.GetHostExternalAddress(c, pod)
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nodeIP, err := framework.GetHostExternalAddress(c, pod)
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Expect(err).NotTo(HaveOccurred())
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Expect(err).NotTo(HaveOccurred())
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condMsg := "deleted"
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condMsg := map[bool]string{
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if !expectClean {
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true: "deleted",
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condMsg = "present"
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false: "present",
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}
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}
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// table of host tests to perform (order may matter so not using a map)
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// table of host tests to perform
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type testT struct {
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tests := map[string]string{ //["what-to-test"] "remote-command"
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feature string // feature to test
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"pod UID directory": fmt.Sprintf("sudo ls %v", podDir),
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cmd string // remote command to execute on node
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"pod nfs mount": fmt.Sprintf("sudo mount | grep %v", mountDir),
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}
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tests := []testT{
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{
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feature: "pod UID directory",
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cmd: fmt.Sprintf("sudo ls %v", podDir),
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},
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{
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feature: "pod nfs mount",
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cmd: fmt.Sprintf("sudo mount | grep %v", mountDir),
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},
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}
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}
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for _, test := range tests {
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for test, cmd := range tests {
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framework.Logf("Wait up to %v for host's (%v) %q to be %v", timeout, nodeIP, test.feature, condMsg)
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framework.Logf("Wait up to %v for host's (%v) %q to be %v", timeout, nodeIP, test, condMsg[expectClean])
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err = wait.Poll(poll, timeout, func() (bool, error) {
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err = wait.Poll(poll, timeout, func() (bool, error) {
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result, _ := nodeExec(nodeIP, test.cmd)
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result, _ := nodeExec(nodeIP, cmd)
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framework.LogSSHResult(result)
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framework.LogSSHResult(result)
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ok := (result.Code == 0 && len(result.Stdout) > 0 && len(result.Stderr) == 0)
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sawFiles := result.Code == 0
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if expectClean && ok { // keep trying
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if expectClean && sawFiles { // keep trying
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return false, nil
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return false, nil
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}
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}
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if !expectClean && !ok { // stop wait loop
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if !expectClean && !sawFiles { // stop wait loop
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return true, fmt.Errorf("%v is gone but expected to exist", test.feature)
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return true, fmt.Errorf("%v is gone but expected to exist", test)
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}
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}
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return true, nil // done, host is as expected
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return true, nil // done, host is as expected
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})
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})
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Expect(err).NotTo(HaveOccurred(), fmt.Sprintf("Host (%v) cleanup error: %v. Expected %q to be %v", nodeIP, err, test.feature, condMsg))
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if err != nil {
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framework.Logf("Host (%v) cleanup error: %v. Expected %q to be %v", nodeIP, err, test, condMsg[expectClean])
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Expect(err).NotTo(HaveOccurred())
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}
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}
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}
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if expectClean {
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if expectClean {
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@ -398,20 +375,14 @@ var _ = framework.KubeDescribe("kubelet", func() {
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}
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}
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})
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})
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// Test host cleanup when disrupting the volume server.
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// Delete nfs server pod after another pods accesses the mounted nfs volume.
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framework.KubeDescribe("host cleanup with volume mounts [HostCleanup][Slow]", func() {
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framework.KubeDescribe("host cleanup with volume mounts [HostCleanup][Flaky]", func() {
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type hostCleanupTest struct {
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type hostCleanupTest struct {
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itDescr string
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itDescr string
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podCmd string
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podCmd string
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}
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}
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// Disrupt the nfs server pod after a client pod accesses the nfs volume.
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Context("Host cleanup after pod using NFS mount is deleted [Volume][NFS]", func() {
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// Note: the nfs-server is stopped NOT deleted. This is done to preserve its ip addr.
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// If the nfs-server pod is deleted the client pod's mount can not be unmounted.
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// If the nfs-server pod is deleted and re-created, due to having a different ip
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// addr, the client pod's mount still cannot be unmounted.
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Context("Host cleanup after disrupting NFS volume [NFS]", func() {
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// issue #31272
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// issue #31272
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var (
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var (
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nfsServerPod *v1.Pod
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nfsServerPod *v1.Pod
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@ -424,11 +395,11 @@ var _ = framework.KubeDescribe("kubelet", func() {
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testTbl := []hostCleanupTest{
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testTbl := []hostCleanupTest{
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{
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{
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itDescr: "after deleting the nfs-server, the host should be cleaned-up when deleting sleeping pod which mounts an NFS vol",
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itDescr: "after deleting the nfs-server, the host should be cleaned-up when deleting sleeping pod which mounts an NFS vol",
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podCmd: "sleep 6000", // keep pod running
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podCmd: "sleep 6000",
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},
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},
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{
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{
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itDescr: "after deleting the nfs-server, the host should be cleaned-up when deleting a pod accessing the NFS vol",
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itDescr: "after deleting the nfs-server, the host should be cleaned-up when deleting a pod accessing the NFS vol",
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podCmd: "while true; do echo FeFieFoFum >>/mnt/SUCCESS; sleep 1; cat /mnt/SUCCESS; done",
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podCmd: "while true; do echo FeFieFoFum >>/mnt/SUCCESS; cat /mnt/SUCCESS; done",
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},
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},
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}
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}
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@ -449,24 +420,28 @@ var _ = framework.KubeDescribe("kubelet", func() {
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})
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})
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// execute It blocks from above table of tests
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// execute It blocks from above table of tests
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for _, t := range testTbl {
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for _, test := range testTbl {
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It(t.itDescr, func() {
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t := test // local copy for closure
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It(fmt.Sprintf("%v [Serial]", t.itDescr), func() {
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// create a pod which uses the nfs server's volume
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pod = createPodUsingNfs(f, c, ns, nfsIP, t.podCmd)
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pod = createPodUsingNfs(f, c, ns, nfsIP, t.podCmd)
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By("Stop the NFS server")
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By("Delete the NFS server pod")
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stopNfsServer(nfsServerPod)
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deletePodWithWait(f, c, nfsServerPod)
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nfsServerPod = nil
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By("Delete the pod mounted to the NFS volume")
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By("Delete the pod mounted to the NFS volume")
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deletePodWithWait(f, c, pod)
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deletePodWithWait(f, c, pod)
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// pod object is now stale, but is intentionally not nil
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// pod object is now stale, but is intentionally not nil
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By("Check if pod's host has been cleaned up -- expect not")
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By("Check if host running deleted pod has been cleaned up -- expect not")
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// expect the pod's host *not* to be cleaned up
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checkPodCleanup(c, pod, false)
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checkPodCleanup(c, pod, false)
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By("Restart the nfs server")
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By("Recreate the nfs server pod")
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restartNfsServer(nfsServerPod)
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nfsServerPod, nfsIP = createNfsServerPod(c, NFSconfig)
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By("Verify host running the deleted pod is now cleaned up")
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By("Verify host running the deleted pod is now cleaned up")
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// expect the pod's host to be cleaned up
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checkPodCleanup(c, pod, true)
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checkPodCleanup(c, pod, true)
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})
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})
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}
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}
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@ -408,10 +408,13 @@ func deletePodWithWait(f *framework.Framework, c clientset.Interface, pod *v1.Po
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Expect(err).NotTo(HaveOccurred())
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Expect(err).NotTo(HaveOccurred())
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}
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}
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// wait for pod to terminate
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// wait for pod to terminate. Expect apierr NotFound
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err = f.WaitForPodTerminated(pod.Name, "")
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err = f.WaitForPodTerminated(pod.Name, "")
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Expect(apierrs.IsNotFound(err)).To(BeTrue(), fmt.Sprintf("Expected IsNotFound error deleting pod %q, instead got: %v", pod.Name, err))
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Expect(err).To(HaveOccurred())
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if !apierrs.IsNotFound(err) {
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framework.Logf("Error! Expected IsNotFound error deleting pod %q, instead got: %v", pod.Name, err)
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Expect(apierrs.IsNotFound(err)).To(BeTrue())
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}
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framework.Logf("Ignore \"not found\" error above. Pod %v successfully deleted", pod.Name)
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framework.Logf("Ignore \"not found\" error above. Pod %v successfully deleted", pod.Name)
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}
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}
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