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https://github.com/k3s-io/kubernetes.git
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kubelet: more tests for generic ephemeral volumes
This simulates various error scenarios (PVC not created for pod, feature disabled) and switching between feature disabled and enabled.
This commit is contained in:
Patrick Ohly
parent
edb9a8584c
commit
68370c8aa6
@ -22,6 +22,7 @@ import (
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"fmt"
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"github.com/stretchr/testify/require"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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@ -454,6 +455,124 @@ func TestFindAndRemoveNonattachableVolumes(t *testing.T) {
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}
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}
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func TestEphemeralVolumeOwnerCheck(t *testing.T) {
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.GenericEphemeralVolume, true)()
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// create dswp
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pod, pv, pvc := createEphemeralVolumeObjects("dswp-test-pod", "dswp-test-volume-name", false /* not owned */)
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dswp, fakePodManager, _ := createDswpWithVolume(t, pv, pvc)
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fakePodManager.AddPod(pod)
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podName := util.GetUniquePodName(pod)
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dswp.findAndAddNewPods()
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if dswp.pods.processedPods[podName] {
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t.Fatalf("%s should not have been processed by the populator", podName)
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}
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require.Equal(t,
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[]string{fmt.Sprintf("error processing PVC %s/%s: not the ephemeral PVC for the pod", pvc.Namespace, pvc.Name)},
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dswp.desiredStateOfWorld.PopPodErrors(podName),
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)
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}
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func TestEphemeralVolumeEnablement(t *testing.T) {
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// create dswp
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pod, pv, pvc := createEphemeralVolumeObjects("dswp-test-pod", "dswp-test-volume-name", true /* owned */)
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dswp, fakePodManager, fakesDSW := createDswpWithVolume(t, pv, pvc)
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fakePodManager.AddPod(pod)
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podName := util.GetUniquePodName(pod)
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volumeName := pod.Spec.Volumes[0].Name
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generatedVolumeName := "fake-plugin/" + volumeName
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// Feature disabled -> refuse to process pod.
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.GenericEphemeralVolume, false)()
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dswp.findAndAddNewPods()
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if dswp.pods.processedPods[podName] {
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t.Fatalf("%s should not have been processed by the populator", podName)
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}
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require.Equal(t,
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[]string{fmt.Sprintf("volume %s is a generic ephemeral volume, but that feature is disabled in kubelet", volumeName)},
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dswp.desiredStateOfWorld.PopPodErrors(podName),
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)
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// Enabled -> process pod.
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.GenericEphemeralVolume, true)()
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dswp.findAndAddNewPods()
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if !dswp.pods.processedPods[podName] {
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t.Fatalf("Failed to record that the volumes for the specified pod: %s have been processed by the populator", podName)
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}
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expectedVolumeName := v1.UniqueVolumeName(generatedVolumeName)
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volumeExists := fakesDSW.VolumeExists(expectedVolumeName)
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if !volumeExists {
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t.Fatalf(
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"VolumeExists(%q) failed. Expected: <true> Actual: <%v>",
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expectedVolumeName,
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volumeExists)
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}
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if podExistsInVolume := fakesDSW.PodExistsInVolume(
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podName, expectedVolumeName); !podExistsInVolume {
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t.Fatalf(
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"DSW PodExistsInVolume returned incorrect value. Expected: <true> Actual: <%v>",
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podExistsInVolume)
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}
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verifyVolumeExistsInVolumesToMount(
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t, v1.UniqueVolumeName(generatedVolumeName), false /* expectReportedInUse */, fakesDSW)
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//let the pod be terminated
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podGet, exist := fakePodManager.GetPodByName(pod.Namespace, pod.Name)
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if !exist {
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t.Fatalf("Failed to get pod by pod name: %s and namespace: %s", pod.Name, pod.Namespace)
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}
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podGet.Status.Phase = v1.PodFailed
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// Pretend again that the feature is disabled.
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// Removal of the pod and volumes is expected to work.
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defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.GenericEphemeralVolume, false)()
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dswp.findAndRemoveDeletedPods()
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// Although Pod status is terminated, pod still exists in pod manager and actual state does not has this pod and volume information
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// desired state populator will fail to delete this pod and volume first
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volumeExists = fakesDSW.VolumeExists(expectedVolumeName)
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if !volumeExists {
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t.Fatalf(
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"VolumeExists(%q) failed. Expected: <true> Actual: <%v>",
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expectedVolumeName,
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volumeExists)
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}
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if podExistsInVolume := fakesDSW.PodExistsInVolume(
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podName, expectedVolumeName); !podExistsInVolume {
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t.Fatalf(
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"DSW PodExistsInVolume returned incorrect value. Expected: <true> Actual: <%v>",
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podExistsInVolume)
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}
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// reconcile with actual state so that volume is added into the actual state
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// desired state populator now can successfully delete the pod and volume
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fakeASW := dswp.actualStateOfWorld
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reconcileASW(fakeASW, fakesDSW, t)
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dswp.findAndRemoveDeletedPods()
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volumeExists = fakesDSW.VolumeExists(expectedVolumeName)
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if volumeExists {
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t.Fatalf(
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"VolumeExists(%q) failed. Expected: <false> Actual: <%v>",
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expectedVolumeName,
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volumeExists)
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}
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if podExistsInVolume := fakesDSW.PodExistsInVolume(
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podName, expectedVolumeName); podExistsInVolume {
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t.Fatalf(
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"DSW PodExistsInVolume returned incorrect value. Expected: <false> Actual: <%v>",
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podExistsInVolume)
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}
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}
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func TestFindAndAddNewPods_FindAndRemoveDeletedPods_Valid_Block_VolumeDevices(t *testing.T) {
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// create dswp
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mode := v1.PersistentVolumeBlock
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@ -1076,6 +1195,74 @@ func createPodWithVolume(pod, pv, pvc string, containers []v1.Container) *v1.Pod
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}
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}
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func createEphemeralVolumeObjects(podName, volumeName string, owned bool) (pod *v1.Pod, pv *v1.PersistentVolume, pvc *v1.PersistentVolumeClaim) {
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pod = &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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UID: "dswp-test-pod-uid",
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Namespace: "dswp-test",
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},
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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Name: volumeName,
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VolumeSource: v1.VolumeSource{
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Ephemeral: &v1.EphemeralVolumeSource{
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VolumeClaimTemplate: &v1.PersistentVolumeClaimTemplate{},
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},
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},
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},
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},
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Containers: []v1.Container{
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{
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VolumeMounts: []v1.VolumeMount{
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{
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Name: volumeName,
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MountPath: "/mnt",
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},
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},
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},
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},
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},
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Status: v1.PodStatus{
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Phase: v1.PodPhase("Running"),
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},
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}
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mode := v1.PersistentVolumeFilesystem
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pv = &v1.PersistentVolume{
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ObjectMeta: metav1.ObjectMeta{
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Name: volumeName,
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},
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Spec: v1.PersistentVolumeSpec{
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ClaimRef: &v1.ObjectReference{Namespace: "ns", Name: "file-bound"},
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VolumeMode: &mode,
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},
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}
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pvc = &v1.PersistentVolumeClaim{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName + "-" + volumeName,
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Namespace: pod.Namespace,
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},
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Spec: v1.PersistentVolumeClaimSpec{
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VolumeName: "dswp-test-volume-name",
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},
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Status: v1.PersistentVolumeClaimStatus{
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Phase: v1.ClaimBound,
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},
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}
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if owned {
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controller := true
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pvc.OwnerReferences = []metav1.OwnerReference{
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{
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UID: pod.UID,
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Name: podName,
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Controller: &controller,
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},
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}
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}
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return
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}
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func createDswpWithVolume(t *testing.T, pv *v1.PersistentVolume, pvc *v1.PersistentVolumeClaim) (*desiredStateOfWorldPopulator, kubepod.Manager, cache.DesiredStateOfWorld) {
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fakeVolumePluginMgr, _ := volumetesting.GetTestKubeletVolumePluginMgr(t)
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dswp, fakePodManager, fakesDSW := createDswpWithVolumeWithCustomPluginMgr(t, pv, pvc, fakeVolumePluginMgr)
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