// Calls Run()
// Verifies there are no calls to attach or detach.
func Test_Run_Positive_DoNothing(t *testing.T) {
// Arrange
volumePluginMgr, fakePlugin := volumetesting.GetTestVolumePluginMgr(t)
dsw := cache.NewDesiredStateOfWorld(volumePluginMgr)
asw := cache.NewActualStateOfWorld(volumePluginMgr)
fakeKubeClient := controllervolumetesting.CreateTestClient()
fakeRecorder := &record.FakeRecorder{}
ad := operationexecutor.NewOperationExecutor(
fakeKubeClient, volumePluginMgr, fakeRecorder, false)
nodeInformer := informers.NewNodeInformer(
fakeKubeClient, resyncPeriod)
nsu := statusupdater.NewNodeStatusUpdater(
fakeKubeClient, nodeInformer, asw)
reconciler := NewReconciler(
reconcilerLoopPeriod, maxWaitForUnmountDuration, syncLoopPeriod, dsw, asw, ad, nsu)
// Act
ch := make(chan struct{})
go reconciler.Run(ch)
defer close(ch)
// Assert
waitForNewAttacherCallCount(t, 0 /* expectedCallCount */, fakePlugin)
verifyNewAttacherCallCount(t, true /* expectZeroNewAttacherCallCount */, fakePlugin)
verifyNewDetacherCallCount(t, true /* expectZeroNewDetacherCallCount */, fakePlugin)
waitForAttachCallCount(t, 0 /* expectedAttachCallCount */, fakePlugin)
waitForDetachCallCount(t, 0 /* expectedDetachCallCount */, fakePlugin)
}
// Populates desiredStateOfWorld cache with one node/volume/pod tuple.
// Calls Run()
// Verifies there is one attach call and no detach calls.
// Marks the node/volume as unmounted.
// Deletes the node/volume/pod tuple from desiredStateOfWorld cache.
// Verifies there is one detach call and no (new) attach calls.
func Test_Run_Positive_OneDesiredVolumeAttachThenDetachWithUnmountedVolume(t *testing.T) {
// Arrange
volumePluginMgr, fakePlugin := volumetesting.GetTestVolumePluginMgr(t)
dsw := cache.NewDesiredStateOfWorld(volumePluginMgr)
asw := cache.NewActualStateOfWorld(volumePluginMgr)
fakeKubeClient := controllervolumetesting.CreateTestClient()
ad := operationexecutor.NewOperationExecutor(fakeKubeClient, volumePluginMgr)
nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
reconciler := NewReconciler(
reconcilerLoopPeriod, maxWaitForUnmountDuration, dsw, asw, ad, nsu)
podName := "pod-uid"
volumeName := api.UniqueVolumeName("volume-name")
volumeSpec := controllervolumetesting.GetTestVolumeSpec(string(volumeName), volumeName)
nodeName := "node-name"
dsw.AddNode(nodeName)
volumeExists := dsw.VolumeExists(volumeName, nodeName)
if volumeExists {
t.Fatalf(
"Volume %q/node %q should not exist, but it does.",
volumeName,
nodeName)
}
generatedVolumeName, podAddErr := dsw.AddPod(types.UniquePodName(podName), controllervolumetesting.NewPod(podName, podName), volumeSpec, nodeName)
if podAddErr != nil {
t.Fatalf("AddPod failed. Expected: <no error> Actual: <%v>", podAddErr)
}
// Act
ch := make(chan struct{})
go reconciler.Run(ch)
defer close(ch)
// Assert
waitForNewAttacherCallCount(t, 1 /* expectedCallCount */, fakePlugin)
verifyNewAttacherCallCount(t, false /* expectZeroNewAttacherCallCount */, fakePlugin)
waitForAttachCallCount(t, 1 /* expectedAttachCallCount */, fakePlugin)
verifyNewDetacherCallCount(t, true /* expectZeroNewDetacherCallCount */, fakePlugin)
waitForDetachCallCount(t, 0 /* expectedDetachCallCount */, fakePlugin)
// Act
dsw.DeletePod(types.UniquePodName(podName), generatedVolumeName, nodeName)
volumeExists = dsw.VolumeExists(generatedVolumeName, nodeName)
if volumeExists {
t.Fatalf(
"Deleted pod %q from volume %q/node %q. Volume should also be deleted but it still exists.",
podName,
generatedVolumeName,
nodeName)
}
asw.SetVolumeMountedByNode(generatedVolumeName, nodeName, true /* mounted */)
asw.SetVolumeMountedByNode(generatedVolumeName, nodeName, false /* mounted */)
// Assert
waitForNewDetacherCallCount(t, 1 /* expectedCallCount */, fakePlugin)
verifyNewAttacherCallCount(t, false /* expectZeroNewAttacherCallCount */, fakePlugin)
waitForAttachCallCount(t, 1 /* expectedAttachCallCount */, fakePlugin)
verifyNewDetacherCallCount(t, false /* expectZeroNewDetacherCallCount */, fakePlugin)
waitForDetachCallCount(t, 1 /* expectedDetachCallCount */, fakePlugin)
}
// Populates desiredStateOfWorld cache with one node/volume/pod tuple.
// Calls Run()
// Verifies there is one attach call and no detach calls.
func Test_Run_Positive_OneDesiredVolumeAttach(t *testing.T) {
// Arrange
volumePluginMgr, fakePlugin := volumetesting.GetTestVolumePluginMgr(t)
dsw := cache.NewDesiredStateOfWorld(volumePluginMgr)
asw := cache.NewActualStateOfWorld(volumePluginMgr)
fakeKubeClient := controllervolumetesting.CreateTestClient()
fakeRecorder := &record.FakeRecorder{}
ad := operationexecutor.NewOperationExecutor(operationexecutor.NewOperationGenerator(fakeKubeClient, volumePluginMgr, fakeRecorder, false /* checkNodeCapabilitiesBeforeMount */))
nsu := statusupdater.NewFakeNodeStatusUpdater(false /* returnError */)
reconciler := NewReconciler(
reconcilerLoopPeriod, maxWaitForUnmountDuration, syncLoopPeriod, false, dsw, asw, ad, nsu)
podName := "pod-uid"
volumeName := v1.UniqueVolumeName("volume-name")
volumeSpec := controllervolumetesting.GetTestVolumeSpec(string(volumeName), volumeName)
nodeName := k8stypes.NodeName("node-name")
dsw.AddNode(nodeName)
volumeExists := dsw.VolumeExists(volumeName, nodeName)
if volumeExists {
t.Fatalf(
"Volume %q/node %q should not exist, but it does.",
volumeName,
nodeName)
}
_, podErr := dsw.AddPod(types.UniquePodName(podName), controllervolumetesting.NewPod(podName, podName), volumeSpec, nodeName)
if podErr != nil {
t.Fatalf("AddPod failed. Expected: <no error> Actual: <%v>", podErr)
}
// Act
ch := make(chan struct{})
go reconciler.Run(ch)
defer close(ch)
// Assert
waitForNewAttacherCallCount(t, 1 /* expectedCallCount */, fakePlugin)
waitForAttachCallCount(t, 1 /* expectedAttachCallCount */, fakePlugin)
verifyNewDetacherCallCount(t, true /* expectZeroNewDetacherCallCount */, fakePlugin)
}
// NewAttachDetachController returns a new instance of AttachDetachController.
func NewAttachDetachController(
kubeClient internalclientset.Interface,
podInformer framework.SharedInformer,
nodeInformer framework.SharedInformer,
pvcInformer framework.SharedInformer,
pvInformer framework.SharedInformer,
cloud cloudprovider.Interface,
plugins []volume.VolumePlugin,
recorder record.EventRecorder) (AttachDetachController, error) {
// TODO: The default resyncPeriod for shared informers is 12 hours, this is
// unacceptable for the attach/detach controller. For example, if a pod is
// skipped because the node it is scheduled to didn't set its annotation in
// time, we don't want to have to wait 12hrs before processing the pod
// again.
// Luckily https://github.com/kubernetes/kubernetes/issues/23394 is being
// worked on and will split resync in to resync and relist. Once that
// happens the resync period can be set to something much faster (30
// seconds).
// If that issue is not resolved in time, then this controller will have to
// consider some unappealing alternate options: use a non-shared informer
// and set a faster resync period even if it causes relist, or requeue
// dropped pods so they are continuously processed until it is accepted or
// deleted (probably can't do this with sharedInformer), etc.
adc := &attachDetachController{
kubeClient: kubeClient,
pvcInformer: pvcInformer,
pvInformer: pvInformer,
cloud: cloud,
}
podInformer.AddEventHandler(framework.ResourceEventHandlerFuncs{
AddFunc: adc.podAdd,
UpdateFunc: adc.podUpdate,
DeleteFunc: adc.podDelete,
})
nodeInformer.AddEventHandler(framework.ResourceEventHandlerFuncs{
AddFunc: adc.nodeAdd,
UpdateFunc: adc.nodeUpdate,
DeleteFunc: adc.nodeDelete,
})
if err := adc.volumePluginMgr.InitPlugins(plugins, adc); err != nil {
return nil, fmt.Errorf("Could not initialize volume plugins for Attach/Detach Controller: %+v", err)
}
adc.desiredStateOfWorld = cache.NewDesiredStateOfWorld(&adc.volumePluginMgr)
adc.actualStateOfWorld = cache.NewActualStateOfWorld(&adc.volumePluginMgr)
adc.attacherDetacher =
operationexecutor.NewOperationExecutor(
kubeClient,
&adc.volumePluginMgr,
recorder)
adc.nodeStatusUpdater = statusupdater.NewNodeStatusUpdater(
kubeClient, nodeInformer, adc.actualStateOfWorld)
adc.reconciler = reconciler.NewReconciler(
reconcilerLoopPeriod,
reconcilerMaxWaitForUnmountDuration,
adc.desiredStateOfWorld,
adc.actualStateOfWorld,
adc.attacherDetacher,
adc.nodeStatusUpdater)
adc.desiredStateOfWorldPopulator = populator.NewDesiredStateOfWorldPopulator(
desiredStateOfWorldPopulatorLoopSleepPeriod,
podInformer,
adc.desiredStateOfWorld)
return adc, nil
}