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https://github.com/k3s-io/kubernetes.git
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Merge pull request #42033 from NickrenREN/dswp-findAndAddActivePods
Automatic merge from submit-queue (batch tested with PRs 41849, 42033) fix TODO: find and add active pods for dswp loops through the list of active pods and ensures that each one exists in the desired state of the world cache **Release note**: ```release-note NONE ```
This commit is contained in:
Kubernetes Submit Queue
GitHub
commit
e91bd12b99
@ -177,6 +177,7 @@ pkg/cloudprovider/providers/cloudstack
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pkg/controller/volume/attachdetach/cache
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pkg/controller/volume/attachdetach/populator
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pkg/controller/volume/attachdetach/reconciler
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pkg/controller/volume/attachdetach/util
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pkg/conversion
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pkg/conversion/queryparams
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pkg/credentialprovider/aws
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@ -24,6 +24,7 @@ go_library(
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"//pkg/controller/volume/attachdetach/populator:go_default_library",
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"//pkg/controller/volume/attachdetach/reconciler:go_default_library",
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"//pkg/controller/volume/attachdetach/statusupdater:go_default_library",
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"//pkg/controller/volume/attachdetach/util:go_default_library",
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"//pkg/util/io:go_default_library",
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"//pkg/util/mount:go_default_library",
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"//pkg/volume:go_default_library",
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@ -67,6 +68,7 @@ filegroup(
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"//pkg/controller/volume/attachdetach/reconciler:all-srcs",
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"//pkg/controller/volume/attachdetach/statusupdater:all-srcs",
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"//pkg/controller/volume/attachdetach/testing:all-srcs",
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"//pkg/controller/volume/attachdetach/util:all-srcs",
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],
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tags = ["automanaged"],
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)
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@ -41,6 +41,7 @@ import (
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/populator"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/reconciler"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/statusupdater"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/util"
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"k8s.io/kubernetes/pkg/util/io"
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"k8s.io/kubernetes/pkg/util/mount"
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"k8s.io/kubernetes/pkg/volume"
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@ -62,6 +63,11 @@ const (
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// desiredStateOfWorldPopulatorLoopSleepPeriod is the amount of time the
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// DesiredStateOfWorldPopulator loop waits between successive executions
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desiredStateOfWorldPopulatorLoopSleepPeriod time.Duration = 1 * time.Minute
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// desiredStateOfWorldPopulatorListPodsRetryDuration is the amount of
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// time the DesiredStateOfWorldPopulator loop waits between list pods
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// calls.
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desiredStateOfWorldPopulatorListPodsRetryDuration time.Duration = 3 * time.Minute
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)
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// AttachDetachController defines the operations supported by this controller.
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@ -137,8 +143,12 @@ func NewAttachDetachController(
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adc.desiredStateOfWorldPopulator = populator.NewDesiredStateOfWorldPopulator(
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desiredStateOfWorldPopulatorLoopSleepPeriod,
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desiredStateOfWorldPopulatorListPodsRetryDuration,
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podInformer.Lister(),
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adc.desiredStateOfWorld)
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adc.desiredStateOfWorld,
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&adc.volumePluginMgr,
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pvcInformer.Lister(),
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pvInformer.Lister())
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podInformer.Informer().AddEventHandler(kcache.ResourceEventHandlerFuncs{
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AddFunc: adc.podAdd,
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@ -245,7 +255,8 @@ func (adc *attachDetachController) podAdd(obj interface{}) {
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return
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}
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adc.processPodVolumes(pod, true /* addVolumes */)
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util.ProcessPodVolumes(pod, true, /* addVolumes */
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adc.desiredStateOfWorld, &adc.volumePluginMgr, adc.pvcLister, adc.pvLister)
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}
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// GetDesiredStateOfWorld returns desired state of world associated with controller
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@ -264,7 +275,8 @@ func (adc *attachDetachController) podDelete(obj interface{}) {
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return
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}
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adc.processPodVolumes(pod, false /* addVolumes */)
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util.ProcessPodVolumes(pod, false, /* addVolumes */
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adc.desiredStateOfWorld, &adc.volumePluginMgr, adc.pvcLister, adc.pvLister)
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}
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func (adc *attachDetachController) nodeAdd(obj interface{}) {
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@ -313,225 +325,6 @@ func (adc *attachDetachController) nodeDelete(obj interface{}) {
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adc.processVolumesInUse(nodeName, node.Status.VolumesInUse)
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}
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// processPodVolumes processes the volumes in the given pod and adds them to the
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// desired state of the world if addVolumes is true, otherwise it removes them.
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func (adc *attachDetachController) processPodVolumes(
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pod *v1.Pod, addVolumes bool) {
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if pod == nil {
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return
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}
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if len(pod.Spec.Volumes) <= 0 {
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return
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}
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nodeName := types.NodeName(pod.Spec.NodeName)
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if !adc.desiredStateOfWorld.NodeExists(nodeName) {
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// If the node the pod is scheduled to does not exist in the desired
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// state of the world data structure, that indicates the node is not
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// yet managed by the controller. Therefore, ignore the pod.
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// If the node is added to the list of managed nodes in the future,
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// future adds and updates to the pod will be processed.
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glog.V(10).Infof(
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"Skipping processing of pod %q/%q: it is scheduled to node %q which is not managed by the controller.",
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pod.Namespace,
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pod.Name,
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nodeName)
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return
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}
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// Process volume spec for each volume defined in pod
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for _, podVolume := range pod.Spec.Volumes {
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volumeSpec, err := adc.createVolumeSpec(podVolume, pod.Namespace)
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if err != nil {
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glog.V(10).Infof(
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"Error processing volume %q for pod %q/%q: %v",
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podVolume.Name,
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pod.Namespace,
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pod.Name,
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err)
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continue
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}
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attachableVolumePlugin, err :=
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adc.volumePluginMgr.FindAttachablePluginBySpec(volumeSpec)
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if err != nil || attachableVolumePlugin == nil {
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glog.V(10).Infof(
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"Skipping volume %q for pod %q/%q: it does not implement attacher interface. err=%v",
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podVolume.Name,
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pod.Namespace,
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pod.Name,
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err)
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continue
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}
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uniquePodName := volumehelper.GetUniquePodName(pod)
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if addVolumes {
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// Add volume to desired state of world
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_, err := adc.desiredStateOfWorld.AddPod(
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uniquePodName, pod, volumeSpec, nodeName)
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if err != nil {
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glog.V(10).Infof(
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"Failed to add volume %q for pod %q/%q to desiredStateOfWorld. %v",
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podVolume.Name,
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pod.Namespace,
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pod.Name,
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err)
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}
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} else {
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// Remove volume from desired state of world
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uniqueVolumeName, err := volumehelper.GetUniqueVolumeNameFromSpec(
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attachableVolumePlugin, volumeSpec)
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if err != nil {
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glog.V(10).Infof(
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"Failed to delete volume %q for pod %q/%q from desiredStateOfWorld. GetUniqueVolumeNameFromSpec failed with %v",
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podVolume.Name,
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pod.Namespace,
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pod.Name,
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err)
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continue
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}
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adc.desiredStateOfWorld.DeletePod(
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uniquePodName, uniqueVolumeName, nodeName)
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}
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}
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return
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}
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// createVolumeSpec creates and returns a mutatable volume.Spec object for the
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// specified volume. It dereference any PVC to get PV objects, if needed.
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func (adc *attachDetachController) createVolumeSpec(
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podVolume v1.Volume, podNamespace string) (*volume.Spec, error) {
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if pvcSource := podVolume.VolumeSource.PersistentVolumeClaim; pvcSource != nil {
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glog.V(10).Infof(
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"Found PVC, ClaimName: %q/%q",
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podNamespace,
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pvcSource.ClaimName)
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// If podVolume is a PVC, fetch the real PV behind the claim
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pvName, pvcUID, err := adc.getPVCFromCacheExtractPV(
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podNamespace, pvcSource.ClaimName)
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if err != nil {
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return nil, fmt.Errorf(
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"error processing PVC %q/%q: %v",
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podNamespace,
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pvcSource.ClaimName,
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err)
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}
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glog.V(10).Infof(
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"Found bound PV for PVC (ClaimName %q/%q pvcUID %v): pvName=%q",
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podNamespace,
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pvcSource.ClaimName,
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pvcUID,
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pvName)
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// Fetch actual PV object
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volumeSpec, err := adc.getPVSpecFromCache(
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pvName, pvcSource.ReadOnly, pvcUID)
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if err != nil {
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return nil, fmt.Errorf(
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"error processing PVC %q/%q: %v",
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podNamespace,
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pvcSource.ClaimName,
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err)
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}
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glog.V(10).Infof(
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"Extracted volumeSpec (%v) from bound PV (pvName %q) and PVC (ClaimName %q/%q pvcUID %v)",
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volumeSpec.Name,
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pvName,
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podNamespace,
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pvcSource.ClaimName,
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pvcUID)
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return volumeSpec, nil
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}
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// Do not return the original volume object, since it's from the shared
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// informer it may be mutated by another consumer.
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clonedPodVolumeObj, err := api.Scheme.DeepCopy(&podVolume)
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if err != nil || clonedPodVolumeObj == nil {
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return nil, fmt.Errorf(
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"failed to deep copy %q volume object. err=%v", podVolume.Name, err)
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}
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clonedPodVolume, ok := clonedPodVolumeObj.(*v1.Volume)
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if !ok {
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return nil, fmt.Errorf("failed to cast clonedPodVolume %#v to v1.Volume", clonedPodVolumeObj)
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}
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return volume.NewSpecFromVolume(clonedPodVolume), nil
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}
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// getPVCFromCacheExtractPV fetches the PVC object with the given namespace and
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// name from the shared internal PVC store extracts the name of the PV it is
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// pointing to and returns it.
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// This method returns an error if a PVC object does not exist in the cache
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// with the given namespace/name.
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// This method returns an error if the PVC object's phase is not "Bound".
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func (adc *attachDetachController) getPVCFromCacheExtractPV(namespace string, name string) (string, types.UID, error) {
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pvc, err := adc.pvcLister.PersistentVolumeClaims(namespace).Get(name)
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if err != nil {
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return "", "", fmt.Errorf("failed to find PVC %s/%s in PVCInformer cache: %v", namespace, name, err)
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}
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if pvc.Status.Phase != v1.ClaimBound || pvc.Spec.VolumeName == "" {
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return "", "", fmt.Errorf(
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"PVC %s/%s has non-bound phase (%q) or empty pvc.Spec.VolumeName (%q)",
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namespace,
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name,
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pvc.Status.Phase,
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pvc.Spec.VolumeName)
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}
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return pvc.Spec.VolumeName, pvc.UID, nil
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}
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// getPVSpecFromCache fetches the PV object with the given name from the shared
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// internal PV store and returns a volume.Spec representing it.
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// This method returns an error if a PV object does not exist in the cache with
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// the given name.
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// This method deep copies the PV object so the caller may use the returned
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// volume.Spec object without worrying about it mutating unexpectedly.
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func (adc *attachDetachController) getPVSpecFromCache(name string, pvcReadOnly bool, expectedClaimUID types.UID) (*volume.Spec, error) {
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pv, err := adc.pvLister.Get(name)
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if err != nil {
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return nil, fmt.Errorf("failed to find PV %q in PVInformer cache: %v", name, err)
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}
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|
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if pv.Spec.ClaimRef == nil {
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return nil, fmt.Errorf(
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"found PV object %q but it has a nil pv.Spec.ClaimRef indicating it is not yet bound to the claim",
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name)
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}
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|
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if pv.Spec.ClaimRef.UID != expectedClaimUID {
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return nil, fmt.Errorf(
|
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"found PV object %q but its pv.Spec.ClaimRef.UID (%q) does not point to claim.UID (%q)",
|
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name,
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pv.Spec.ClaimRef.UID,
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expectedClaimUID)
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}
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|
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// Do not return the object from the informer, since the store is shared it
|
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// may be mutated by another consumer.
|
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clonedPVObj, err := api.Scheme.DeepCopy(pv)
|
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if err != nil || clonedPVObj == nil {
|
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return nil, fmt.Errorf("failed to deep copy %q PV object. err=%v", name, err)
|
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}
|
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|
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clonedPV, ok := clonedPVObj.(*v1.PersistentVolume)
|
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if !ok {
|
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return nil, fmt.Errorf("failed to cast %q clonedPV %#v to PersistentVolume", name, pv)
|
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}
|
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|
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return volume.NewSpecFromPersistentVolume(clonedPV, pvcReadOnly), nil
|
||||
}
|
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|
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// processVolumesInUse processes the list of volumes marked as "in-use"
|
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// according to the specified Node's Status.VolumesInUse and updates the
|
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// corresponding volume in the actual state of the world to indicate that it is
|
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|
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@ -5,6 +5,7 @@ licenses(["notice"])
|
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load(
|
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"@io_bazel_rules_go//go:def.bzl",
|
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"go_library",
|
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"go_test",
|
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)
|
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|
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go_library(
|
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@ -14,9 +15,12 @@ go_library(
|
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deps = [
|
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"//pkg/client/listers/core/v1:go_default_library",
|
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"//pkg/controller/volume/attachdetach/cache:go_default_library",
|
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"//pkg/controller/volume/attachdetach/util:go_default_library",
|
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"//pkg/volume:go_default_library",
|
||||
"//pkg/volume/util/volumehelper:go_default_library",
|
||||
"//vendor/github.com/golang/glog:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/api/errors:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/util/runtime:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
|
||||
"//vendor/k8s.io/client-go/tools/cache:go_default_library",
|
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@ -35,3 +39,21 @@ filegroup(
|
||||
srcs = [":package-srcs"],
|
||||
tags = ["automanaged"],
|
||||
)
|
||||
|
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go_test(
|
||||
name = "go_default_test",
|
||||
srcs = ["desired_state_of_world_populator_test.go"],
|
||||
library = ":go_default_library",
|
||||
tags = ["automanaged"],
|
||||
deps = [
|
||||
"//pkg/api/v1:go_default_library",
|
||||
"//pkg/client/clientset_generated/clientset/fake:go_default_library",
|
||||
"//pkg/client/informers/informers_generated/externalversions:go_default_library",
|
||||
"//pkg/controller:go_default_library",
|
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"//pkg/controller/volume/attachdetach/cache:go_default_library",
|
||||
"//pkg/volume/testing:go_default_library",
|
||||
"//pkg/volume/util/volumehelper:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
|
||||
],
|
||||
)
|
||||
|
||||
@ -25,17 +25,20 @@ import (
|
||||
"github.com/golang/glog"
|
||||
|
||||
"k8s.io/apimachinery/pkg/api/errors"
|
||||
"k8s.io/apimachinery/pkg/labels"
|
||||
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
|
||||
"k8s.io/apimachinery/pkg/util/wait"
|
||||
kcache "k8s.io/client-go/tools/cache"
|
||||
corelisters "k8s.io/kubernetes/pkg/client/listers/core/v1"
|
||||
"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
|
||||
"k8s.io/kubernetes/pkg/controller/volume/attachdetach/util"
|
||||
"k8s.io/kubernetes/pkg/volume"
|
||||
"k8s.io/kubernetes/pkg/volume/util/volumehelper"
|
||||
)
|
||||
|
||||
// DesiredStateOfWorldPopulator periodically verifies that the pods in the
|
||||
// desired state of th world still exist, if not, it removes them.
|
||||
// TODO: it also loops through the list of active pods and ensures that
|
||||
// desired state of the world still exist, if not, it removes them.
|
||||
// It also loops through the list of active pods and ensures that
|
||||
// each one exists in the desired state of the world cache
|
||||
// if it has volumes.
|
||||
type DesiredStateOfWorldPopulator interface {
|
||||
@ -50,19 +53,32 @@ type DesiredStateOfWorldPopulator interface {
|
||||
// desiredStateOfWorld - the cache to populate
|
||||
func NewDesiredStateOfWorldPopulator(
|
||||
loopSleepDuration time.Duration,
|
||||
listPodsRetryDuration time.Duration,
|
||||
podLister corelisters.PodLister,
|
||||
desiredStateOfWorld cache.DesiredStateOfWorld) DesiredStateOfWorldPopulator {
|
||||
desiredStateOfWorld cache.DesiredStateOfWorld,
|
||||
volumePluginMgr *volume.VolumePluginMgr,
|
||||
pvcLister corelisters.PersistentVolumeClaimLister,
|
||||
pvLister corelisters.PersistentVolumeLister) DesiredStateOfWorldPopulator {
|
||||
return &desiredStateOfWorldPopulator{
|
||||
loopSleepDuration: loopSleepDuration,
|
||||
podLister: podLister,
|
||||
desiredStateOfWorld: desiredStateOfWorld,
|
||||
loopSleepDuration: loopSleepDuration,
|
||||
listPodsRetryDuration: listPodsRetryDuration,
|
||||
podLister: podLister,
|
||||
desiredStateOfWorld: desiredStateOfWorld,
|
||||
volumePluginMgr: volumePluginMgr,
|
||||
pvcLister: pvcLister,
|
||||
pvLister: pvLister,
|
||||
}
|
||||
}
|
||||
|
||||
type desiredStateOfWorldPopulator struct {
|
||||
loopSleepDuration time.Duration
|
||||
podLister corelisters.PodLister
|
||||
desiredStateOfWorld cache.DesiredStateOfWorld
|
||||
loopSleepDuration time.Duration
|
||||
podLister corelisters.PodLister
|
||||
desiredStateOfWorld cache.DesiredStateOfWorld
|
||||
volumePluginMgr *volume.VolumePluginMgr
|
||||
pvcLister corelisters.PersistentVolumeClaimLister
|
||||
pvLister corelisters.PersistentVolumeLister
|
||||
listPodsRetryDuration time.Duration
|
||||
timeOfLastListPods time.Time
|
||||
}
|
||||
|
||||
func (dswp *desiredStateOfWorldPopulator) Run(stopCh <-chan struct{}) {
|
||||
@ -72,6 +88,18 @@ func (dswp *desiredStateOfWorldPopulator) Run(stopCh <-chan struct{}) {
|
||||
func (dswp *desiredStateOfWorldPopulator) populatorLoopFunc() func() {
|
||||
return func() {
|
||||
dswp.findAndRemoveDeletedPods()
|
||||
|
||||
// findAndAddActivePods is called periodically, independently of the main
|
||||
// populator loop.
|
||||
if time.Since(dswp.timeOfLastListPods) < dswp.listPodsRetryDuration {
|
||||
glog.V(5).Infof(
|
||||
"Skipping findAndAddActivePods(). Not permitted until %v (listPodsRetryDuration %v).",
|
||||
dswp.timeOfLastListPods.Add(dswp.listPodsRetryDuration),
|
||||
dswp.listPodsRetryDuration)
|
||||
|
||||
return
|
||||
}
|
||||
dswp.findAndAddActivePods()
|
||||
}
|
||||
}
|
||||
|
||||
@ -113,3 +141,23 @@ func (dswp *desiredStateOfWorldPopulator) findAndRemoveDeletedPods() {
|
||||
dswp.desiredStateOfWorld.DeletePod(dswPodUID, dswPodToAdd.VolumeName, dswPodToAdd.NodeName)
|
||||
}
|
||||
}
|
||||
|
||||
func (dswp *desiredStateOfWorldPopulator) findAndAddActivePods() {
|
||||
pods, err := dswp.podLister.List(labels.Everything())
|
||||
if err != nil {
|
||||
glog.Errorf("podLister List failed: %v", err)
|
||||
return
|
||||
}
|
||||
dswp.timeOfLastListPods = time.Now()
|
||||
|
||||
for _, pod := range pods {
|
||||
if volumehelper.IsPodTerminated(pod, pod.Status) {
|
||||
// Do not add volumes for terminated pods
|
||||
continue
|
||||
}
|
||||
util.ProcessPodVolumes(pod, true,
|
||||
dswp.desiredStateOfWorld, dswp.volumePluginMgr, dswp.pvcLister, dswp.pvLister)
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -0,0 +1,137 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package populator
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||||
k8stypes "k8s.io/apimachinery/pkg/types"
|
||||
"k8s.io/kubernetes/pkg/api/v1"
|
||||
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset/fake"
|
||||
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/externalversions"
|
||||
"k8s.io/kubernetes/pkg/controller"
|
||||
"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
|
||||
volumetesting "k8s.io/kubernetes/pkg/volume/testing"
|
||||
"k8s.io/kubernetes/pkg/volume/util/volumehelper"
|
||||
)
|
||||
|
||||
func TestFindAndAddActivePods_FindAndRemoveDeletedPods(t *testing.T) {
|
||||
fakeVolumePluginMgr, _ := volumetesting.GetTestVolumePluginMgr(t)
|
||||
fakeClient := &fake.Clientset{}
|
||||
|
||||
fakeInformerFactory := informers.NewSharedInformerFactory(fakeClient, controller.NoResyncPeriodFunc())
|
||||
fakePodInformer := fakeInformerFactory.Core().V1().Pods()
|
||||
|
||||
fakesDSW := cache.NewDesiredStateOfWorld(fakeVolumePluginMgr)
|
||||
|
||||
pod := &v1.Pod{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "dswp-test-pod",
|
||||
UID: "dswp-test-pod-uid",
|
||||
Namespace: "dswp-test",
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
NodeName: "dswp-test-host",
|
||||
Volumes: []v1.Volume{
|
||||
{
|
||||
Name: "dswp-test-volume-name",
|
||||
VolumeSource: v1.VolumeSource{
|
||||
GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
|
||||
PDName: "dswp-test-fake-device",
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodPhase("Running"),
|
||||
},
|
||||
}
|
||||
|
||||
fakePodInformer.Informer().GetStore().Add(pod)
|
||||
|
||||
podName := volumehelper.GetUniquePodName(pod)
|
||||
|
||||
generatedVolumeName := "fake-plugin/" + pod.Spec.Volumes[0].Name
|
||||
|
||||
pvcLister := fakeInformerFactory.Core().V1().PersistentVolumeClaims().Lister()
|
||||
pvLister := fakeInformerFactory.Core().V1().PersistentVolumes().Lister()
|
||||
|
||||
dswp := &desiredStateOfWorldPopulator{
|
||||
loopSleepDuration: 100 * time.Millisecond,
|
||||
listPodsRetryDuration: 3 * time.Second,
|
||||
desiredStateOfWorld: fakesDSW,
|
||||
volumePluginMgr: fakeVolumePluginMgr,
|
||||
podLister: fakePodInformer.Lister(),
|
||||
pvcLister: pvcLister,
|
||||
pvLister: pvLister,
|
||||
}
|
||||
|
||||
//add the given node to the list of nodes managed by dsw
|
||||
dswp.desiredStateOfWorld.AddNode(k8stypes.NodeName(pod.Spec.NodeName))
|
||||
|
||||
dswp.findAndAddActivePods()
|
||||
|
||||
expectedVolumeName := v1.UniqueVolumeName(generatedVolumeName)
|
||||
|
||||
//check if the given volume referenced by the pod is added to dsw
|
||||
volumeExists := dswp.desiredStateOfWorld.VolumeExists(expectedVolumeName, k8stypes.NodeName(pod.Spec.NodeName))
|
||||
if !volumeExists {
|
||||
t.Fatalf(
|
||||
"VolumeExists(%q) failed. Expected: <true> Actual: <%v>",
|
||||
expectedVolumeName,
|
||||
volumeExists)
|
||||
}
|
||||
|
||||
//delete the pod and volume manually
|
||||
dswp.desiredStateOfWorld.DeletePod(podName, expectedVolumeName, k8stypes.NodeName(pod.Spec.NodeName))
|
||||
|
||||
//check if the given volume referenced by the pod still exists in dsw
|
||||
volumeExists = dswp.desiredStateOfWorld.VolumeExists(expectedVolumeName, k8stypes.NodeName(pod.Spec.NodeName))
|
||||
if volumeExists {
|
||||
t.Fatalf(
|
||||
"VolumeExists(%q) failed. Expected: <false> Actual: <%v>",
|
||||
expectedVolumeName,
|
||||
volumeExists)
|
||||
}
|
||||
|
||||
//add pod and volume again
|
||||
dswp.findAndAddActivePods()
|
||||
|
||||
//check if the given volume referenced by the pod is added to dsw for the second time
|
||||
volumeExists = dswp.desiredStateOfWorld.VolumeExists(expectedVolumeName, k8stypes.NodeName(pod.Spec.NodeName))
|
||||
if !volumeExists {
|
||||
t.Fatalf(
|
||||
"VolumeExists(%q) failed. Expected: <true> Actual: <%v>",
|
||||
expectedVolumeName,
|
||||
volumeExists)
|
||||
}
|
||||
|
||||
fakePodInformer.Informer().GetStore().Delete(pod)
|
||||
dswp.findAndRemoveDeletedPods()
|
||||
//check if the given volume referenced by the pod still exists in dsw
|
||||
volumeExists = dswp.desiredStateOfWorld.VolumeExists(expectedVolumeName, k8stypes.NodeName(pod.Spec.NodeName))
|
||||
if volumeExists {
|
||||
t.Fatalf(
|
||||
"VolumeExists(%q) failed. Expected: <false> Actual: <%v>",
|
||||
expectedVolumeName,
|
||||
volumeExists)
|
||||
}
|
||||
|
||||
}
|
||||
37
pkg/controller/volume/attachdetach/util/BUILD
Normal file
37
pkg/controller/volume/attachdetach/util/BUILD
Normal file
@ -0,0 +1,37 @@
|
||||
package(default_visibility = ["//visibility:public"])
|
||||
|
||||
licenses(["notice"])
|
||||
|
||||
load(
|
||||
"@io_bazel_rules_go//go:def.bzl",
|
||||
"go_library",
|
||||
)
|
||||
|
||||
go_library(
|
||||
name = "go_default_library",
|
||||
srcs = ["util.go"],
|
||||
tags = ["automanaged"],
|
||||
deps = [
|
||||
"//pkg/api:go_default_library",
|
||||
"//pkg/api/v1:go_default_library",
|
||||
"//pkg/client/listers/core/v1:go_default_library",
|
||||
"//pkg/controller/volume/attachdetach/cache:go_default_library",
|
||||
"//pkg/volume:go_default_library",
|
||||
"//pkg/volume/util/volumehelper:go_default_library",
|
||||
"//vendor/github.com/golang/glog:go_default_library",
|
||||
"//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
|
||||
],
|
||||
)
|
||||
|
||||
filegroup(
|
||||
name = "package-srcs",
|
||||
srcs = glob(["**"]),
|
||||
tags = ["automanaged"],
|
||||
visibility = ["//visibility:private"],
|
||||
)
|
||||
|
||||
filegroup(
|
||||
name = "all-srcs",
|
||||
srcs = [":package-srcs"],
|
||||
tags = ["automanaged"],
|
||||
)
|
||||
252
pkg/controller/volume/attachdetach/util/util.go
Normal file
252
pkg/controller/volume/attachdetach/util/util.go
Normal file
@ -0,0 +1,252 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package util
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/golang/glog"
|
||||
"k8s.io/apimachinery/pkg/types"
|
||||
"k8s.io/kubernetes/pkg/api"
|
||||
"k8s.io/kubernetes/pkg/api/v1"
|
||||
corelisters "k8s.io/kubernetes/pkg/client/listers/core/v1"
|
||||
"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
|
||||
"k8s.io/kubernetes/pkg/volume"
|
||||
"k8s.io/kubernetes/pkg/volume/util/volumehelper"
|
||||
)
|
||||
|
||||
// CreateVolumeSpec creates and returns a mutatable volume.Spec object for the
|
||||
// specified volume. It dereference any PVC to get PV objects, if needed.
|
||||
func CreateVolumeSpec(podVolume v1.Volume, podNamespace string, pvcLister corelisters.PersistentVolumeClaimLister, pvLister corelisters.PersistentVolumeLister) (*volume.Spec, error) {
|
||||
if pvcSource := podVolume.VolumeSource.PersistentVolumeClaim; pvcSource != nil {
|
||||
glog.V(10).Infof(
|
||||
"Found PVC, ClaimName: %q/%q",
|
||||
podNamespace,
|
||||
pvcSource.ClaimName)
|
||||
|
||||
// If podVolume is a PVC, fetch the real PV behind the claim
|
||||
pvName, pvcUID, err := getPVCFromCacheExtractPV(
|
||||
podNamespace, pvcSource.ClaimName, pvcLister)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf(
|
||||
"error processing PVC %q/%q: %v",
|
||||
podNamespace,
|
||||
pvcSource.ClaimName,
|
||||
err)
|
||||
}
|
||||
|
||||
glog.V(10).Infof(
|
||||
"Found bound PV for PVC (ClaimName %q/%q pvcUID %v): pvName=%q",
|
||||
podNamespace,
|
||||
pvcSource.ClaimName,
|
||||
pvcUID,
|
||||
pvName)
|
||||
|
||||
// Fetch actual PV object
|
||||
volumeSpec, err := getPVSpecFromCache(
|
||||
pvName, pvcSource.ReadOnly, pvcUID, pvLister)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf(
|
||||
"error processing PVC %q/%q: %v",
|
||||
podNamespace,
|
||||
pvcSource.ClaimName,
|
||||
err)
|
||||
}
|
||||
|
||||
glog.V(10).Infof(
|
||||
"Extracted volumeSpec (%v) from bound PV (pvName %q) and PVC (ClaimName %q/%q pvcUID %v)",
|
||||
volumeSpec.Name,
|
||||
pvName,
|
||||
podNamespace,
|
||||
pvcSource.ClaimName,
|
||||
pvcUID)
|
||||
|
||||
return volumeSpec, nil
|
||||
}
|
||||
|
||||
// Do not return the original volume object, since it's from the shared
|
||||
// informer it may be mutated by another consumer.
|
||||
clonedPodVolumeObj, err := api.Scheme.DeepCopy(&podVolume)
|
||||
if err != nil || clonedPodVolumeObj == nil {
|
||||
return nil, fmt.Errorf(
|
||||
"failed to deep copy %q volume object. err=%v", podVolume.Name, err)
|
||||
}
|
||||
|
||||
clonedPodVolume, ok := clonedPodVolumeObj.(*v1.Volume)
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("failed to cast clonedPodVolume %#v to v1.Volume", clonedPodVolumeObj)
|
||||
}
|
||||
|
||||
return volume.NewSpecFromVolume(clonedPodVolume), nil
|
||||
}
|
||||
|
||||
// getPVCFromCacheExtractPV fetches the PVC object with the given namespace and
|
||||
// name from the shared internal PVC store extracts the name of the PV it is
|
||||
// pointing to and returns it.
|
||||
// This method returns an error if a PVC object does not exist in the cache
|
||||
// with the given namespace/name.
|
||||
// This method returns an error if the PVC object's phase is not "Bound".
|
||||
func getPVCFromCacheExtractPV(namespace string, name string, pvcLister corelisters.PersistentVolumeClaimLister) (string, types.UID, error) {
|
||||
pvc, err := pvcLister.PersistentVolumeClaims(namespace).Get(name)
|
||||
if err != nil {
|
||||
return "", "", fmt.Errorf("failed to find PVC %s/%s in PVCInformer cache: %v", namespace, name, err)
|
||||
}
|
||||
|
||||
if pvc.Status.Phase != v1.ClaimBound || pvc.Spec.VolumeName == "" {
|
||||
return "", "", fmt.Errorf(
|
||||
"PVC %s/%s has non-bound phase (%q) or empty pvc.Spec.VolumeName (%q)",
|
||||
namespace,
|
||||
name,
|
||||
pvc.Status.Phase,
|
||||
pvc.Spec.VolumeName)
|
||||
}
|
||||
|
||||
return pvc.Spec.VolumeName, pvc.UID, nil
|
||||
}
|
||||
|
||||
// getPVSpecFromCache fetches the PV object with the given name from the shared
|
||||
// internal PV store and returns a volume.Spec representing it.
|
||||
// This method returns an error if a PV object does not exist in the cache with
|
||||
// the given name.
|
||||
// This method deep copies the PV object so the caller may use the returned
|
||||
// volume.Spec object without worrying about it mutating unexpectedly.
|
||||
func getPVSpecFromCache(name string, pvcReadOnly bool, expectedClaimUID types.UID, pvLister corelisters.PersistentVolumeLister) (*volume.Spec, error) {
|
||||
pv, err := pvLister.Get(name)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to find PV %q in PVInformer cache: %v", name, err)
|
||||
}
|
||||
|
||||
if pv.Spec.ClaimRef == nil {
|
||||
return nil, fmt.Errorf(
|
||||
"found PV object %q but it has a nil pv.Spec.ClaimRef indicating it is not yet bound to the claim",
|
||||
name)
|
||||
}
|
||||
|
||||
if pv.Spec.ClaimRef.UID != expectedClaimUID {
|
||||
return nil, fmt.Errorf(
|
||||
"found PV object %q but its pv.Spec.ClaimRef.UID (%q) does not point to claim.UID (%q)",
|
||||
name,
|
||||
pv.Spec.ClaimRef.UID,
|
||||
expectedClaimUID)
|
||||
}
|
||||
|
||||
// Do not return the object from the informer, since the store is shared it
|
||||
// may be mutated by another consumer.
|
||||
clonedPVObj, err := api.Scheme.DeepCopy(pv)
|
||||
if err != nil || clonedPVObj == nil {
|
||||
return nil, fmt.Errorf("failed to deep copy %q PV object. err=%v", name, err)
|
||||
}
|
||||
|
||||
clonedPV, ok := clonedPVObj.(*v1.PersistentVolume)
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("failed to cast %q clonedPV %#v to PersistentVolume", name, pv)
|
||||
}
|
||||
|
||||
return volume.NewSpecFromPersistentVolume(clonedPV, pvcReadOnly), nil
|
||||
}
|
||||
|
||||
// ProcessPodVolumes processes the volumes in the given pod and adds them to the
|
||||
// desired state of the world if addVolumes is true, otherwise it removes them.
|
||||
func ProcessPodVolumes(pod *v1.Pod, addVolumes bool, desiredStateOfWorld cache.DesiredStateOfWorld, volumePluginMgr *volume.VolumePluginMgr, pvcLister corelisters.PersistentVolumeClaimLister, pvLister corelisters.PersistentVolumeLister) {
|
||||
if pod == nil {
|
||||
return
|
||||
}
|
||||
|
||||
if len(pod.Spec.Volumes) <= 0 {
|
||||
glog.V(10).Infof("Skipping processing of pod %q/%q: it has no volumes.",
|
||||
pod.Namespace,
|
||||
pod.Name)
|
||||
return
|
||||
}
|
||||
|
||||
nodeName := types.NodeName(pod.Spec.NodeName)
|
||||
if nodeName == "" {
|
||||
glog.V(10).Infof(
|
||||
"Skipping processing of pod %q/%q: it is not scheduled to a node.",
|
||||
pod.Namespace,
|
||||
pod.Name)
|
||||
return
|
||||
} else if !desiredStateOfWorld.NodeExists(nodeName) {
|
||||
// If the node the pod is scheduled to does not exist in the desired
|
||||
// state of the world data structure, that indicates the node is not
|
||||
// yet managed by the controller. Therefore, ignore the pod.
|
||||
glog.V(10).Infof(
|
||||
"Skipping processing of pod %q/%q: it is scheduled to node %q which is not managed by the controller.",
|
||||
pod.Namespace,
|
||||
pod.Name,
|
||||
nodeName)
|
||||
return
|
||||
}
|
||||
|
||||
// Process volume spec for each volume defined in pod
|
||||
for _, podVolume := range pod.Spec.Volumes {
|
||||
volumeSpec, err := CreateVolumeSpec(podVolume, pod.Namespace, pvcLister, pvLister)
|
||||
if err != nil {
|
||||
glog.V(10).Infof(
|
||||
"Error processing volume %q for pod %q/%q: %v",
|
||||
podVolume.Name,
|
||||
pod.Namespace,
|
||||
pod.Name,
|
||||
err)
|
||||
continue
|
||||
}
|
||||
|
||||
attachableVolumePlugin, err :=
|
||||
volumePluginMgr.FindAttachablePluginBySpec(volumeSpec)
|
||||
if err != nil || attachableVolumePlugin == nil {
|
||||
glog.V(10).Infof(
|
||||
"Skipping volume %q for pod %q/%q: it does not implement attacher interface. err=%v",
|
||||
podVolume.Name,
|
||||
pod.Namespace,
|
||||
pod.Name,
|
||||
err)
|
||||
continue
|
||||
}
|
||||
|
||||
uniquePodName := volumehelper.GetUniquePodName(pod)
|
||||
if addVolumes {
|
||||
// Add volume to desired state of world
|
||||
_, err := desiredStateOfWorld.AddPod(
|
||||
uniquePodName, pod, volumeSpec, nodeName)
|
||||
if err != nil {
|
||||
glog.V(10).Infof(
|
||||
"Failed to add volume %q for pod %q/%q to desiredStateOfWorld. %v",
|
||||
podVolume.Name,
|
||||
pod.Namespace,
|
||||
pod.Name,
|
||||
err)
|
||||
}
|
||||
|
||||
} else {
|
||||
// Remove volume from desired state of world
|
||||
uniqueVolumeName, err := volumehelper.GetUniqueVolumeNameFromSpec(
|
||||
attachableVolumePlugin, volumeSpec)
|
||||
if err != nil {
|
||||
glog.V(10).Infof(
|
||||
"Failed to delete volume %q for pod %q/%q from desiredStateOfWorld. GetUniqueVolumeNameFromSpec failed with %v",
|
||||
podVolume.Name,
|
||||
pod.Namespace,
|
||||
pod.Name,
|
||||
err)
|
||||
continue
|
||||
}
|
||||
desiredStateOfWorld.DeletePod(
|
||||
uniquePodName, uniqueVolumeName, nodeName)
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
@ -143,18 +143,7 @@ func (dswp *desiredStateOfWorldPopulator) isPodTerminated(pod *v1.Pod) bool {
|
||||
if !found {
|
||||
podStatus = pod.Status
|
||||
}
|
||||
return podStatus.Phase == v1.PodFailed || podStatus.Phase == v1.PodSucceeded || (pod.DeletionTimestamp != nil && notRunning(podStatus.ContainerStatuses))
|
||||
}
|
||||
|
||||
// notRunning returns true if every status is terminated or waiting, or the status list
|
||||
// is empty.
|
||||
func notRunning(statuses []v1.ContainerStatus) bool {
|
||||
for _, status := range statuses {
|
||||
if status.State.Terminated == nil && status.State.Waiting == nil {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
return volumehelper.IsPodTerminated(pod, podStatus)
|
||||
}
|
||||
|
||||
// Iterate through all pods and add to desired state of world if they don't
|
||||
|
||||
@ -87,3 +87,19 @@ func GetUniqueVolumeNameFromSpec(
|
||||
volumeName),
|
||||
nil
|
||||
}
|
||||
|
||||
// IsPodTerminated checks if pod is terminated
|
||||
func IsPodTerminated(pod *v1.Pod, podStatus v1.PodStatus) bool {
|
||||
return podStatus.Phase == v1.PodFailed || podStatus.Phase == v1.PodSucceeded || (pod.DeletionTimestamp != nil && notRunning(podStatus.ContainerStatuses))
|
||||
}
|
||||
|
||||
// notRunning returns true if every status is terminated or waiting, or the status list
|
||||
// is empty.
|
||||
func notRunning(statuses []v1.ContainerStatus) bool {
|
||||
for _, status := range statuses {
|
||||
if status.State.Terminated == nil && status.State.Waiting == nil {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
@ -222,3 +222,89 @@ func createAdClients(ns *v1.Namespace, t *testing.T, server *httptest.Server, sy
|
||||
}
|
||||
return testClient, ctrl, informers
|
||||
}
|
||||
|
||||
// Via integration test we can verify that if pod add
|
||||
// event is somehow missed by AttachDetach controller - it still
|
||||
// gets added by Desired State of World populator.
|
||||
func TestPodAddedByDswp(t *testing.T) {
|
||||
_, server := framework.RunAMaster(nil)
|
||||
defer server.Close()
|
||||
namespaceName := "test-pod-deletion"
|
||||
|
||||
node := &v1.Node{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "node-sandbox",
|
||||
Annotations: map[string]string{
|
||||
volumehelper.ControllerManagedAttachAnnotation: "true",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
ns := framework.CreateTestingNamespace(namespaceName, server, t)
|
||||
defer framework.DeleteTestingNamespace(ns, server, t)
|
||||
|
||||
testClient, ctrl, informers := createAdClients(ns, t, server, defaultSyncPeriod)
|
||||
|
||||
pod := fakePodWithVol(namespaceName)
|
||||
podStopCh := make(chan struct{})
|
||||
|
||||
if _, err := testClient.Core().Nodes().Create(node); err != nil {
|
||||
t.Fatalf("Failed to created node : %v", err)
|
||||
}
|
||||
|
||||
go informers.Core().V1().Nodes().Informer().Run(podStopCh)
|
||||
|
||||
if _, err := testClient.Core().Pods(ns.Name).Create(pod); err != nil {
|
||||
t.Errorf("Failed to create pod : %v", err)
|
||||
}
|
||||
|
||||
podInformer := informers.Core().V1().Pods().Informer()
|
||||
go podInformer.Run(podStopCh)
|
||||
|
||||
// start controller loop
|
||||
stopCh := make(chan struct{})
|
||||
go informers.Core().V1().PersistentVolumeClaims().Informer().Run(stopCh)
|
||||
go informers.Core().V1().PersistentVolumes().Informer().Run(stopCh)
|
||||
go ctrl.Run(stopCh)
|
||||
|
||||
waitToObservePods(t, podInformer, 1)
|
||||
podKey, err := cache.MetaNamespaceKeyFunc(pod)
|
||||
if err != nil {
|
||||
t.Fatalf("MetaNamespaceKeyFunc failed with : %v", err)
|
||||
}
|
||||
|
||||
_, _, err = podInformer.GetStore().GetByKey(podKey)
|
||||
|
||||
if err != nil {
|
||||
t.Fatalf("Pod not found in Pod Informer cache : %v", err)
|
||||
}
|
||||
|
||||
waitForPodsInDSWP(t, ctrl.GetDesiredStateOfWorld())
|
||||
|
||||
// let's stop pod events from getting triggered
|
||||
close(podStopCh)
|
||||
podObj, err := api.Scheme.DeepCopy(pod)
|
||||
if err != nil {
|
||||
t.Fatalf("Error copying pod : %v", err)
|
||||
}
|
||||
podNew, ok := podObj.(*v1.Pod)
|
||||
if !ok {
|
||||
t.Fatalf("Error converting pod : %v", err)
|
||||
}
|
||||
newPodName := "newFakepod"
|
||||
podNew.SetName(newPodName)
|
||||
err = podInformer.GetStore().Add(podNew)
|
||||
if err != nil {
|
||||
t.Fatalf("Error adding pod : %v", err)
|
||||
}
|
||||
|
||||
waitToObservePods(t, podInformer, 2)
|
||||
// the findAndAddActivePods loop turns every 3 minute
|
||||
time.Sleep(200 * time.Second)
|
||||
podsToAdd := ctrl.GetDesiredStateOfWorld().GetPodToAdd()
|
||||
if len(podsToAdd) != 2 {
|
||||
t.Fatalf("DSW should have two pods")
|
||||
}
|
||||
|
||||
close(stopCh)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user