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migration.go
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migration.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2017, 2018 Red Hat, Inc.
*
*/
package watch
import (
"fmt"
"reflect"
"time"
k8sv1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
virtv1 "kubevirt.io/kubevirt/pkg/api/v1"
"kubevirt.io/kubevirt/pkg/controller"
"kubevirt.io/kubevirt/pkg/kubecli"
"kubevirt.io/kubevirt/pkg/log"
"kubevirt.io/kubevirt/pkg/virt-controller/services"
)
type MigrationController struct {
templateService services.TemplateService
clientset kubecli.KubevirtClient
Queue workqueue.RateLimitingInterface
vmiInformer cache.SharedIndexInformer
podInformer cache.SharedIndexInformer
migrationInformer cache.SharedIndexInformer
recorder record.EventRecorder
podExpectations *controller.UIDTrackingControllerExpectations
}
func NewMigrationController(templateService services.TemplateService,
vmiInformer cache.SharedIndexInformer,
podInformer cache.SharedIndexInformer,
migrationInformer cache.SharedIndexInformer,
recorder record.EventRecorder,
clientset kubecli.KubevirtClient) *MigrationController {
c := &MigrationController{
templateService: templateService,
Queue: workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
vmiInformer: vmiInformer,
podInformer: podInformer,
migrationInformer: migrationInformer,
recorder: recorder,
clientset: clientset,
podExpectations: controller.NewUIDTrackingControllerExpectations(controller.NewControllerExpectations()),
}
c.vmiInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.addVMI,
DeleteFunc: c.deleteVMI,
UpdateFunc: c.updateVMI,
})
c.podInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.addPod,
DeleteFunc: c.deletePod,
UpdateFunc: c.updatePod,
})
c.migrationInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.addMigration,
DeleteFunc: c.deleteMigration,
UpdateFunc: c.updateMigration,
})
return c
}
func (c *MigrationController) Run(threadiness int, stopCh chan struct{}) {
defer controller.HandlePanic()
defer c.Queue.ShutDown()
log.Log.Info("Starting migration controller.")
// Wait for cache sync before we start the pod controller
cache.WaitForCacheSync(stopCh, c.vmiInformer.HasSynced, c.podInformer.HasSynced, c.migrationInformer.HasSynced)
// Start the actual work
for i := 0; i < threadiness; i++ {
go wait.Until(c.runWorker, time.Second, stopCh)
}
<-stopCh
log.Log.Info("Stopping migration controller.")
}
func (c *MigrationController) runWorker() {
for c.Execute() {
}
}
func (c *MigrationController) Execute() bool {
key, quit := c.Queue.Get()
if quit {
return false
}
defer c.Queue.Done(key)
err := c.execute(key.(string))
if err != nil {
log.Log.Reason(err).Infof("reenqueuing Migration %v", key)
c.Queue.AddRateLimited(key)
} else {
log.Log.V(4).Infof("processed Migration %v", key)
c.Queue.Forget(key)
}
return true
}
func (c *MigrationController) execute(key string) error {
var vmi *virtv1.VirtualMachineInstance
var targetPods []*k8sv1.Pod
// Fetch the latest state from cache
obj, exists, err := c.migrationInformer.GetStore().GetByKey(key)
if err != nil {
return err
}
if !exists {
c.podExpectations.DeleteExpectations(key)
return nil
}
migration := obj.(*virtv1.VirtualMachineInstanceMigration)
logger := log.Log.Object(migration)
vmiObj, vmiExists, err := c.vmiInformer.GetStore().GetByKey(fmt.Sprintf("%s/%s", migration.Namespace, migration.Spec.VMIName))
if err != nil {
return err
}
if !vmiExists {
if migration.DeletionTimestamp == nil {
logger.V(3).Infof("Deleting migration for deleted vmi %s/%s", migration.Namespace, migration.Spec.VMIName)
err := c.clientset.VirtualMachineInstanceMigration(migration.Namespace).Delete(migration.Name, &v1.DeleteOptions{})
if err != nil {
return err
}
}
// nothing to process for a migration that's being deleted
return nil
}
vmi = vmiObj.(*virtv1.VirtualMachineInstance)
targetPods, err = c.listMatchingTargetPods(migration, vmi)
if err != nil {
return err
}
needsSync := c.podExpectations.SatisfiedExpectations(key) && vmiExists
logger.V(4).Infof("processing migration: needsSync %t, hasVMI %t, targetPod len %d", needsSync, vmiExists, len(targetPods))
var syncErr error
if needsSync && !migration.IsFinal() {
syncErr = c.sync(migration, vmi, targetPods)
}
err = c.updateStatus(migration, vmi, targetPods, syncErr)
if err != nil {
return err
}
if syncErr != nil {
return syncErr
}
return nil
}
func (c *MigrationController) canMigrateVMI(migration *virtv1.VirtualMachineInstanceMigration, vmi *virtv1.VirtualMachineInstance) (bool, error) {
if vmi.Status.MigrationState == nil {
return true, nil
} else if vmi.Status.MigrationState.MigrationUID == migration.UID {
return true, nil
} else if vmi.Status.MigrationState.MigrationUID == "" {
return true, nil
}
curMigrationUID := vmi.Status.MigrationState.MigrationUID
// check to see if the curMigrationUID still exists or is finalized
objs, err := c.migrationInformer.GetIndexer().ByIndex(cache.NamespaceIndex, migration.Namespace)
if err != nil {
return false, err
}
for _, obj := range objs {
curMigration := obj.(*virtv1.VirtualMachineInstanceMigration)
if curMigration.UID != curMigrationUID {
continue
}
if curMigration.IsFinal() {
// If the other job already completed, it's okay to take over the migration.
return true, nil
}
return false, nil
}
return true, nil
}
func (c *MigrationController) updateStatus(migration *virtv1.VirtualMachineInstanceMigration, vmi *virtv1.VirtualMachineInstance, pods []*k8sv1.Pod, syncErr error) error {
var pod *k8sv1.Pod = nil
// Nothing to do here if the migration has already completed
if migration.IsFinal() {
return nil
}
podExists := len(pods) > 0
if podExists {
pod = pods[0]
}
migrationCopy := migration.DeepCopy()
// Status checking of active Migration job.
//
// 1. Fail if VMI isn't in running state.
// 2. Fail if target pod exists and has gone down for any reason.
// 3. Begin progressing migration state based on VMI's MigrationState status.
if vmi == nil {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "Migration failed because vmi does not exist.")
log.Log.Object(migration).Error("vmi does not exist")
} else if vmi.IsFinal() {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "Migration failed vmi shutdown during migration.")
log.Log.Object(migration).Error("Unable to migrate vmi because vmi is shutdown.")
} else if podExists && podIsDown(pod) {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "Migration failed because target pod shutdown during migration")
log.Log.Object(migration).Errorf("target pod %s/%s shutdown during migration", pod.Namespace, pod.Name)
} else if migration.TargetIsCreated() && !podExists {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "Migration target pod was removed during active migration.")
log.Log.Object(migration).Error("target pod disappeared during migration")
} else if migration.TargetIsHandedOff() && vmi.Status.MigrationState == nil {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "VMI's migration state was cleared during the active migration.")
log.Log.Object(migration).Error("vmi migration state cleared during migration")
} else if migration.TargetIsHandedOff() &&
vmi.Status.MigrationState != nil &&
vmi.Status.MigrationState.MigrationUID != migration.UID {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "VMI's migration state was taken over by another migration job during active migration.")
log.Log.Object(migration).Error("vmi's migration state was taken over by another migration object")
} else if vmi.Status.MigrationState != nil &&
vmi.Status.MigrationState.MigrationUID == migration.UID &&
vmi.Status.MigrationState.Failed {
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "Source node reported migration failed")
log.Log.Object(migration).Error("VMI reported migration failed.")
} else {
switch migration.Status.Phase {
case virtv1.MigrationPhaseUnset:
canMigrate, err := c.canMigrateVMI(migration, vmi)
if err != nil {
return err
}
if canMigrate {
migrationCopy.Status.Phase = virtv1.MigrationPending
} else {
// can not migrate because there is an active migration already
// in progress for this VMI.
migrationCopy.Status.Phase = virtv1.MigrationFailed
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedMigrationReason, "VMI is not eligible for migration because another migration job is in progress.")
log.Log.Object(migration).Error("Migration object ont eligible for migration because another job is in progress")
}
case virtv1.MigrationPending:
if podExists {
migrationCopy.Status.Phase = virtv1.MigrationScheduling
}
case virtv1.MigrationScheduling:
if isPodReady(pod) {
migrationCopy.Status.Phase = virtv1.MigrationScheduled
}
case virtv1.MigrationScheduled:
if vmi.Status.MigrationState != nil && vmi.Status.MigrationState.TargetNode != "" {
migrationCopy.Status.Phase = virtv1.MigrationPreparingTarget
}
case virtv1.MigrationPreparingTarget:
if vmi.Status.MigrationState.TargetNode != "" && vmi.Status.MigrationState.TargetNodeAddress != "" {
migrationCopy.Status.Phase = virtv1.MigrationTargetReady
}
case virtv1.MigrationTargetReady:
if vmi.Status.MigrationState.StartTimestamp != nil {
migrationCopy.Status.Phase = virtv1.MigrationRunning
}
case virtv1.MigrationRunning:
if vmi.Status.MigrationState.Completed {
migrationCopy.Status.Phase = virtv1.MigrationSucceeded
c.recorder.Eventf(migration, k8sv1.EventTypeNormal, SuccessfulMigrationReason, "Source node reported migration succeeded")
log.Log.Object(migration).Infof("VMI reported migration succeeded.")
}
}
}
if !reflect.DeepEqual(migration.Status, migrationCopy.Status) {
_, err := c.clientset.VirtualMachineInstanceMigration(migration.Namespace).Update(migrationCopy)
if err != nil {
return err
}
}
return nil
}
func (c *MigrationController) createTargetPod(migration *virtv1.VirtualMachineInstanceMigration, vmi *virtv1.VirtualMachineInstance) error {
templatePod, err := c.templateService.RenderLaunchManifest(vmi)
if err != nil {
return fmt.Errorf("failed to render launch manifest: %v", err)
}
antiAffinityTerm := k8sv1.PodAffinityTerm{
LabelSelector: &v1.LabelSelector{
MatchLabels: map[string]string{
virtv1.CreatedByLabel: string(vmi.UID),
},
},
TopologyKey: "kubernetes.io/hostname",
}
antiAffinityRule := &k8sv1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []k8sv1.PodAffinityTerm{antiAffinityTerm},
}
if templatePod.Spec.Affinity == nil {
templatePod.Spec.Affinity = &k8sv1.Affinity{
PodAntiAffinity: antiAffinityRule,
}
} else if templatePod.Spec.Affinity.PodAntiAffinity == nil {
templatePod.Spec.Affinity.PodAntiAffinity = antiAffinityRule
} else {
templatePod.Spec.Affinity.PodAntiAffinity.RequiredDuringSchedulingIgnoredDuringExecution = append(templatePod.Spec.Affinity.PodAntiAffinity.RequiredDuringSchedulingIgnoredDuringExecution, antiAffinityTerm)
}
templatePod.ObjectMeta.Labels[virtv1.MigrationJobLabel] = string(migration.UID)
templatePod.ObjectMeta.Annotations[virtv1.MigrationJobNameAnnotation] = string(migration.Name)
// TODO libvirt requires unique host names for each target and source
templatePod.Spec.Hostname = ""
key := controller.MigrationKey(migration)
c.podExpectations.ExpectCreations(key, 1)
pod, err := c.clientset.CoreV1().Pods(vmi.GetNamespace()).Create(templatePod)
if err != nil {
c.recorder.Eventf(vmi, k8sv1.EventTypeWarning, FailedCreatePodReason, "Error creating pod: %v", err)
c.podExpectations.CreationObserved(key)
return fmt.Errorf("failed to create vmi migration target pod: %v", err)
}
c.recorder.Eventf(migration, k8sv1.EventTypeNormal, SuccessfulCreatePodReason, "Created migration target pod %s", pod.Name)
return nil
}
func (c *MigrationController) sync(migration *virtv1.VirtualMachineInstanceMigration, vmi *virtv1.VirtualMachineInstance, pods []*k8sv1.Pod) error {
var pod *k8sv1.Pod = nil
podExists := len(pods) > 0
if podExists {
pod = pods[0]
}
if vmi == nil || vmi.DeletionTimestamp != nil {
// nothing to do with a deleted vmi
return nil
} else if vmi.Status.MigrationState != nil &&
vmi.Status.MigrationState.MigrationUID == migration.UID &&
vmi.Status.MigrationState.EndTimestamp != nil {
// nothing to do here, the migration is done
return nil
}
canMigrate, err := c.canMigrateVMI(migration, vmi)
if err != nil {
return err
}
if !canMigrate {
return fmt.Errorf("vmi is inelgible for migration because another migration job is running")
}
switch migration.Status.Phase {
case virtv1.MigrationPending:
// migration was accepted into the system, now see if we
// should create the target pod
if !podExists && vmi.IsRunning() {
return c.createTargetPod(migration, vmi)
}
return nil
case virtv1.MigrationScheduled:
// once target pod is scheduled, alert the VMI of the migration by
// setting the target and source nodes. This kicks off the preparation stage.
if podExists && !podIsDown(pod) {
vmiCopy := vmi.DeepCopy()
vmiCopy.Status.MigrationState = &virtv1.VirtualMachineInstanceMigrationState{
MigrationUID: migration.UID,
TargetNode: pod.Spec.NodeName,
SourceNode: vmi.Status.NodeName,
}
// By setting this label, virt-handler on the target node will receive
// the vmi and prepare the local environment for the migration
vmiCopy.ObjectMeta.Labels[virtv1.MigrationTargetNodeNameLabel] = pod.Spec.NodeName
if !reflect.DeepEqual(vmi.Status, vmiCopy.Status) ||
!reflect.DeepEqual(vmi.Labels, vmiCopy.Labels) {
_, err := c.clientset.VirtualMachineInstance(vmi.Namespace).Update(vmiCopy)
if err != nil {
c.recorder.Eventf(migration, k8sv1.EventTypeWarning, FailedHandOverPodReason, fmt.Sprintf("Failed to set MigrationStat in VMI status. :%v", err))
return err
}
c.recorder.Eventf(migration, k8sv1.EventTypeNormal, SuccessfulHandOverPodReason, "Migration target pod is ready for preparation by virt-handler.")
}
}
}
return nil
}
func (c *MigrationController) listMatchingTargetPods(migration *virtv1.VirtualMachineInstanceMigration, vmi *virtv1.VirtualMachineInstance) ([]*k8sv1.Pod, error) {
selector, err := v1.LabelSelectorAsSelector(&v1.LabelSelector{
MatchLabels: map[string]string{
virtv1.CreatedByLabel: string(vmi.UID),
virtv1.AppLabel: "virt-launcher",
virtv1.MigrationJobLabel: string(migration.UID),
},
})
objs, err := c.podInformer.GetIndexer().ByIndex(cache.NamespaceIndex, migration.Namespace)
if err != nil {
return nil, err
}
pods := []*k8sv1.Pod{}
for _, obj := range objs {
pod := obj.(*k8sv1.Pod)
if selector.Matches(labels.Set(pod.ObjectMeta.Labels)) {
pods = append(pods, pod)
}
}
return pods, nil
}
func (c *MigrationController) addMigration(obj interface{}) {
c.enqueueMigration(obj)
}
func (c *MigrationController) deleteMigration(obj interface{}) {
c.enqueueMigration(obj)
}
func (c *MigrationController) updateMigration(old, curr interface{}) {
c.enqueueMigration(curr)
}
func (c *MigrationController) enqueueMigration(obj interface{}) {
logger := log.Log
migration := obj.(*virtv1.VirtualMachineInstanceMigration)
key, err := controller.KeyFunc(migration)
if err != nil {
logger.Object(migration).Reason(err).Error("Failed to extract key from migration.")
}
c.Queue.Add(key)
}
func (c *MigrationController) getControllerOf(pod *k8sv1.Pod) *v1.OwnerReference {
t := true
return &v1.OwnerReference{
Kind: virtv1.VirtualMachineInstanceMigrationGroupVersionKind.Kind,
Name: pod.Annotations[virtv1.MigrationJobNameAnnotation],
UID: types.UID(pod.Labels[virtv1.MigrationJobLabel]),
Controller: &t,
BlockOwnerDeletion: &t,
}
}
// resolveControllerRef returns the controller referenced by a ControllerRef,
// or nil if the ControllerRef could not be resolved to a matching controller
// of the correct Kind.
func (c *MigrationController) resolveControllerRef(namespace string, controllerRef *v1.OwnerReference) *virtv1.VirtualMachineInstanceMigration {
// We can't look up by UID, so look up by Name and then verify UID.
// Don't even try to look up by Name if it's the wrong Kind.
if controllerRef.Kind != virtv1.VirtualMachineInstanceMigrationGroupVersionKind.Kind {
return nil
}
migration, exists, err := c.migrationInformer.GetStore().GetByKey(namespace + "/" + controllerRef.Name)
if err != nil {
return nil
}
if !exists {
return nil
}
if migration.(*virtv1.VirtualMachineInstanceMigration).UID != controllerRef.UID {
// The controller we found with this Name is not the same one that the
// ControllerRef points to.
return nil
}
return migration.(*virtv1.VirtualMachineInstanceMigration)
}
// When a pod is created, enqueue the migration that manages it and update its podExpectations.
func (c *MigrationController) addPod(obj interface{}) {
pod := obj.(*k8sv1.Pod)
if pod.DeletionTimestamp != nil {
// on a restart of the controller manager, it's possible a new pod shows up in a state that
// is already pending deletion. Prevent the pod from being a creation observation.
c.deletePod(pod)
return
}
controllerRef := c.getControllerOf(pod)
migration := c.resolveControllerRef(pod.Namespace, controllerRef)
if migration == nil {
return
}
migrationKey, err := controller.KeyFunc(migration)
if err != nil {
return
}
log.Log.V(4).Object(pod).Infof("Pod created")
c.podExpectations.CreationObserved(migrationKey)
c.enqueueMigration(migration)
}
// When a pod is updated, figure out what migration manages it and wake them
// up. If the labels of the pod have changed we need to awaken both the old
// and new migration. old and cur must be *v1.Pod types.
func (c *MigrationController) updatePod(old, cur interface{}) {
curPod := cur.(*k8sv1.Pod)
oldPod := old.(*k8sv1.Pod)
if curPod.ResourceVersion == oldPod.ResourceVersion {
// Periodic resync will send update events for all known pods.
// Two different versions of the same pod will always have different RVs.
return
}
labelChanged := !reflect.DeepEqual(curPod.Labels, oldPod.Labels)
if curPod.DeletionTimestamp != nil {
// having a pod marked for deletion is enough to count as a deletion expectation
c.deletePod(curPod)
if labelChanged {
// we don't need to check the oldPod.DeletionTimestamp because DeletionTimestamp cannot be unset.
c.deletePod(oldPod)
}
return
}
curControllerRef := c.getControllerOf(curPod)
oldControllerRef := c.getControllerOf(oldPod)
controllerRefChanged := !reflect.DeepEqual(curControllerRef, oldControllerRef)
if controllerRefChanged && oldControllerRef != nil {
// The ControllerRef was changed. Sync the old controller, if any.
if migration := c.resolveControllerRef(oldPod.Namespace, oldControllerRef); migration != nil {
c.enqueueMigration(migration)
}
}
migration := c.resolveControllerRef(curPod.Namespace, curControllerRef)
if migration == nil {
return
}
log.Log.V(4).Object(curPod).Infof("Pod updated")
c.enqueueMigration(migration)
return
}
// When a pod is deleted, enqueue the migration that manages the pod and update its podExpectations.
// obj could be an *v1.Pod, or a DeletionFinalStateUnknown marker item.
func (c *MigrationController) deletePod(obj interface{}) {
pod, ok := obj.(*k8sv1.Pod)
// When a delete is dropped, the relist will notice a pod in the store not
// in the list, leading to the insertion of a tombstone object which contains
// the deleted key/value. Note that this value might be stale. If the pod
// changed labels the new migration will not be woken up till the periodic resync.
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
log.Log.Reason(fmt.Errorf("couldn't get object from tombstone %+v", obj)).Error("Failed to process delete notification")
return
}
pod, ok = tombstone.Obj.(*k8sv1.Pod)
if !ok {
log.Log.Reason(fmt.Errorf("tombstone contained object that is not a pod %#v", obj)).Error("Failed to process delete notification")
return
}
}
controllerRef := c.getControllerOf(pod)
migration := c.resolveControllerRef(pod.Namespace, controllerRef)
if migration == nil {
return
}
migrationKey, err := controller.KeyFunc(migration)
if err != nil {
return
}
c.podExpectations.DeletionObserved(migrationKey, controller.PodKey(pod))
c.enqueueMigration(migration)
}
// takes a namespace and returns all migrations listening for this vmi
func (c *MigrationController) listMigrationsMatchingVMI(namespace string, name string) ([]*virtv1.VirtualMachineInstanceMigration, error) {
objs, err := c.migrationInformer.GetIndexer().ByIndex(cache.NamespaceIndex, namespace)
if err != nil {
return nil, err
}
migrations := []*virtv1.VirtualMachineInstanceMigration{}
for _, obj := range objs {
migration := obj.(*virtv1.VirtualMachineInstanceMigration)
if migration.Spec.VMIName == name {
migrations = append(migrations, migration)
}
}
return migrations, nil
}
func (c *MigrationController) addVMI(obj interface{}) {
vmi := obj.(*virtv1.VirtualMachineInstance)
if vmi.DeletionTimestamp != nil {
c.deleteVMI(vmi)
return
}
migrations, err := c.listMigrationsMatchingVMI(vmi.Namespace, vmi.Name)
if err != nil {
return
}
for _, migration := range migrations {
c.enqueueMigration(migration)
}
}
func (c *MigrationController) updateVMI(old, cur interface{}) {
curVMI := cur.(*virtv1.VirtualMachineInstance)
oldVMI := old.(*virtv1.VirtualMachineInstance)
if curVMI.ResourceVersion == oldVMI.ResourceVersion {
// Periodic resync will send update events for all known VMIs.
// Two different versions of the same vmi will always
// have different RVs.
return
}
labelChanged := !reflect.DeepEqual(curVMI.Labels, oldVMI.Labels)
if curVMI.DeletionTimestamp != nil {
// having a DataVOlume marked for deletion is enough
// to count as a deletion expectation
c.deleteVMI(curVMI)
if labelChanged {
// we don't need to check the oldVMI.DeletionTimestamp
// because DeletionTimestamp cannot be unset.
c.deleteVMI(oldVMI)
}
return
}
migrations, err := c.listMigrationsMatchingVMI(curVMI.Namespace, curVMI.Name)
if err != nil {
log.Log.V(4).Object(curVMI).Errorf("Error encountered during datavolume update: %v", err)
return
}
for _, migration := range migrations {
log.Log.V(4).Object(curVMI).Infof("vmi updated for migration %s", migration.Name)
c.enqueueMigration(migration)
}
}
func (c *MigrationController) deleteVMI(obj interface{}) {
vmi, ok := obj.(*virtv1.VirtualMachineInstance)
// When a delete is dropped, the relist will notice a vmi in the store not
// in the list, leading to the insertion of a tombstone object which contains
// the deleted key/value. Note that this value might be stale. If the vmi
// changed labels the new vmi will not be woken up till the periodic resync.
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
log.Log.Reason(fmt.Errorf("couldn't get object from tombstone %+v", obj)).Error("Failed to process delete notification")
return
}
vmi, ok = tombstone.Obj.(*virtv1.VirtualMachineInstance)
if !ok {
log.Log.Reason(fmt.Errorf("tombstone contained object that is not a vmi %#v", obj)).Error("Failed to process delete notification")
return
}
}
migrations, err := c.listMigrationsMatchingVMI(vmi.Namespace, vmi.Name)
if err != nil {
return
}
for _, migration := range migrations {
log.Log.V(4).Object(vmi).Infof("vmi deleted for migration %s", migration.Name)
c.enqueueMigration(migration)
}
}