alexlebens/external-snapshotter
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Add a check to see if PVC has a finalizer

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This commit is contained in:
xing-yang
2020-04-02 02:01:52 +00:00
parent 8ae4d0c278
commit c82c8e0c7e
1 changed files with 13 additions and 6 deletions
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19
pkg/common-controller/snapshot_controller.go
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@@ -167,9 +167,10 @@ func (ctrl *csiSnapshotCommonController) syncSnapshot(snapshot *crdv1.VolumeSnap
}
// Proceed with snapshot deletion only if snapshot is not in the middled of being
// created from a PVC. This is to ensure that the PVC finalizer can be removed even
// if a delete snapshot request is received before create snapshot has completed.
if snapshot.ObjectMeta.DeletionTimestamp != nil && !ctrl.isPVCInUseByCurrentSnapshot(snapshot) {
// created from a PVC with a finalizer. This is to ensure that the PVC finalizer
// can be removed even if a delete snapshot request is received before create
// snapshot has completed.
if snapshot.ObjectMeta.DeletionTimestamp != nil && !ctrl.isPVCwithFinalizerInUseByCurrentSnapshot(snapshot) {
err := ctrl.processSnapshotWithDeletionTimestamp(snapshot)
if err != nil {
return err
@@ -193,15 +194,21 @@ func (ctrl *csiSnapshotCommonController) syncSnapshot(snapshot *crdv1.VolumeSnap
return nil
}
// Check if PVC is being used by the current snapshot as source
func (ctrl *csiSnapshotCommonController) isPVCInUseByCurrentSnapshot(snapshot *crdv1.VolumeSnapshot) bool {
// Check if PVC has a finalizer and if it is being used by the current snapshot as source.
func (ctrl *csiSnapshotCommonController) isPVCwithFinalizerInUseByCurrentSnapshot(snapshot *crdv1.VolumeSnapshot) bool {
// Get snapshot source which is a PVC
pvc, err := ctrl.getClaimFromVolumeSnapshot(snapshot)
if err != nil {
klog.Infof("cannot get claim from snapshot [%s]: [%v] Claim may be deleted already.", snapshot.Name, err)
return false
}
if snapshot.Spec.Source.PersistentVolumeClaimName != nil && pvc.Name == *snapshot.Spec.Source.PersistentVolumeClaimName && !utils.IsSnapshotReady(snapshot) {
// Check if there is a Finalizer on PVC. If not, return false
if !slice.ContainsString(pvc.ObjectMeta.Finalizers, utils.PVCFinalizer, nil) {
return false
}
if !utils.IsSnapshotReady(snapshot) {
klog.V(2).Infof("PVC %s/%s is being used by snapshot %s/%s as source", pvc.Namespace, pvc.Name, snapshot.Namespace, snapshot.Name)
return true
}