feature annotation for snapshotclass provisioner

Signed-off-by: Ning Ding <834652870@qq.com>

Author: big-appled

internal/util/labels_annotations.go

@@ -26,6 +26,10 @@ const (
 	CSIVSCDeletionPolicy             = "velero.io/csi-vsc-deletion-policy"
 	VolumeSnapshotClassSelectorLabel = "velero.io/csi-volumesnapshot-class"
 
+	// For some csi providers, the provisioner name of storageclass is no the same as driver name in snapshotclass
+	// We provide this annotation in snapshotclass to let velero detect the different name
+	VolumeSnapshotClassProvisionerAnnotation = "velero.io/csi-volumesnapshot-class-provisioner"
+
 	// There is no release w/ these constants exported. Using the strings for now.
 	// CSI Labels volumesnapshotclass
 	// https://github.com/kubernetes-csi/external-snapshotter/blob/master/pkg/utils/util.go#L59-L60

internal/util/util.go

@@ -132,10 +132,18 @@ func GetVolumeSnapshotClassForStorageClass(provisioner string, snapshotClient sn
 	// https://github.com/kubernetes-csi/external-snapshotter/blob/release-4.2/client/config/crd/snapshot.storage.k8s.io_volumesnapshotclasses.yaml
 	for _, sc := range snapshotClasses.Items {
 		_, hasLabelSelector := sc.Labels[VolumeSnapshotClassSelectorLabel]
-		if sc.Driver == provisioner && hasLabelSelector {
-			return &sc, nil
+		if hasLabelSelector {
+			if sc.Driver == provisioner {
+				return &sc, nil
+			} else { // check snapshotclass provisioner annotation exists
+				annotationValue, hasAnnotationsSelector := GetAnnotation(&sc.ObjectMeta, VolumeSnapshotClassProvisionerAnnotation)
+				if hasAnnotationsSelector && annotationValue == provisioner {
+					return &sc, nil
+				}
+			}
 		}
 	}
+
 	return nil, errors.Errorf("failed to get volumesnapshotclass for provisioner %s, ensure that the desired volumesnapshot class has the %s label", provisioner, VolumeSnapshotClassSelectorLabel)
 }
 
@@ -244,6 +252,15 @@ func IsVolumeSnapshotHasVSCDeleteSecret(vs *snapshotv1api.VolumeSnapshot) bool {
 	return nameExists && nsExists
 }
 
+// GetAnnotation get the annotations on the object
+func GetAnnotation(o *metav1.ObjectMeta, key string) (string, bool) {
+	if o.Annotations == nil {
+		return "", false
+	}
+	v, exist := o.Annotations[key]
+	return v, exist
+}
+
 // AddAnnotations adds the supplied key-values to the annotations on the object
 func AddAnnotations(o *metav1.ObjectMeta, vals map[string]string) {
 	if o.Annotations == nil {