*: adjust volume tagging (#5526)

Signed-off-by: BornChanger <dawn_catcher@126.com>
Co-authored-by: BornChanger <dawn_catcher@126.com>

pkg/backup/snapshotter/snapshotter_aws.go

@@ -18,7 +18,6 @@ import (
 	"fmt"
 	"regexp"
 
-	"github.com/pingcap/tidb-operator/pkg/apis/label"
 	"github.com/pingcap/tidb-operator/pkg/apis/pingcap/v1alpha1"
 	"github.com/pingcap/tidb-operator/pkg/backup/constants"
 	"github.com/pingcap/tidb-operator/pkg/backup/util"
@@ -29,8 +28,8 @@ import (
 const (
 	CloudAPIConcurrency = 8
 	PVCTagKey           = "CSIVolumeName"
-	PodTagKey           = "kubernetes.io/created-for/pvc/name"
-	PodNSTagKey         = "kubernetes.io/created-for/pvc/namespace"
+	PvcNameTagKey       = "kubernetes.io/created-for/pvc/name"
+	PvcNSTagKey         = "kubernetes.io/created-for/pvc/namespace"
 )
 
 // AWSSnapshotter is the snapshotter for creating snapshots from volumes (during a backup)
@@ -105,8 +104,10 @@ func (s *AWSSnapshotter) AddVolumeTags(pvs []*corev1.PersistentVolume) error {
 	for _, pv := range pvs {
 		tags := make(map[string]string)
 		tags[PVCTagKey] = pv.GetName()
-		tags[PodTagKey] = pv.GetAnnotations()[label.AnnPodNameKey]
-		tags[PodNSTagKey] = pv.GetLabels()[label.NamespaceLabelKey]
+		if pv.Spec.ClaimRef != nil {
+			tags[PvcNameTagKey] = pv.Spec.ClaimRef.Name
+			tags[PvcNSTagKey] = pv.Spec.ClaimRef.Namespace
+		}
 
 		resourcesTags[pv.GetAnnotations()[constants.AnnRestoredVolumeID]] = tags
 	}