fix issue 6614

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/controller/data_download_controller.go

@@ -255,7 +255,7 @@ func (r *DataDownloadReconciler) Reconcile(ctx context.Context, req ctrl.Request
 }
 
 func (r *DataDownloadReconciler) runCancelableDataPath(ctx context.Context, fsRestore datapath.AsyncBR, dd *velerov2alpha1api.DataDownload, res *exposer.ExposeResult, log logrus.FieldLogger) (reconcile.Result, error) {
-	path, err := exposer.GetPodVolumeHostPath(ctx, res.ByPod.HostingPod, res.ByPod.PVC, r.client, r.fileSystem, log)
+	path, err := exposer.GetPodVolumeHostPath(ctx, res.ByPod.HostingPod, res.ByPod.VolumeName, r.client, r.fileSystem, log)
 	if err != nil {
 		return r.errorOut(ctx, dd, err, "error exposing host path for pod volume", log)
 	}

pkg/controller/data_download_controller_test.go

@@ -343,7 +343,7 @@ func TestDataDownloadReconcile(t *testing.T) {
 						} else if test.notNilExpose {
 							hostingPod := builder.ForPod("test-ns", "test-name").Volumes(&corev1.Volume{Name: "test-pvc"}).Result()
 							hostingPod.ObjectMeta.SetUID("test-uid")
-							ep.On("GetExposed", mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(&exposer.ExposeResult{ByPod: exposer.ExposeByPod{HostingPod: hostingPod, PVC: "test-pvc"}}, nil)
+							ep.On("GetExposed", mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(&exposer.ExposeResult{ByPod: exposer.ExposeByPod{HostingPod: hostingPod, VolumeName: "test-pvc"}}, nil)
 						} else if test.isGetExposeErr {
 							ep.On("GetExposed", mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(nil, errors.New("Error to get restore exposer"))
 						}

pkg/controller/data_upload_controller.go

@@ -250,7 +250,7 @@ func (r *DataUploadReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 
 func (r *DataUploadReconciler) runCancelableDataUpload(ctx context.Context, fsBackup datapath.AsyncBR, du *velerov2alpha1api.DataUpload, res *exposer.ExposeResult, log logrus.FieldLogger) (reconcile.Result, error) {
 	log.Info("Run cancelable dataUpload")
-	path, err := exposer.GetPodVolumeHostPath(ctx, res.ByPod.HostingPod, res.ByPod.PVC, r.client, r.fileSystem, log)
+	path, err := exposer.GetPodVolumeHostPath(ctx, res.ByPod.HostingPod, res.ByPod.VolumeName, r.client, r.fileSystem, log)
 	if err != nil {
 		return r.errorOut(ctx, du, err, "error exposing host path for pod volume", log)
 	}

pkg/controller/data_upload_controller_test.go

@@ -253,7 +253,7 @@ func (f *fakeSnapshotExposer) GetExposed(ctx context.Context, du corev1.ObjectRe
 	if err != nil {
 		return nil, err
 	}
-	return &exposer.ExposeResult{ByPod: exposer.ExposeByPod{HostingPod: pod, PVC: dataUploadName}}, nil
+	return &exposer.ExposeResult{ByPod: exposer.ExposeByPod{HostingPod: pod, VolumeName: dataUploadName}}, nil
 }
 
 func (f *fakeSnapshotExposer) CleanUp(context.Context, corev1.ObjectReference, string, string) {

pkg/exposer/csi_snapshot.go

@@ -218,7 +218,7 @@ func (e *csiSnapshotExposer) GetExposed(ctx context.Context, ownerObject corev1.
 
 	curLog.WithField("backup pvc", backupPVCName).Info("Backup PVC is bound")
 
-	return &ExposeResult{ByPod: ExposeByPod{HostingPod: pod, PVC: backupPVCName}}, nil
+	return &ExposeResult{ByPod: ExposeByPod{HostingPod: pod, VolumeName: pod.Spec.Volumes[0].Name}}, nil
 }
 
 func (e *csiSnapshotExposer) CleanUp(ctx context.Context, ownerObject corev1.ObjectReference, vsName string, sourceNamespace string) {
@@ -345,6 +345,9 @@ func (e *csiSnapshotExposer) createBackupPVC(ctx context.Context, ownerObject co
 func (e *csiSnapshotExposer) createBackupPod(ctx context.Context, ownerObject corev1.ObjectReference, backupPVC *corev1.PersistentVolumeClaim, label map[string]string) (*corev1.Pod, error) {
 	podName := ownerObject.Name
 
+	volumeName := string(ownerObject.UID)
+	containerName := string(ownerObject.UID)
+
 	podInfo, err := getInheritedPodInfo(ctx, e.kubeClient, ownerObject.Namespace)
 	if err != nil {
 		return nil, errors.Wrap(err, "error to get inherited pod info from node-agent")
@@ -370,20 +373,20 @@ func (e *csiSnapshotExposer) createBackupPod(ctx context.Context, ownerObject co
 		Spec: corev1.PodSpec{
 			Containers: []corev1.Container{
 				{
-					Name:            podName,
+					Name:            containerName,
 					Image:           podInfo.image,
 					ImagePullPolicy: corev1.PullNever,
 					Command:         []string{"/velero-helper", "pause"},
 					VolumeMounts: []corev1.VolumeMount{{
-						Name:      backupPVC.Name,
-						MountPath: "/" + backupPVC.Name,
+						Name:      volumeName,
+						MountPath: "/" + volumeName,
 					}},
 				},
 			},
 			ServiceAccountName:            podInfo.serviceAccount,
 			TerminationGracePeriodSeconds: &gracePeriod,
 			Volumes: []corev1.Volume{{
-				Name: backupPVC.Name,
+				Name: volumeName,
 				VolumeSource: corev1.VolumeSource{
 					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
 						ClaimName: backupPVC.Name,

pkg/exposer/generic_restore.go

@@ -143,7 +143,7 @@ func (e *genericRestoreExposer) GetExposed(ctx context.Context, ownerObject core
 
 	curLog.WithField("restore pvc", restorePVCName).Info("Restore PVC is bound")
 
-	return &ExposeResult{ByPod: ExposeByPod{HostingPod: pod, PVC: restorePVCName}}, nil
+	return &ExposeResult{ByPod: ExposeByPod{HostingPod: pod, VolumeName: pod.Spec.Volumes[0].Name}}, nil
 }
 
 func (e *genericRestoreExposer) CleanUp(ctx context.Context, ownerObject corev1.ObjectReference) {
@@ -251,6 +251,9 @@ func (e *genericRestoreExposer) createRestorePod(ctx context.Context, ownerObjec
 	restorePodName := ownerObject.Name
 	restorePVCName := ownerObject.Name
 
+	volumeName := string(ownerObject.UID)
+	containerName := string(ownerObject.UID)
+
 	podInfo, err := getInheritedPodInfo(ctx, e.kubeClient, ownerObject.Namespace)
 	if err != nil {
 		return nil, errors.Wrap(err, "error to get inherited pod info from node-agent")
@@ -276,20 +279,20 @@ func (e *genericRestoreExposer) createRestorePod(ctx context.Context, ownerObjec
 		Spec: corev1.PodSpec{
 			Containers: []corev1.Container{
 				{
-					Name:            restorePodName,
+					Name:            containerName,
 					Image:           podInfo.image,
 					ImagePullPolicy: corev1.PullNever,
 					Command:         []string{"/velero-helper", "pause"},
 					VolumeMounts: []corev1.VolumeMount{{
-						Name:      restorePVCName,
-						MountPath: "/" + restorePVCName,
+						Name:      volumeName,
+						MountPath: "/" + volumeName,
 					}},
 				},
 			},
 			ServiceAccountName:            podInfo.serviceAccount,
 			TerminationGracePeriodSeconds: &gracePeriod,
 			Volumes: []corev1.Volume{{
-				Name: restorePVCName,
+				Name: volumeName,
 				VolumeSource: corev1.VolumeSource{
 					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
 						ClaimName: restorePVCName,

pkg/exposer/host_path.go

@@ -34,23 +34,23 @@ var getVolumeDirectory = kube.GetVolumeDirectory
 var singlePathMatch = kube.SinglePathMatch
 
 // GetPodVolumeHostPath returns a path that can be accessed from the host for a given volume of a pod
-func GetPodVolumeHostPath(ctx context.Context, pod *corev1.Pod, pvcName string,
+func GetPodVolumeHostPath(ctx context.Context, pod *corev1.Pod, volumeName string,
 	cli ctrlclient.Client, fs filesystem.Interface, log logrus.FieldLogger) (datapath.AccessPoint, error) {
-	logger := log.WithField("pod name", pod.Name).WithField("pod UID", pod.GetUID()).WithField("pvc", pvcName)
+	logger := log.WithField("pod name", pod.Name).WithField("pod UID", pod.GetUID()).WithField("volume", volumeName)
 
-	volDir, err := getVolumeDirectory(ctx, logger, pod, pvcName, cli)
+	volDir, err := getVolumeDirectory(ctx, logger, pod, volumeName, cli)
 	if err != nil {
-		return datapath.AccessPoint{}, errors.Wrapf(err, "error getting volume directory name for pvc %s in pod %s", pvcName, pod.Name)
+		return datapath.AccessPoint{}, errors.Wrapf(err, "error getting volume directory name for volume %s in pod %s", volumeName, pod.Name)
 	}
 
-	logger.WithField("volDir", volDir).Info("Got volume for backup PVC")
+	logger.WithField("volDir", volDir).Info("Got volume dir")
 
 	pathGlob := fmt.Sprintf("/host_pods/%s/volumes/*/%s", string(pod.GetUID()), volDir)
 	logger.WithField("pathGlob", pathGlob).Debug("Looking for path matching glob")
 
 	path, err := singlePathMatch(pathGlob, fs, logger)
 	if err != nil {
-		return datapath.AccessPoint{}, errors.Wrapf(err, "error identifying unique volume path on host for pvc %s in pod %s", pvcName, pod.Name)
+		return datapath.AccessPoint{}, errors.Wrapf(err, "error identifying unique volume path on host for volume %s in pod %s", volumeName, pod.Name)
 	}
 
 	logger.WithField("path", path).Info("Found path matching glob")

pkg/exposer/host_path_test.go

@@ -48,7 +48,7 @@ func TestGetPodVolumeHostPath(t *testing.T) {
 			},
 			pod: builder.ForPod(velerov1api.DefaultNamespace, "fake-pod-1").Result(),
 			pvc: "fake-pvc-1",
-			err: "error getting volume directory name for pvc fake-pvc-1 in pod fake-pod-1: fake-error-1",
+			err: "error getting volume directory name for volume fake-pvc-1 in pod fake-pod-1: fake-error-1",
 		},
 		{
 			name: "single path match fail",
@@ -60,7 +60,7 @@ func TestGetPodVolumeHostPath(t *testing.T) {
 			},
 			pod: builder.ForPod(velerov1api.DefaultNamespace, "fake-pod-2").Result(),
 			pvc: "fake-pvc-1",
-			err: "error identifying unique volume path on host for pvc fake-pvc-1 in pod fake-pod-2: fake-error-2",
+			err: "error identifying unique volume path on host for volume fake-pvc-1 in pod fake-pod-2: fake-error-2",
 		},
 	}
 

pkg/exposer/types.go

@@ -33,5 +33,5 @@ type ExposeResult struct {
 // ExposeByPod defines the result for the expose method that a hosting pod is created
 type ExposeByPod struct {
 	HostingPod *corev1.Pod
-	PVC        string
+	VolumeName string
 }