feat: add useTarCommandInSnapshot flag in chart config

charts/latest/csi-driver-nfs/templates/csi-nfs-controller.yaml

@@ -181,6 +181,7 @@ spec:
             - "--mount-permissions={{ .Values.driver.mountPermissions }}"
             - "--working-mount-dir={{ .Values.controller.workingMountDir }}"
             - "--default-ondelete-policy={{ .Values.controller.defaultOnDeletePolicy }}"
+            - "--use-tar-command-in-snapshot={{ .Values.controller.useTarCommandInSnapshot }}"
           env:
             - name: NODE_ID
               valueFrom:

charts/latest/csi-driver-nfs/values.yaml

@@ -57,6 +57,7 @@ controller:
   runOnMaster: false
   runOnControlPlane: false
   enableSnapshotter: true
+  useTarCommandInSnapshot: false
   livenessProbe:
     healthPort: 29652
   logLevel: 5

cmd/nfsplugin/main.go

@@ -34,6 +34,7 @@ var (
 	defaultOnDeletePolicy        = flag.String("default-ondelete-policy", "", "default policy for deleting subdirectory when deleting a volume")
 	volStatsCacheExpireInMinutes = flag.Int("vol-stats-cache-expire-in-minutes", 10, "The cache expire time in minutes for volume stats cache")
 	removeArchivedVolumePath     = flag.Bool("remove-archived-volume-path", false, "remove archived volume path in DeleteVolume")
+	useTarCommandInSnapshot      = flag.Bool("use-tar-command-in-snapshot", false, "use tar command to pack and unpack snapshot data")
 )
 
 func main() {
@@ -58,6 +59,7 @@ func handle() {
 		DefaultOnDeletePolicy:        *defaultOnDeletePolicy,
 		VolStatsCacheExpireInMinutes: *volStatsCacheExpireInMinutes,
 		RemoveArchivedVolumePath:     *removeArchivedVolumePath,
+		UseTarCommandInSnapshot:      *useTarCommandInSnapshot,
 	}
 	d := nfs.NewDriver(&driverOptions)
 	d.Run(false)

pkg/nfs/controllerserver.go

@@ -406,9 +406,14 @@ func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
 	dstPath := filepath.Join(snapInternalVolPath, snapshot.archiveName())
 
 	klog.V(2).Infof("tar %v -> %v", srcPath, dstPath)
-	err = TarPack(srcPath, dstPath, true)
+	if cs.Driver.useTarCommandInSnapshot {
-	if err != nil {
+		if out, err := exec.Command("tar", "-C", srcPath, "-czvf", dstPath, ".").CombinedOutput(); err != nil {
-		return nil, status.Errorf(codes.Internal, "failed to create archive for snapshot: %v", err)
+			return nil, status.Errorf(codes.Internal, "failed to create archive for snapshot: %v: %v", err, string(out))
+		}
+	} else {
+		if err := TarPack(srcPath, dstPath, true); err != nil {
+			return nil, status.Errorf(codes.Internal, "failed to create archive for snapshot: %v", err)
+		}
 	}
 	klog.V(2).Infof("tar %s -> %s complete", srcPath, dstPath)
 
@@ -573,9 +578,14 @@ func (cs *ControllerServer) copyFromSnapshot(ctx context.Context, req *csi.Creat
 	dstPath := getInternalVolumePath(cs.Driver.workingMountDir, dstVol)
 	klog.V(2).Infof("copy volume from snapshot %v -> %v", snapPath, dstPath)
 
-	err = TarUnpack(snapPath, dstPath, true)
+	if cs.Driver.useTarCommandInSnapshot {
-	if err != nil {
+		if out, err := exec.Command("tar", "-xzvf", snapPath, "-C", dstPath).CombinedOutput(); err != nil {
-		return status.Errorf(codes.Internal, "failed to copy volume for snapshot: %v", err)
+			return status.Errorf(codes.Internal, "failed to copy volume for snapshot: %v: %v", err, string(out))
+		}
+	} else {
+		if err := TarUnpack(snapPath, dstPath, true); err != nil {
+			return status.Errorf(codes.Internal, "failed to copy volume for snapshot: %v", err)
+		}
 	}
 	klog.V(2).Infof("volume copied from snapshot %v -> %v", snapPath, dstPath)
 	return nil

pkg/nfs/nfs.go

@@ -38,6 +38,7 @@ type DriverOptions struct {
 	DefaultOnDeletePolicy        string
 	VolStatsCacheExpireInMinutes int
 	RemoveArchivedVolumePath     bool
+	UseTarCommandInSnapshot      bool
 }
 
 type Driver struct {
@@ -49,6 +50,7 @@ type Driver struct {
 	workingMountDir          string
 	defaultOnDeletePolicy    string
 	removeArchivedVolumePath bool
+	useTarCommandInSnapshot  bool
 
 	//ids *identityServer
 	ns          *NodeServer
@@ -96,6 +98,7 @@ func NewDriver(options *DriverOptions) *Driver {
 		workingMountDir:              options.WorkingMountDir,
 		volStatsCacheExpireInMinutes: options.VolStatsCacheExpireInMinutes,
 		removeArchivedVolumePath:     options.RemoveArchivedVolumePath,
+		useTarCommandInSnapshot:      options.UseTarCommandInSnapshot,
 	}
 
 	n.AddControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{