fix: only copy volume to different account if storageAccount is specified

Author: andyzhangx

pkg/blob/controllerserver.go

@@ -440,7 +440,7 @@ func (d *Driver) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest)
 		if err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to getAzcopyAuth on account(%s) rg(%s), error: %v", accountOptions.Name, accountOptions.ResourceGroup, err)
 		}
-		if err := d.copyVolume(req, accountSASToken, authAzcopyEnv, accountName, validContainerName, storageEndpointSuffix); err != nil {
+		if err := d.copyVolume(req, accountSASToken, authAzcopyEnv, account, validContainerName, storageEndpointSuffix); err != nil {
 			return nil, err
 		}
 	} else {
@@ -755,7 +755,7 @@ func (d *Driver) DeleteBlobContainer(ctx context.Context, subsID, resourceGroupN
 	})
 }
 
-// CopyBlobContainer copies a blob container
+// CopyBlobContainer copies a blob container, if dstAccountName is empty, then copy in the same account
 func (d *Driver) copyBlobContainer(req *csi.CreateVolumeRequest, accountSasToken string, authAzcopyEnv []string, dstAccountName, dstContainerName, storageEndpointSuffix string) error {
 	var sourceVolumeID string
 	if req.GetVolumeContentSource() != nil && req.GetVolumeContentSource().GetVolume() != nil {