+`cicustom`: `[meta=<volume>] [,network=<volume>] [,user=<volume>] [,vendor=<volume>]` ::
+
+Specify custom files to replace the automatically generated ones at start.
+
+`meta`=`<volume>` ;;
+
+Specify a custom file containing all meta data passed to the VM via"
+ ." cloud-init. This is provider specific meaning configdrive2 and nocloud differ.
+
+`network`=`<volume>` ;;
+
+To pass a custom file containing all network data to the VM via cloud-init.
+
+`user`=`<volume>` ;;
+
+To pass a custom file containing all user data to the VM via cloud-init.
+
+`vendor`=`<volume>` ;;
+
+To pass a custom file containing all vendor data to the VM via cloud-init.
+