+`cicustom`: `[meta=<volume>] [,network=<volume>] [,user=<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>` ;;
+
+Specify a custom file containing all network data passed to the VM via cloud-init.
+
+`user`=`<volume>` ;;
+
+Specify a custom file containing all user data passed to the VM via cloud-init.
+