Specifies the cloud-init configuration format. The default depends on the configured operating system type (`ostype`. We use the `nocloud` format for Linux, and `configdrive2` for windows.
+`ciupgrade`: `<boolean>` ::
+
+do an automatic package upgrade after the first boot.
+
`ciuser`: `<string>` ::
User name to change ssh keys and password for instead of the image's configured default user.