how create zone on a filesystem not a zpool on lofi?

 I don't like or want to have a zone created on a loopback mount. I think that's amazingly bad idea putting an extra layer of indirection in to degrade performance and confuse the heck out of admins.

Normal people create a zone as show in the Solaris documentation by specifying a zone path. It is fine if the zone path is zpool that's mounted to some directory under /guests. That gives you a separate filesystem for each guest. That's good, that's appropriate and matches the documentation.

This business of making a zpool out of a file created under /guests is an amazingly poor idea. The ZFS documentation recommends that one not use a file as a vdev for production but this violation of EIS is exactly waht Ops Center does. So how do I automatie zone creation, esp. using a server pool of global zones?