https://bugzilla.redhat.com/show_bug.cgi?id=987710
--- Comment #1 from Pete Travis me@petetravis.com --- Just for your reference, I discovered a conversation[1] that discusses many of the same questions. A quick skim shows interest didn't end there; these guys might have an answer, and a tool/function ready for the release the guide is targeted for.
[1] https://www.redhat.com/archives/libvir-list/2013-March/msg00020.html