all-in-one install via oVirt Node

[Perry Myers]

I believe folks have already gotten an all-in-one install working via a
Fedora 16 host which runs the oVirt Engine infrastructure and vdsm side
by side, so that the same host running OE can also run VMs under OE.

This conversation came up on users list from the perspective of oVirt Node:
http://lists.ovirt.org/pipermail/users/2012-February/000702.html

It doesn't make sense to install OE onto oVirt Node itself.  The lack of
a full OS and stateless FS would make that a waste of effort :)

However, what about doing the following:

* Boot oVirt Node, do basic config (install to disk, networking)
* Start a VM specifically to run oVirt Engine.  This VM would need to
  run off of either:
  + dedicated local storage (/data partition, so local disk must be
    large enough)
  + an iSCSI or FC LUN, but this LUN should never be part of the normal
    set of LUNs that oVirt Engine would use for other VMs
* Once this VM is up and running and oVirt Engine is up then you can
  register oVirt Node to that Engine
* You'd want to make sure that OE is not able to fence the node it is
  running on, and the resources needed by the OE VM must be subtracted
  from the total available resources (would this be done automatically
  already?)

To support this, I think we'd just need to provide an easy way for an
oVirt Node user to start up that mgmt VM outside of normal OE control.
Since libvirt is already present and we have a simple TUI version of
virt-manager, maybe we can utilize that interface to do this.

Of course, once the oVirt Node is registered with OE, the local
libvirt/virt-manager TUI should not be used for anything except for
management of the OE VM itself.

Would something like this be desirable for PoC or demo purposes?  If
folks don't think it's a good idea, I'm happy to not do it but curious
as to what people think.

Perry