This is basically the goal of Project Kronos: http://blog.xen.org/index.php/2011/07/22/project-kronos/ (http://blog.xen.org/index.php/2011/07...)

We have it working on Debian: http://wiki.xen.org/xenwiki/XAPI_on_debian (http://wiki.xen.org/xenwiki/XAPI_on_d...)

This particular problem is a nova package dependency problem. However, the approach you are taking is not a common or well supported one. Xen + libvirt + OpenStack is not a common path or well-supported.

The focus instead is on XenAPI-based hypervisors (for good reason - see dicussion at http://wiki.openstack.org/XenAPI )

I'll outline your options.

You can use XCP 1.1, which released today and has all the bit to do OpenStack properly. There are some clouds coming up on it.

You can start testing Kronos (currently on debian): http://blog.xen.org/index.php/2011/07/22/project-kronos/ (http://blog.xen.org/index.php/2011/07...)

We have work in progress to have Ubuntu packages as well as Debian packages. We'll put the Ubuntu packages in a PPA as soon as they are ready.

You could you Citrix XenServer 6

XCP is different. It is a pre-packages Xen distribution. Setting up OpenStack on XCP is done like: http://wiki.openstack.org/XenServerDevelopment (http://wiki.openstack.org/XenServerDe...) (by putting Nova in a VM).

I am working on some clarification text that we end up in the admin manual for nova soon. Work in progress is here: http://etherpad.openstack.org/openstack-xen (http://etherpad.openstack.org/opensta...)

There are also two recent presentations that cover Xen+OpenStack here:

http://blog.xen.org/index.php/2011/10/07/xen-openstack-design-summit/ (http://blog.xen.org/index.php/2011/10...) http://blog.xen.org/index.php/2011/10/11/a-glimpse-of-the-future-xen-openstack-conference/ (http://blog.xen.org/index.php/2011/10...)