Currently the Nova libvirt driver declares that it wants to have a libvirt install version >= 0.9.6 One of the things we're doing in libvirt is to split the python binding out of the main libvirt codebase, uploading it to PyPI and allowing it to build against multiple versions of libvirt. We are only able todo this for libvirt versions 0.9.11 or newer. We'd like to have Nova using libvirt-python off PyPI, and would also like to remove some cruft from the Nova code relating to old libvirt versions. In addition none of the automating testing done as part of the dev/release process runs on a distro with such an old libvirt, so these codepaths aren't strongly validated. Thus I have proposed that we increase the min required libvirt version to 0.9.11 To see how/what this is likely to impact we put together a table of common distro platforms for OpenStack and their min versions https://wiki.openstack.org/wiki/LibvirtDistroSupportMatrix The only distro listed there that lacks libvirt 0.9.11 is the Ubuntu 12.04 LTS release. We believe that anyone using OpenStack on Ubuntu 12.04 LTS will have the Cloud Archive repository enabled which includs much newer libvirt. So don't believe there's any compat problem here. If you are using OpenStack Nova + libvirt driver on a distro that is not listed in that wiki page and are likely to want to use the Icehouse release without first upgrading your distro, please say so now. If you have other distros to add feel free to update the wiki page above. See also http://lists.openstack.org/pipermail/openstack-dev/2013-November/019767.html Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|