The following review https://review.openstack.org/#/c/171098 attempts to raise the minimum libvirt version to 1.0.3. In May that was considered a no go - http://lists.openstack.org/pipermail/openstack-operators/2015-May/007012.html Can we reconsider that decision and up this to 1.2 for what we're regularly testing with. It would also allow some cleaning out of a lot of conditional pathing, which is getting pretty deep in ifdefs - https://github.com/openstack/nova/blob/251e09ab69e5dd1ba2c917175bb408c708843f6e/nova/virt/libvirt/driver.py#L359-L424 -Sean -- Sean Dague http://dague.net