Previous post: http://lists.openstack.org/pipermail/openstack-operators/2013-May/002917.html I'm a little late to the party, but figured I chime in my .2 cents. We currently run the majority of our asterisk instances inside KVM. We are on track to migrate to OpenStack Grizzly in the next 2 months. As for asterisk issues, we don't really have any. Obviously any sort of I/O bottleneck is going to be an issue, however once you have those issues worked out everything should work great. -- Paul Belanger | PolyBeacon, Inc. Jabber: paul.belanger at polybeacon.com | IRC: pabelanger (Freenode) Github: https://github.com/pabelanger | Twitter: https://twitter.com/pabelanger