On Mon, Feb 16, 2015 at 01:42:13PM +1100, Tony Breeds wrote:
Hello all, I'm new to both openstack and libvirt so I may get some of this slightly wrong[1].
Here is some context form the openstack world (which at least some of you are aware of). There are at least 2 open bug against openstack (nova) in the area of block/disk migration.
1) Live migration fails when the instance has a config-drive[2] Here openstack(nova) fails because a drive that nova expects to be migrated isn't migrated.
2) libvirt live_snapshot periodically explodes on libvirt 1.2.2 in the gate[3] Here openstack(nova) fails because a drive that nova expects NOT to be migrated is migrated.
On a related note, some weeks ago, I captured some context and analysis (including some debugging done by Dan Berrange and Eric Blake on public IRC channel mid-last year) for the above bug, since the actual bug has too many comments: https://kashyapc.fedorapeople.org/virt/openstack/nova-live-snapshot-bug-1334... The cause of it is almost narrowed down here by Dan in this comment https://bugs.launchpad.net/nova/+bug/1334398/comments/27 -- /kashyap