Re: [libvirt-users] Migration with rbd storage backend

On 05/19/2012 06:24 AM, Andrey Korolyov wrote: I haven't used rbd storage, so I'm not sure what might be the problem there. although this might be a hint; our code might be checking something that makes sense for a disk file, but not for an rbd storage volume. The problem is that snapshots involve more than just the snapshot data, it also involves the libvirt XML associated with each snapshot. As this XML can be quite lengthy, we have no way to send _all_ snapshots in a single migration command. It is probably possible to implement some form of handshaking, where migration proceeds to pass a series of RPC messages, one per snapshot, to properly transfer all the snapshots, but no one has coded it yet. In the meantime, it is still possible for you to dump the snapshot XML for all snapshots on the source, then delete the metadata for those snapshots, then do the migration, then redefine the snapshot metadata on the destination, to achieve the same effect manually. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org