----- On Mar 9, 2018, at 7:05 PM, Bernd Lentes bernd.lentes@helmholtz-muenchen.de wrote:
It does not work as expected :-( My lv's are clustered, but snapshotting a clustered lv requires to activate the source lv exclusively on one node, which is not possible when it's mounted and files on it are open. So i have to try it with libvirt and qemu. I'd like to create the snapshot while running the guest, take the backup, and merge (or commit) the changes after the copy procedure, still with a running guest. Is there a way to do this ? I found https://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit , but my software seems to be too old: I have libvirt-1.2.5-23.3.1. But my virsh offers blockcommit:
virsh # help blockcommit NAME blockcommit - Start a block commit operation.
SYNOPSIS blockcommit <domain> <path> [<bandwidth>] [<base>] [--shallow] [<top>] [--delete] [--wait] [--verbose] [--timeout <number>] [--async]
DESCRIPTION Commit changes from a snapshot down to its backing image.
OPTIONS [--domain] <string> domain name, id or uuid [--path] <string> fully-qualified path of disk [--bandwidth] <string> bandwidth limit in MiB/s [--base] <string> path of base file to commit into (default bottom of chain) --shallow use backing file of top as base [--top] <string> path of top file to commit from (default top of chain) --delete delete files that were successfully committed --wait wait for job to complete --verbose with --wait, display the progress --timeout <number> with --wait, abort if copy exceeds timeout (in seconds) --async with --wait, don't wait for cancel to finish
But it doesn't work ? Although help offers it ?
Bernd
Hmm, it seems i really have a version too old. This is what i get: virsh # blockcommit windows7x64 /cluster/guests/servers_alive/sa_snap.qcow2 --wait --verbose error: Operation not supported: committing the active layer not supported yet Is there no way to achieve what i want ? Bernd Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) Ingolstaedter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Heinrich Bassler, Dr. Alfons Enhsen Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671