----- On Mar 9, 2018, at 7:05 PM, Bernd Lentes bernd.lentes(a)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