Hi,
i have a two node cluster with virtual guests as resources.
I'd like to snapshot the guests once in the night and thought i had a procedure.
But i realize that things in a cluster are a bit more complicated than expected :-))
I will shutdown the guests to have a clean snapshot.
I can shutdown the guests via pacemaker.
But then arises the first problem:
When i issue a "virsh snapshot-create-as" libvirt needs the domain name as a parameter.
but libvirt does not know the domains any longer. When the guests are shutdown a "virsh list --all"
on both nodes does not show any domain.
A look in the respective resource agent VirtualDomain explains why:
The domain is started with virsh create:
"# The 'create' command guarantees that the domain will be
# undefined on shutdown, ...
OK: Now i could of course define all domains with a virsh define.
But then i have immediately the next problem. Now i'd create the snapshots with
"virsh snapshot-create-as" and starts the domains afterwards via cluster.
But let's assume i issue that on node 1 and some guests are started afterwards via pacemaker on node 2.
I can't predict on which node the guests are starting.
Then i don't get a snapshot, right ?
What to do ?
Bernd
--
Bernd Lentes
Systemadministration
Institut für Entwicklungsgenetik
Gebäude 35.34 - Raum 208
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fax: +49 89 3187 2294
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