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 HelmholtzZentrum münchen [ mailto:bernd.lentes@helmholtz-muenchen.de | bernd.lentes(a)helmholtz-muenchen.de ] phone: +49 89 3187 1241 fax: +49 89 3187 2294 [ http://www.helmholtz-muenchen.de/idg | http://www.helmholtz-muenchen.de/idg ] wer Fehler macht kann etwas lernen wer nichts macht kann auch nichts lernen Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) Ingolstaedter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: NN Stellv.Aufsichtsratsvorsitzender: MinDirig. Dr. Manfred Wolter Geschaeftsfuehrer: Prof. Dr. med. Dr. h.c. Matthias Tschoep, Heinrich Bassler, Dr. rer. nat. Alfons Enhsen Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671 _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users

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