>>> "Lentes, Bernd" <[email protected]> schrieb am 05.09.2018 um 18:13 in Nachricht <2073407402.9976609.1536164024840.javamail.zim...@helmholtz-muenchen.de>: > Hi guys, > > just to be sure. I thought (maybe i'm wrong) that having a VM on a shared > storage (FC SAN), e.g. in a raw file on an ext3 fs on that SAN allows > live-migration because pacemaker takes care that the ext3 fs is at any time
> only mounted on one node. I tried it, but "live"-migration wasn't possible. > The vm was always shutdown before migration. Or do i need OCFS2 ? > Could anyone clarifies this ? Hi Bernd, following you attempts to run VMs in a cluster always made me wonder why you ignore advice from people who have a working configuration. What you seem to do is have an ext3 filesystem that hosts image files for the VM, and you mount that filesystem on multiple nodes at once I guess. From the VM and image perspective that may work, but not from the ext3 filesystem perspective: It's very likely that your filesystem gets corrupted beyond being able to repair (Read: complete data loss possible). If you do not mount the ext3 filesystem on multiple nodes, you cannot live-migrate a VM with Xen (and probably also with KVM). AFAIK the same VM image must be present on both nodes taking part of a live migration. You could put the images on raw disks (one image per disk) or use a LVM LV, or use files on a cluster filesystem. The latter may have performance issues, especialy the cLVM/OCFS combination... Regards, Ulrich > > > Bernd > > -- > > Bernd Lentes > Systemadministration > Institut für Entwicklungsgenetik > Gebäude 35.34 - Raum 208 > HelmholtzZentrum münchen > [ mailto:[email protected] | > [email protected] ] > 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: MinDir'in Baerbel Brumme-Bothe > Geschaeftsfuehrer: Prof. Dr. med. Dr. h.c. Matthias H. Tschoep, Heinrich > Bassler, Dr. rer. nat. Alfons Enhsen > Registergericht: Amtsgericht Muenchen HRB 6466 > USt-IdNr: DE 129521671 > > > _______________________________________________ > Users mailing list: [email protected] > https://lists.clusterlabs.org/mailman/listinfo/users > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org _______________________________________________ Users mailing list: [email protected] https://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
