Lentes, Bernd
2016-Mar-02 14:03 UTC
[libvirt-users] VM's in a HA-configuration - synchronising vm config files
Hi, i'd like to establish a HA-Cluster with two nodes. My services will run inside vm's, the vm's are stored on a FC SAN, so every host has access to the vm's. But how can i keep the config files (xml-files under /etc/libvirt/qemu) synchronised ? Is there a possibility to store the config files somewhere else ? E.g. a partitition with ocfs2 on the SAN ? If not, what would you do ? Otherweise i'm thinking of a cron-job who synchronises the file each minute with rsync. Bernd -- Bernd Lentes Systemadministration institute of developmental genetics Gebäude 35.34 - Raum 208 HelmholtzZentrum München bernd.lentes@helmholtz-muenchen.de phone: +49 (0)89 3187 1241 fax: +49 (0)89 3187 2294 Wer Visionen hat soll zum Hausarzt gehen Helmut Schmidt 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, Dr. Alfons Enhsen, Renate Schlusen (komm.) Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671
Dominique Ramaekers
2016-Mar-02 14:15 UTC
Re: [libvirt-users] VM's in a HA-configuration - synchronising vm config files
>Van: libvirt-users-bounces@redhat.com [mailto:libvirt-users-bounces@redhat.com] Namens Lentes, Bernd >Verzonden: woensdag 2 maart 2016 15:04 >Aan: libvirt-ML >Onderwerp: [libvirt-users] VM's in a HA-configuration - synchronising vm config files > >Hi, > >i'd like to establish a HA-Cluster with two nodes. My services will run inside vm's, the vm's are stored on a FC SAN, so every host has access to the vm's. But how can i keep the config files >(xml-files under /etc/libvirt/qemu) synchronised ? Is there a possibility to store the config files somewhere else ? E.g. a partitition with ocfs2 on the SAN ? >If not, what would you do ? Otherweise i'm thinking of a cron-job who synchronises the file each minute with rsync. > > >Bernd > >--This looks simple enough... On host 1, virsh dumpxml for every running vm to a shared location On host 2, virsh define for these vm's Do the same the other way around...
Lentes, Bernd
2016-Mar-02 14:26 UTC
Re: [libvirt-users] VM's in a HA-configuration - synchronising vm config files
----- On Mar 2, 2016, at 3:15 PM, Dominique Ramaekers dominique.ramaekers@cometal.be wrote:>>Van: libvirt-users-bounces@redhat.com [mailto:libvirt-users-bounces@redhat.com] >>Namens Lentes, Bernd >>Verzonden: woensdag 2 maart 2016 15:04 >>Aan: libvirt-ML >>Onderwerp: [libvirt-users] VM's in a HA-configuration - synchronising vm config >>files >> >>Hi, >> >>i'd like to establish a HA-Cluster with two nodes. My services will run inside >>vm's, the vm's are stored on a FC SAN, so every host has access to the vm's. >>But how can i keep the config files >(xml-files under /etc/libvirt/qemu) >>synchronised ? Is there a possibility to store the config files somewhere else >>? E.g. a partitition with ocfs2 on the SAN ? >>If not, what would you do ? Otherweise i'm thinking of a cron-job who >>synchronises the file each minute with rsync. >> >> >>Bernd >> >>-- > > This looks simple enough... > > On host 1, virsh dumpxml for every running vm to a shared location > On host 2, virsh define for these vm's > > Do the same the other way around...Hi Dominique, i don't see a way to write with dumpxml directly into a file. Or do you mean by redirection ? 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, Dr. Alfons Enhsen, Renate Schlusen (komm.) Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671