[Pacemaker] 2 Node Cluster: some principal questions

[Lentes, Bernd]

Hi,

thanks for the quick response. So the data is not destroyed if two identicals VM's access the LV simultaneouslay ? I thought it would be. I will have stonith too.
What is about live migration ? Is it possible with my setup ?


Bernd


--
Bernd Lentes

Systemadministration
Institut für Entwicklungsgenetik
HelmholtzZentrum münchen
bernd.lentes at helmholtz-muenchen.de
phone: +49 89 3187 1241
fax:   +49 89 3187 3826
http://www.helmholtz-muenchen.de/idg

Wer Visionen hat, soll zum Hausarzt gehen
Helmut Schmidt



________________________________
From: emmanuel segura [mailto:emi2fast at gmail.com]
Sent: Thursday, March 22, 2012 4:12 PM
To: The Pacemaker cluster resource manager
Subject: Re: [Pacemaker] 2 Node Cluster: some principal questions

if you have in you cluster vg exclusive="yes" and remember it's good idea have stonith configured

Il giorno 22 marzo 2012 15:52, Lentes, Bernd <bernd.lentes at helmholtz-muenchen.de<mailto:bernd.lentes at helmholtz-muenchen.de>> ha scritto:
Hi,

i'd like to establish a 2 Node-Cluster. My OS will be SLES 11 and HAE. My services will run in VM's using KVM. I will install the VM's in LV's, one LV for one VM. The LV's will be plain partitions, having no filesystem. I have read this is quicker with KVM than installing a VM in a LV with filesystem.
My LV's will reside on a FC SAN. Both nodes have access to the SAN. For the LV's, i will use cLVM.

My questions are:

- let's assume that, due to an error, a VM will run on both nodes. Does cLVM prevent that both VM's have simultaneously access to the corresponding LV ? So that the data is not destroyed.

- Is it possible that some VM's run on the first node and other VM's run on the second node simultaneously ?

- what do you think about my setup ?



Bernd

--
Bernd Lentes

Systemadministration
Institut für Entwicklungsgenetik
HelmholtzZentrum münchen
bernd.lentes at helmholtz-muenchen.de<mailto:bernd.lentes at helmholtz-muenchen.de>
phone: +49 89 3187 1241<tel:%2B49%2089%203187%201241>
fax:   +49 89 3187 3826<tel:%2B49%2089%203187%203826>
http://www.helmholtz-muenchen.de/idg

Wer Visionen hat, soll zum Hausarzt gehen
Helmut Schmidt

Helmholtz Zentrum München
Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)
Ingolstädter Landstr. 1
85764 Neuherberg
www.helmholtz-muenchen.de<http://www.helmholtz-muenchen.de>
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Geschäftsführer: Prof. Dr. Günther Wess und Dr. Nikolaus Blum
Registergericht: Amtsgericht München HRB 6466
USt-IdNr: DE 129521671

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________________________________
Helmholtz Zentrum München
Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)
Ingolstädter Landstr. 1
85764 Neuherberg
www.helmholtz-muenchen.de
Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe
Geschäftsführer: Prof. Dr. Günther Wess und Dr. Nikolaus Blum
Registergericht: Amtsgericht München HRB 6466
USt-IdNr: DE 129521671
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