Hi,
On 28 Dec 2010, at 20:32, Michael Schwartzkopff wrote:
> Hi,
>
> I have four nodes in a split site scenario located in two computing centers.
> STONITH is enabled.
>
> Is there and best practise how to deal with this setup? Does it make sense to
> set expected-quorum-votes to "3" to make the whole setup still running with
> one data center online? Is this possible at all?
>
> Is quorum needed with STONITH enabled?
>
> Is there a quorum server available already?
I couldn't see a quorum server in Pacemaker so I have installed a third dummy
node which is not allowed to run any resources (using location constraints and
setting the cluster to not be symmetric) which just acts as a third vote. I am
hoping this effectively acts as a quorum server as a node that looses
connectivity will lose quorum and shut down its services whilst the other real
node will retain connectivity and thus quorum due to the dummy node still being
present.
Obviously this is quite wasteful of servers as you can only run a single
Pacemaker instance on a server (as far as I know) so that is a lot of dummy
servers when you run multiple pacemaker clusters... Solution for us is to use
virtualization - one physical server with VMs and each VM is a dummy node for a
cluster...
Best regards,
Anton
>
> Thanks for any hints,
>
> Greetings!
>
> --
> Dr. Michael Schwartzkopff
> Guardinistr. 63
> 81375 München
>
> Tel: (0163) 172 50 98
> _______________________________________________
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>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
Best regards,
Anton
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/
_______________________________________________
Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
