On Tue, Dec 28, 2010 at 10:21 PM, Anton Altaparmakov <ai...@cam.ac.uk> wrote: > 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...
With recent 1.1.x builds it should be possible to run just the corosync piece (no pacemaker). > > Best regards, > > Anton > >> >> Thanks for any hints, >> >> Greetings! >> >> -- >> Dr. Michael Schwartzkopff >> Guardinistr. 63 >> 81375 München >> >> Tel: (0163) 172 50 98 >> _______________________________________________ >> 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 > > 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 > _______________________________________________ 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
