[Pacemaker] Beginner troubles

Andrew Beekhof andrew at beekhof.net
Tue Nov 30 04:59:50 EST 2010

On Mon, Nov 29, 2010 at 7:56 PM, Ziri Camden <zcamden at gmail.com> wrote:
> Hello,
> I'm evaluating Pacemaker and have been working my way through the
> excellent "Cluster from Scratch" document. I am using the stack as
> packaged in Debian Squeeze and attempting to set up a three-node
> cluster.
> Things work great as long as I stick to a 2-node setup with STONITH
> disabled and quorum ignored. As soon as I add a third node, things get
> odd. The third node isn't seen by the rest of the cluster and doesn't
> see its peers.

Usually its a firewall.  Are they all connected to the same switch?

> Telling it about its peers using crm configure node
> doesn't have any effect except to make them appear as UNCLEAN in crm
> status.
> After some restarts of all of the nodes, the original two have begun
> acting strangely. crm status says that node1 sees node1,node2 as up;
> node2 only sees node2 as up, and node3 is off in its' own world. I
> have started over by reinstalling the stack two or three times using
> different physical nodes and switch ports, so I'm pretty sure this
> isn't a hardware thing.
> So much for describing behavior.
> My corosync.conf is at http://pastebin.ca/2006011 ... All three hosts
> use the same configuration.
> A snippet of the 'third node' log files is at
> http://pastebin.ca/2006017. This segment just keeps on repeating.
> I don't have any complex configuration to preserve right now. What's
> the best way to 'start over' without reinstalling the whole stack? Can
> anyone shed light on what I'm missing? Dollars to doughnuts this is
> just me not understanding some core concept. I just want three online
> nodes that can see each other.
> Thanks in advance.
> ZC
> _______________________________________________
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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

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