David - thanks much. I installed drbd, kept the skeleton (basically empty) config file in place on server C, and it has stopped trying to monitor. I still don't quite understand how a server not running a particular RA can monitor a service anyway?
But my immediate problem is indeed solved and I can keep symmetric "on." -- Brad Jones b...@jones.name Mobile: 303-219-0795 On Fri, Jun 8, 2012 at 4:45 AM, David Coulson <da...@davidcoulson.net> wrote: > Pacemaker needs to be able to monitor on all nodes. Maybe if you install > drbd on the third node but don't configure anything monitor will correctly > report it is not running over there, and your location rules will stop it > from even trying. > > Or just change the RA for DRBD to report not running instead of not > installed - I had to do that in a few cases where the RA needed the config > file to exist, but the file was on a filesystem managed by pacemaker. Seems > to work ok, and isn't impacting the cluster at all. > > > On 6/8/12 3:36 AM, Brad Jones wrote: >> >> I have a cluster with three nodes, A B and C. A and B can basically >> stand in for one another; they run a DRBD master/slave set, and >> failure of A where most things run normally fires up services on B. >> >> C helps arbitrate quorum and runs Stonith plugins. I've written >> location rules to prohibit most of the production services from >> running on node C. >> >> Problem is, the DRBD RA tries to monitor on node C, even though DRBD >> isn't even installed. (It fails, helpfully, "not installed.") I'm >> stuck with a slowly-incrementing failcount on C. >> >> When I give all services a default location rule and set >> symmetric-cluster="false", some of the resources stay running on A but >> most of the important ones stop. >> >> This was raised back in 2010 here: >> <http://oss.clusterlabs.org/pipermail/pacemaker/2010-April/005873.html> >> but I can't find much more about this issue on the web and there's >> only passing mention of it in the Pacemaker documentation. >> >> Bottom line: What's required to correctly configure a cluster with >> symmetric-cluster set to false? >> >> FYI I'm on pacemaker 1.1.6, heartbeat 3.0.5, on Ubuntu 10.04. >> >> Thanks! Brad >> -- >> Brad Jones >> b...@jones.name >> Mobile: 303-219-0795 >> >> _______________________________________________ >> 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://bugs.clusterlabs.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://bugs.clusterlabs.org
