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
