I ran across the same issue when putting together an asymmetric cluster. Generally, I've found that it's necessary to make sure all nodes have the same resource-related backing software installed. For instance, I too have had to install DRBD on all nodes, even those not running DRBD. iSCSITarget is another one - even with the RA available, not having the proper service available for the monitor to query can cause a monitor error - which tends to nuke the resource on all nodes, even the properly configured ones. As it was explained to me, Pacemaker needs to be able to know that a resource isn't (or is) running on a node that it isn't (or is) supposed to be running on. Lack of resource agent (i.e. lack of ability to monitor) is not taken as an indication that such a resource isn't running there.
On 6/8/2012 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 -- Sincerely, Matthew O'Connor ----------------------------------------------------------------- Sr. Software Engineer PGP/GPG Key: 0x55F981C4 Fingerprint: E5DC A0F8 5A40 E4DA 2CE6 B5A2 014C 2CBF 55F9 81C4 Engineering and Computer Simulations, Inc. 11825 High Tech Ave Suite 250 Orlando, FL 32817 Tel: 407-823-9991 x315 Fax: 407-823-8299 Email: m...@ecsorl.com Web: www.ecsorl.com ----------------------------------------------------------------- CONFIDENTIAL NOTICE: The information contained in this electronic message is legally privileged, confidential and exempt from disclosure under applicable law. It is intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender immediately by return e-mail and delete the original message and any copies of it from your computer system. Thank you. _______________________________________________ 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
