Am Mittwoch, 28. Januar 2015, 14:20:51 schrieb Sergey Arlashin: > Hi! > > I have a small corosync/pacemaker based cluster which consists of 4 nodes. 2 > nodes are in standby mode, another 2 actually handle all the resources. > > corosync ver. 1.4.7-1. > pacemaker ver 1.1.11. > os: ubuntu 12.04. > > Inside our production environment which has a plenty of free ram,cpu etc > everything is working well. When I switch one node off all the resources > move to another without any problems. And vice versa. That's what I need :) > > Our staging environment has rather weak hardware (that's ok - it's just > staging :) ) and is rather busy. Sometimes it even doesn't have enough cpu > or disk speed to be stable. When that happens some of cluster resources > fail (which I consider to be normal), but also I can see the following crm > output: > > Node db-node1: standby > Node db-node2: standby > Online: [ lb-node1 lb-node2 ] > > Pgpool2 (ocf::heartbeat:pgpool): FAILED (unmanaged) [ lb-node2 > lb-node1 ] > Resource Group: IPGroup > FailoverIP1 (ocf::heartbeat:IPaddr2): Started [ lb-node2 > lb-node1 ] > > As you can see the resource ocf::heartbeat:IPaddr2 is started on both nodes > ( lb-node2 and lb-node1 ). But I can't figure out how than could happen.
Your config does not allow this, but since your HW is slow pacemaker runs into timeouts and corosync conneciton problems. You could debug the problem be tracing the event in the logs. With the command crm_mon -1rtf you find the time of the failure. Search around that time in the logs. If the communication in the cluster does not work, pacemaker sometimes behaves verry odd. Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein _______________________________________________ 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
