On 2017-10-16 03:20 PM, Lentes, Bernd wrote: > > > ----- On Oct 16, 2017, at 7:38 PM, Digimer [email protected] wrote: > >> On 2017-10-16 01:24 PM, Lentes, Bernd wrote: >>> Hi, >>> >>> i have the following behavior: I put a node in maintenance mode, afterwards >>> stop >>> corosync on that node with /etc/init.d/openais stop. >>> This node is immediately fenced. Is that expected behavior ? I thought >>> putting a >>> node into maintenance does mean the cluster does not care anymore about that >>> node. >>> >>> OS on my nodes is SLES 11 SP4. >>> >>> Thanks. >>> >>> >>> Bernd >> >> Well, if you stop corosync, it would appear to leave gracefully from >> corosync's perspective so the other node should know that it didn't >> fail. However, and I am not a pacemaker expert, I would guess that >> pacemaker just saw the membership change that it wasn't expecting and >> invoked a fence. >> >> If you plan to remove a node, it is probably best to stop pacemaker, >> then stop corosync. >> >> Also, 'openais' is oooold. Is this an old cluster? Corosync came out of >> the openais project. > > Well, OS is SLES 11 SP4. That's not the most recent one. > Pacmekaer is 1.1.12. I didn't plan to remove the node, but to do some > maintenance on it. > > If i put the node in standby, then i can invoke "/etc/init.d/openais stop" > without that node getting fenced. > But then all resources on that node are stopped/migrated. If i don't want > that, i thought maintenance is the right way. > Am i wrong ? > > Ah, i just saw that i wasn't complete clear. The node is fenced after > stopping openais, not after putting it into maintenance. > I did that via "crm node maintenance <node>" > > Bernd
I understood what you meant about it getting fenced after stopping corosync. What I am not clear on is if you are stopping corosync on the normal node, or the node that is in maintenance mode. In either case, as I understand it, maintenance mode doesn't stop pacemaker, so it can still react to the sudden loss of membership. I wonder; Why are you stopping corosync? If you want to stop the node, why not stop pacemaker entirely first? -- Digimer Papers and Projects: https://alteeve.com/w/ "I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops." - Stephen Jay Gould _______________________________________________ Users mailing list: [email protected] http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
