On 09/08/2016 03:55 PM, Scott Greenlese wrote: > > Hi all... > > I have a few very basic questions for the group. > > I have a 5 node (Linux on Z LPARs) pacemaker cluster with 100 > VirtualDomain pacemaker-remote nodes > plus 100 "opaque" VirtualDomain resources. The cluster is configured > to be 'symmetric' and I have no > location constraints on the 200 VirtualDomain resources (other than to > prevent the opaque guests > from running on the pacemaker remote node resources). My quorum is set > as: > > quorum { > provider: corosync_votequorum > } > > As an experiment, I powered down one LPAR in the cluster, leaving 4 > powered up with the pcsd service up on the 4 survivors > but corosync/pacemaker down (pcs cluster stop --all) on the 4 > survivors. I then started pacemaker/corosync on a single cluster >
"pcs cluster stop" shuts down pacemaker & corosync on my test-cluster but did you check the status of the individual services? > node (pcs cluster start), and this resulted in the 200 VirtualDomain > resources activating on the single node. > This was not what I was expecting. I assumed that no resources would > activate / start on any cluster nodes > until 3 out of the 5 total cluster nodes had pacemaker/corosync running. > > After starting pacemaker/corosync on the single host (zs95kjpcs1), > this is what I see : > > [root@zs95kj VD]# date;pcs status |less > Wed Sep 7 15:51:17 EDT 2016 > Cluster name: test_cluster_2 > Last updated: Wed Sep 7 15:51:18 2016 Last change: Wed Sep 7 15:30:12 > 2016 by hacluster via crmd on zs93kjpcs1 > Stack: corosync > Current DC: zs95kjpcs1 (version 1.1.13-10.el7_2.ibm.1-44eb2dd) - > partition with quorum > 106 nodes and 304 resources configured > > Node zs93KLpcs1: pending > Node zs93kjpcs1: pending > Node zs95KLpcs1: pending > Online: [ zs95kjpcs1 ] > OFFLINE: [ zs90kppcs1 ] > > . > . > . > PCSD Status: > zs93kjpcs1: Online > zs95kjpcs1: Online > zs95KLpcs1: Online > zs90kppcs1: Offline > zs93KLpcs1: Online > > So, what exactly constitutes an "Online" vs. "Offline" cluster node > w.r.t. quorum calculation? Seems like in my case, it's "pending" on 3 > nodes, > so where does that fall? Any why "pending"? What does that mean? > > Also, what exactly is the cluster's expected reaction to quorum loss? > Cluster resources will be stopped or something else? > Depends on how you configure it using cluster property no-quorum-policy (default: stop). > > > Where can I find this documentation? > http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/ > > > Thanks! > > Scott Greenlese - IBM Solution Test Team. > > > > Scott Greenlese ... IBM Solutions Test, Poughkeepsie, N.Y. > INTERNET: swgre...@us.ibm.com > PHONE: 8/293-7301 (845-433-7301) M/S: POK 42HA/P966 > > > > _______________________________________________ > Users mailing list: Users@clusterlabs.org > http://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 _______________________________________________ Users mailing list: Users@clusterlabs.org http://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