On Wed, Aug 30, 2023 at 3:34 PM David Dolan <daithido...@gmail.com> wrote: > > Hi All, > > I'm running Pacemaker on Centos7 > Name : pcs > Version : 0.9.169 > Release : 3.el7.centos.3 > Architecture: x86_64 > > > I'm performing some cluster failover tests in a 3 node cluster. We have 3 > resources in the cluster. > I was trying to see if I could get it working if 2 nodes fail at different > times. I'd like the 3 resources to then run on one node. > > The quorum options I've configured are as follows > [root@node1 ~]# pcs quorum config > Options: > auto_tie_breaker: 1 > last_man_standing: 1 > last_man_standing_window: 10000 > wait_for_all: 1 > > [root@node1 ~]# pcs quorum status > Quorum information > ------------------ > Date: Wed Aug 30 11:20:04 2023 > Quorum provider: corosync_votequorum > Nodes: 3 > Node ID: 1 > Ring ID: 1/1538 > Quorate: Yes > > Votequorum information > ---------------------- > Expected votes: 3 > Highest expected: 3 > Total votes: 3 > Quorum: 2 > Flags: Quorate WaitForAll LastManStanding AutoTieBreaker > > Membership information > ---------------------- > Nodeid Votes Qdevice Name > 1 1 NR node1 (local) > 2 1 NR node2 > 3 1 NR node3 > > If I stop the cluster services on node 2 and 3, the groups all failover to > node 1 since it is the node with the lowest ID > But if I stop them on node1 and node 2 or node1 and node3, the cluster fails. > > I tried adding this line to corosync.conf and I could then bring down the > services on node 1 and 2 or node 2 and 3 but if I left node 2 until last, the > cluster failed > auto_tie_breaker_node: 1 3 > > This line had the same outcome as using 1 3 > auto_tie_breaker_node: 1 2 3 > > So I'd like it to failover when any combination of two nodes fail but I've > only had success when the middle node isn't last. >
Use fencing. Quorum is not a replacement for fencing. With (reliable) fencing you can simply run pacemaker with no-quorum-policy=ignore. The practical problem is that usually the last resort that will work in all cases is SBD + suicide and SBD cannot work without quorum. _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
