On 04/04/2017 10:01 AM, Ján Poctavek wrote: > Hi, > > I came here to ask for some inspiration about my cluster setup. > > I have 3-node pcs+corosync+pacemaker cluster. When majority of nodes > exist in the cluster, everything is working fine. But what recovery > options do I have when I lose 2 of 3 nodes? If I know for sure that the > missing nodes are turned off, is there any command to force start of the > resources? The idea is to make the resources available (by > administrative command) even without majority of nodes and when the > other nodes become reachable again, they will normally join to the > cluster without any manual intervention. > > All nodes are set with wait_for_all, stonith-enabled=false and > no-quorum-policy=stop. > > Thank you. > > Jan
In general, no. The cluster must have quorum to serve resources. However, corosync is versatile in how it can define quorum. See the votequorum(5) man page regarding last_man_standing, auto_tie_breaker, and allow_downscale. Also, the newest version of corosync supports qdevice, which is a special quorum arbitrator. _______________________________________________ Users mailing list: Users@clusterlabs.org 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
