On 11/29/2017 04:23 PM, Kristoffer Grönlund wrote: > Adam Spiers <aspi...@suse.com> writes: > >> - The whole cluster is shut down cleanly. >> >> - The whole cluster is then started up again. (Side question: what >> happens if the last node to shut down is not the first to start up? >> How will the cluster ensure it has the most recent version of the >> CIB? Without that, how would it know whether the last man standing >> was shut down cleanly or not?) > This is my opinion, I don't really know what the "official" pacemaker > stance is: There is no such thing as shutting down a cluster cleanly. A > cluster is a process stretching over multiple nodes - if they all shut > down, the process is gone. When you start up again, you effectively have > a completely new cluster. > > When starting up, how is the cluster, at any point, to know if the > cluster it has knowledge of is the "latest" cluster? The next node could > have a newer version of the CIB which adds yet more nodes to the > cluster.
To make it even clearer imagine a node being reverted to a previous state by recovering it from a backup. Regards, Klaus > > The only way to bring up a cluster from being completely stopped is to > treat it as creating a completely new cluster. The first node to start > "creates" the cluster and later nodes join that cluster. > > Cheers, > Kristoffer > _______________________________________________ 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
