On Wed, Apr 7, 2021 at 11:27 PM d tbsky <tbs...@gmail.com> wrote: > Reid Wahl <nw...@redhat.com> > > I don't think we do require fencing for single-node clusters. (Anyone at > Red Hat, feel free to comment.) I vaguely recall an internal mailing list > or IRC conversation where we discussed this months ago, but I can't find it > now. I've also checked our support policies documentation, and it's not > mentioned in the "cluster size" doc or the "fencing" doc. > > since the cluster is 100% alive or 100% dead with single node, I > think fencing/quorum is not required. I am just curious what is the > usage case. since RedHat supports it, it must be useful in real > scenario. >
Disaster recovery is the main use case we had in mind. See the RHEL 8.2 release notes: - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.2_release_notes/rhel-8-2-0-release#enhancement_high-availability-and-clusters I thought I also remembered some other use case involving MS SQL, but I can't find anything about it so I might be remembering incorrectly. -- Regards, Reid Wahl, RHCA Senior Software Maintenance Engineer, Red Hat CEE - Platform Support Delivery - ClusterHA
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