Hi! Maybe explain how your "node failed": Usually when I node has failed, fencing is just to make sure that the node is really dead, so in most cases it won't actually do a thing unless a false "node dead" had been detected. Fencing makes sure that the fenced node has absolutely no chance to access shared storage until it joined the cluster again (after reboot).
Regards, Ulrich >>> Patrick Whitney <pwhit...@luminoso.com> 01.10.18 19.44 Uhr >>> We tested with both, and experienced the same behavior using both fencing strategies: an abandoned DLM lockspace. More than once, within this forum, I've heard that DLM only supports power fencing, but without explanation. Can you explain why DLM requires power fencing? Best, -Pat On Mon, Oct 1, 2018 at 1:38 PM Vladislav Bogdanov <bub...@hoster-ok.com> wrote: > On October 1, 2018 4:55:07 PM UTC, Patrick Whitney <pwhit...@luminoso.com> > wrote: > >> > >> Fencing in clustering is always required, but unlike pacemaker that > >lets > >> you turn it off and take your chances, DLM doesn't. > > > > > >As a matter of fact, DLM has a setting "enable_fencing=0|1" for what > >that's > >worth. > > > > > >> You must have > >> working fencing for DLM (and anything using it) to function > >correctly. > >> > > > >We do have fencing enabled in the cluster; we've tested both node level > >fencing and resource fencing; DLM behaved identically in both > >scenarios, > >until we set it to 'enable_fencing=0' in the dlm.conf file. > > Do you have power or fabric fencing? Dlm requires former. > > > _______________________________________________ > Users mailing list: Users@clusterlabs.org > https://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 > -- Patrick Whitney DevOps Engineer -- Tools _______________________________________________ Users mailing list: Users@clusterlabs.org https://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
