Fencing is required on all clusters, and specially on 2-node ones. https://www.alteeve.com/w/The_2-Node_Myth
digimer On 2018-06-20 05:53 PM, Casey & Gina wrote: > Does this mean that fencing can't actually work in a 2-node cluster?? Or is > it just that the delay needs set differently on one of the hosts and it will > start working? > >> On 2018-06-20, at 3:50 PM, Digimer <[email protected]> wrote: >> >> On 2018-06-20 05:46 PM, Jehan-Guillaume de Rorthais wrote: >>> On Wed, 20 Jun 2018 17:24:41 -0400 >>> Digimer <[email protected]> wrote: >>> >>>> Make sure quorum is disabled. Quorum doesn't work on 2-node clusters. >>> >>> It does with the "two_node" parameter enabled in corosync.conf...as far as I >>> understand it anyway... >> >> It doesn't, that option disables quorum in corosync. >> >> Quorum is floor(($nodes / 2) + 1). So in a 3-node, that is 3 -> 1.5 -> >> 2.5 -> 2 votes needed for quorum. In a 2-node, that is 2 -> 1 -> 2 -> 2 >> votes needed for quorum, meaning you can't lose a node to operate (which >> is kinda not HA :) ). >> >> -- >> Digimer >> Papers and Projects: https://alteeve.com/w/ >> "I am, somehow, less interested in the weight and convolutions of >> Einstein’s brain than in the near certainty that people of equal talent >> have lived and died in cotton fields and sweatshops." - Stephen Jay Gould > > _______________________________________________ > Users mailing list: [email protected] > 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 > -- Digimer Papers and Projects: https://alteeve.com/w/ "I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops." - Stephen Jay Gould _______________________________________________ Users mailing list: [email protected] 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
