On 21/06/16 01:05 PM, Dimitri Maziuk wrote: > On 06/21/2016 11:47 AM, Digimer wrote: > >> If you don't need to coordinate services/access, you don't need HA. >> >> If you do need to coordinate services/access, you need fencing. > > So what you're saying is we *cannot* run a pacemaker cluster without a > tiebreaker node *and* a network-controlled power socket. > > I knew that, actually, that's why I hung on to heartbeat for as long as > I could. It'd be nice to have it spelled out in bold at the start of > every "explained from scratch" document on clusterlabs.org for the young > players.
Quorum is optional. Fencing is not. If you run a 2-node cluster, then you just need to take a couple precautions, like adding 'delay="15"' to the preferred node's stonith definition so that it will win if comms break. Last I checked, CfS did emphasize the need for stonith. I know I certainly explain it (over and over again) whenever it comes up. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ Users mailing list: Users@clusterlabs.org http://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