> On Mon, Jul 26, 2021 at 4:53 PM john tillman <jo...@panix.com> wrote: >> >> >> >> Maybe explain how it should work: >> >> If the two nodes cannot rech each other, but each can reach the ping >> >> node, >> >> which node has the quorum then? >> >> >> > >> > Guess both - which is what is played down as 'disadvantage' in the >> > description >> > below ;-) >> > >> > >> >> It is not perfect, I agree, but it may be better than nothing at all. >> >> As for how it worked in my head: >> >> I would have used the switch's IP address as the "ping" tie breaker; a >> common connection point between the two nodes. My assumption is that if >> there was network loss by Node A then it would lose quorum. In the mean >> time Node B would still reach the switch, achieve quorum, and start/move >> resources. >> > > You seriously misunderstand what "split brain" means. Once more - both > nodes are up, neither node can contact another node, both nodes can > ping switch. What should each node do now? > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ > >
They would continue running their resources and we would have split brain. So there is no safe way to support a two node cluster 100% of the time. But when all you have are two nodes and a switch ... well, when life gives you lemons ... Thank you again for the response and I apologize for beating a dead horse here. _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/