[Gluster-users] 3 node NFS-Ganesha Cluster

[Soumya Koduri]

Hi,
> But are you telling me that in a 3-node cluster,
> quorum is lost when one of the nodes ip is down?

yes. Its the limitation with Pacemaker/Corosync. If the nodes 
participating in cluster cannot communicate with majority of them 
(quorum is lost), then the cluster is shut down.

>
> However i am setting up a additional node to test a 4-node setup, but
> even then if i put down one node and nfs-grace_start
> (/usr/lib/ocf/resource.d/heartbeat/ganesha_grace) did not run properly
> on the other nodes, could it be that the whole cluster goes down as
> quorum lost again?

That's strange. We have tested quite a few times such configuration but 
haven't hit this issue. (CCin Saurabh who has been testing many such 
configurations).

Recently we have observed resource agents (nfs-grace_*) timing out 
sometimes esp when any node is taken down. But that shouldn't cause the 
entire cluster to shutdown.
Could you check the logs (/var/log/messages, /var/log/pacemaker.log) for 
any error/warning reported when one node is taken down in case of 4-node 
setup.

Thanks,
Soumya