[ClusterLabs] Antw: Fencing with a 3-node (1 for quorum only) cluster

Digimer lists at alteeve.ca
Fri Aug 5 02:37:18 EDT 2016

On 05/08/16 02:19 AM, Ulrich Windl wrote:
>>>> Dan Swartzendruber <dswartz at druber.com> schrieb am 05.08.2016 um 00:56 in
> Nachricht <32eabeb57268bed57081646c772240c8 at druber.com>:
>> I'm setting up an HA NFS server to serve up storage to a couple of 
>> vsphere hosts.  I have a virtual IP, and it depends on a ZFS resource 
>> agent which imports or exports a pool.  So far, with stonith disabled, 
>> it all works perfectly.  I was dubious about a 2-node solution, so I 
>> created a 3rd node which runs as a virtual machine on one of the hosts.  
>> All it is for is quorum.  So, looking at fencing next.  The primary 
> I wonder what happens if the machine where the VM runs crashes (2 of 3 nodes down).

2 of 3 dead is loss of quorum. Surviving node stops offering cluster
services when it could have otherwise survived. Another (small) benefit
of a 2-node cluster.

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