[ClusterLabs] Two node cluster without fencing and no split brain?

[Digimer]

On 2021-07-21 3:26 a.m., Jehan-Guillaume de Rorthais wrote:
> Hi,
> 
> On Wed, 21 Jul 2021 04:28:30 +0000 (UTC)
> Strahil Nikolov via Users <users at clusterlabs.org> wrote:
> 
>> Hi,
>> consider using a 3rd system as a Q disk. Also, you can use iscsi from that
>> node as a SBD device, so you will have proper fencing .If you don't have a
>> hardware watchdog device, you can use softdog kernel module for that. Best
> 
> Having 3 nodes for quorum AND watchdog (using softdog in last resort) is enough,
> isn't it?
> But yes, having a shared storage to add a SBD device is even better.
> 
> Regards,

The third node with storage-based death is a way of creating a fence
configuration. It works because it's fencing, not because it's quorum.

-- 
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