[ClusterLabs] How many nodes redhat cluster does supports

[Ken Gaillot]

On Wed, 2022-04-27 at 22:10 +0200, Valentin Vidić via Users wrote:
> On Thu, Apr 28, 2022 at 12:25:37AM +0500, Umar Draz wrote:
> > * sharedfs1_start_0 on g2fs-1 'error' (1): call=158,
> > status='complete',
> > exitreason='Couldn't mount device [/dev/shared_vg1/shared_lv1] as
> > /mnt/webgfs', last-rc-change='Tue Apr 26 01:07:45 2022',
> > queued=0ms,
> > exec=806ms
> 
> Maybe the gfs2 filesystem was created with 2 journals so it only
> supports 2 hosts at the same time?
> 

This does seem unrelated to the cluster software per se, and more
likely to be a GFS2 issue.

But for the record, the upstream software has no official limit on node
count; the only limits are in practice (network capabilities vs.
Corosync's token passing algorithm). Commercial support like RHEL
generally imposes their own limits based on practicality -- often 16 or
32 full cluster nodes (more are possible with Pacemaker Remote).
-- 
Ken Gaillot <kgaillot at redhat.com>