Rohit,
Thanks Honja. That's helpful.
Let's say I don't use qnetd, can I achieve same with booth arbitrator?
That means to have two two-node clusters. Two-node cluster without
fencing is strictly no.
Booth arbitrator works for geo-clusters, can the same arbitrator be reused
for local clusters as well?
I'm not sure that I understand question. Booth just gives ticket to
(maximally) one of booth-sites.
Is it even possible technically?
The question is, what you are trying to achieve. If geo-cluster then
stonith for sites + booth is probably best solution. If the cluster is
more like a stretch cluster, then qnetd + stonith is enough.
And of course your idea (original one) should work too.
Honza
Regards,
Rohit
On Tue, Jul 14, 2020 at 3:32 PM Jan Friesse <jfrie...@redhat.com> wrote:
Rohit,
Hi Team,
Can I execute corosync-qnetd and booth-arbitrator on the same VM in a
different geo site? What's the recommendation? Will it have any
limitations
in a production deployment?
There is no technical limitation. Both qnetd and booth are very
lightweight and work just fine with high latency links.
But I don't really have any real-life experiences with deployment where
both booth and qnetd are used. It should work, but I would recommend
proper testing - especially what happens when arbitrator node disappears.
Due to my architecture limitation, I have only one arbitrator available
which is on a 3rd site. To handle cluster split-brain errors, I am
thinking
to use same arbitrator for local cluster as well.
STONITH is not useful in my case as it is limited only to ILO and VIRT.
Keep in mind that neither qdevice nor booth is "replacement" for stonith.
Regards,
Honza
[image: image.png]
Thanks,
Rohit
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