The number of monitors recommended and the fact that a voting quorum is
the way it works is covered here:
http://ceph.com/docs/master/rados/deployment/ceph-deploy-mon/
but I agree that you should probably not get a HEALTH OK status when you
have just setup 2 (or in fact any even number of) monitors...HEALTH WARN
would make more sense, with a wee message suggesting adding at least one
more!
Regards
Mark
On 01/01/15 18:06, Jiri Kanicky wrote:
Hi,
I think you are right. I was too focused on the following line in docs:
"A cluster will run fine with a single monitor; however,*a single
monitor is a single-point-of-failure*." I will try to add another
monitor. Hopefully, this will fix my issue.
Anyway, I think that "ceph status" or "ceph health" should report at
least something in such state. Its quite weird that everything stops...
Thank you
Jiri
On 1/01/2015 15:51, Lindsay Mathieson wrote:
On Thu, 1 Jan 2015 03:46:33 PM Jiri Kanicky wrote:
Hi,
I have:
- 2 monitors, one on each node
- 4 OSDs, two on each node
- 2 MDS, one on each node
POOMA U here, but I don't think you can reach quorum with one out of two
monitors, you need a odd number:
http://ceph.com/docs/master/rados/configuration/mon-config-ref/#monitor-quorum
Perhaps try removing one monitor, so you only have one left, then take the
node without a monitor down.
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