Hello,
Le 16/01/2017 à 11:50, Stéphane Klein a écrit :
Hi,
I have two OSD and Mon nodes.
I'm going to add third osd and mon on this cluster but before I want to
fix this error:
>
> [SNIP SNAP]
You've just created your cluster.
With the standard CRUSH rules you need one OSD on three different hosts
for an active+clean cluster.
You've created two OSDs already, are they on different hosts?
Also, your monitors. Keep in mind that an odd number of monitors is the
only good choice. So, 1, 3 or 5.
The reason for this? I'm sure you've already encountered this paragraph
from the documentation:
"Ceph uses the Paxos algorithm, which requires a majority of monitors
(i.e., 1, 2:3, 3:4, 3:5, 4:6, etc.) to form a quorum."
http://docs.ceph.com/docs/master/start/quick-ceph-deploy/#adding-monitors
But that's all in the docs, happy reading!
http://docs.ceph.com/docs/master/
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