You only have one osd node (ceph4). The default replication requirements
for your pools (size = 3) require osd's spread over three nodes, so the
data can be replicate on three different nodes. That will be why your pgs
are degraded.
You need to either add mode osd nodes or reduce your size setting down to
the number of osd nodes you have.
Setting your size to 1 would be a bad idea, there would be no redundancy in
your data at all. Loosing one disk would destroy all your data.
The command to see you pool size is:
sudo ceph osd pool get <poolname> size
assuming default setup:
ceph osd pool get rbd size
returns: 3
On 20 January 2015 at 10:51, Jiri Kanicky <j...@ganomi.com> wrote:
> Hi,
>
> I just would like to clarify if I should expect degraded PGs with 11 OSD
> in one node. I am not sure if a setup with 3 MON and 1 OSD (11 disks) nodes
> allows me to have healthy cluster.
>
> $ sudo ceph osd pool create test 512
> pool 'test' created
>
> $ sudo ceph status
> cluster 4e77327a-118d-450d-ab69-455df6458cd4
> health HEALTH_WARN 512 pgs degraded; 512 pgs stuck unclean; 512 pgs
> undersized
> monmap e1: 3 mons at {ceph1=172.16.41.31:6789/0,
> ceph2=172.16.41.32:6789/0,ceph3=172.16.41.33:6789/0}, election epoch 36,
> quorum 0,1,2 ceph1,ceph2,ceph3
> osdmap e190: 11 osds: 11 up, 11 in
> pgmap v342: 512 pgs, 1 pools, 0 bytes data, 0 objects
> 53724 kB used, 9709 GB / 9720 GB avail
> 512 active+undersized+degraded
>
> $ sudo ceph osd tree
> # id weight type name up/down reweight
> -1 9.45 root default
> -2 9.45 host ceph4
> 0 0.45 osd.0 up 1
> 1 0.9 osd.1 up 1
> 2 0.9 osd.2 up 1
> 3 0.9 osd.3 up 1
> 4 0.9 osd.4 up 1
> 5 0.9 osd.5 up 1
> 6 0.9 osd.6 up 1
> 7 0.9 osd.7 up 1
> 8 0.9 osd.8 up 1
> 9 0.9 osd.9 up 1
> 10 0.9 osd.10 up 1
>
>
> Thank you,
> Jiri
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>
--
Lindsay
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