Umar
Ceph is stable for production , there are a large number of ceph clusters deployed and running smoothly in PRODUCTIONS and countless in testing / pre-production.
Since you are facing problems with your ceph testing , it does not mean CEPH is unstable.
I would suggest put some time troubleshooting your problem.
What i see from your logs --
1) you have 2 Mons thats a problem ( either have 1 or have 3 to form quorum ) . Add 1 more monitor node
2) out of 2 OSD , only 1 is IN , check where is the other one and try bringing both of them UP . Add few more OSD's to remove health warning . 2 OSD is a very less numbers for OSD
Many Thanks
Karan Singh
Karan Singh
From: "Umar Draz" <unix.co@xxxxxxxxx>
To: ceph-users@xxxxxxxx
Sent: Tuesday, 17 December, 2013 8:51:27 AM
Subject: After reboot nothing worked
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To: ceph-users@xxxxxxxx
Sent: Tuesday, 17 December, 2013 8:51:27 AM
Subject: After reboot nothing worked
Hello,
I have 2 node ceph cluster, I just rebooted both of the host just for testing that after rebooting the cluster remain work or not, and the result was cluster unable to start.
here is ceph -s output
health HEALTH_WARN 704 pgs stale; 704 pgs stuck stale; mds cluster is degraded; 1/1 in osds are down; clock skew detected on mon.kvm2
monmap e2: 2 mons at {kvm1=192.168.214.10:6789/0,kvm2=192.168.214.11:6789/0}, election epoch 16, quorum 0,1 kvm1,kvm2
mdsmap e13: 1/1/1 up {0=kvm1=up:replay}
osdmap e29: 2 osds: 0 up, 1 in
pgmap v68: 704 pgs, 4 pools, 9603 bytes data, 23 objects
1062 MB used, 80816 MB / 81879 MB avail
704 stale+active+clean
according to this useless documentation.
I tried ceph osd tree
the output was
# id weight type name up/down reweight
-1 0.16 root default
-2 0.07999 host kvm1
0 0.07999 osd.0 down 1
-3 0.07999 host kvm2
1 0.07999 osd.1 down 0
Then i tried
sudo /etc/init.d/ceph -a start osd.0
sudo /etc/init.d/ceph -a start osd.1
to start the osd on both host the result was
/etc/init.d/ceph: osd.0 not found (/etc/ceph/ceph.conf defines , /var/lib/ceph defines )
/etc/init.d/ceph: osd.1 not found (/etc/ceph/ceph.conf defines , /var/lib/ceph defines )
Now question is what is this? is really ceph is stable? can we use this for production environment?
My both host has ntp running the time is upto date.
Br.
Umar
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