Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Im using MAAS and juju to configure a small 3 node test cluster.

I have followed the Ceph charm read me instruction. Now I want to mount the ceph cluster.

I've created a secret file from the /etc/ceph/*keyring on the ceph clients.
When I try the mount, it takes several minutes and comes back with mount error = 5

$ mount.ceph nkant.ceph:/ /mnt -o name=admin,secretfile=root.secret
    mount error = 5 Input/output error

A google search on this tells me the issue is due the no MDS process responding. I've taken a look on the ceph nodes and there does not appear to be any trace of an MDS process.

Should MDS have been installed as part of deploying the ceph charm or am I missing a step somewhere ?

Could this be an issue here ?

My ceph health is HEALTH_WARN:

$ ceph -s

   health HEALTH_WARN 6 pgs degraded; 6 pgs stuck unclean
   monmap e2: 3 mons at {a8nke=,f7fby=,nkant=}, election epoch 6, quorum 0,1,2 a8nke,f7fby,nkant
   osdmap e7: 3 osds: 3 up, 3 in
   pgmap v112: 192 pgs: 186 active+clean, 6 active+degraded; 0 bytes data, 3103 MB used, 21439 MB / 24542 MB avail
   mdsmap e1: 0/0/1 up
share|improve this question
up vote 0 down vote accepted

The Ceph charm currently only supports Ceph Object and Block storage services; hence you won't find any running MDS daemons and support for CephFS right now!

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.