Hello, I'm running a ceph 15.2.15 Octopus cluster, and in preparation to
update it I've first transformed it to cephadm following the instructions
in the website. All went well but now i'm having a problem running "ceph
daemon mds.* dump_ops_in_flight" because it gives me an error:
root@ceph-mds2:~# ceph -s |grep mds
mds: cephfs:2
{0=cephfs.ceph-mds1.edwbhe=up:active,1=cephfs.ceph-mds2.cjpsjm=up:active} 2
up:standby
root@ceph-mds2:~# ceph daemon mds.cephfs.ceph-mds2.cjpsjm
dump_ops_in_flight
admin_socket: exception getting command descriptions: [Errno 2] No such
file or directory
One thing i've noticed is that the name of the MDS daemons has changed,
before cephadm I could would refer them like mds.ceph-mds2 and now they're
called like mds.cephfs.ceph-mds2.cjpsjm, where the last part is a random
string that changes when the daemon is restarted. Running an strace on the
ceph daemon command I've find out that the problem is that the command is
looking for a socket in a location that doesn't exist:
root@ceph-mds2:~# strace ceph daemon mds.cephfs.ceph-mds2.cjpsjm
dump_ops_in_flight
[...]
connect(3, {sa_family=AF_UNIX,
sun_path="/var/run/ceph/ceph-mds.cephfs.ceph-mds2.cjpsjm.asok"}, 53) = -1
ENOENT (No such file or directory)
write(2, "admin_socket: exception getting "..., 90admin_socket: exception
getting command descriptions: [Errno 2] No such file or directory
Because the socket is actually in a folder inside /var/run/ceph:
root@ceph-mds2:~# ls /var/run/ceph/
d1fd0678-88c0-47fb-90da-e40a7a364442/
root@ceph-mds2:~# ls /var/run/ceph/d1fd0678-88c0-47fb-90da-e40a7a364442/
ceph-mds.cephfs.ceph-mds2.cjpsjm.asok
So if I link the socket to
/var/run/ceph/ceph-mds.cephfs.ceph-mds2.cjpsjm.asok then the command runs
without problems. That would be a fix but I would need to make the link
every time the daemon restarts, so I think that something is not right here
and should work out of the box. What can I do?
Besides that, I've noticed that after updating to cephadm and docker I
can't restart the MDS servers with "service ceph-mds@ceph-mds1 restart"
anymore, what's the proper method to restart them now?
Regards.
--
Luis
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