On Tue, Feb 23, 2016 at 5:36 PM, Scottix <scottix@xxxxxxxxx> wrote: > I had a weird thing happen when I was testing an upgrade in a dev > environment where I have removed an MDS from a machine a while back. > > I upgraded to 0.94.6 and low and behold the mds daemon started up on the > machine again. I know the /var/lib/ceph/mds folder was removed becaues I > renamed it /var/lib/ceph/mds-removed and I definitely have restarted this > machine several times with mds not starting before. > > Only thing I noticed was the auth keys were still in play. I am assuming the > upgrade recreated the folder and found it still had access so it started > back up. I don't see how the upgrade would have recreated auth keys for the MDS, unless you mean some external upgrade script rather than just the packages on the machine? > I am guessing we have to add one more step in the removal mds from this post > http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-January/045649.html > > 1 Stop the old MDS > 2 Run "ceph mds fail 0" > 3 Run "ceph auth del mds.<name>" Yes, good point, folks should also do the "auth del" part. > I am a little weary of command 2 since there is no clear depiction of what 0 > is. Is this command better since it is more clear "ceph mds rm 0 mds.<name>" '0' in this context means rank 0, i.e. whichever active daemon holds that rank at the time. If you have more than one daemon, the you may not need to do this; if the daemon you're removing is not currently active (i.e. not holding a rank) then you don't actually need to do this. Cheers, John > Is there anything else that could possibly resurrect it? Nope, not that I can think of. I actually don't understand how it got resurrected in this instance because removing its /var/lib/ceph/mds/... directory should have destroyed its auth keys. John > Best, > Scott > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |