Thanks for the responses John. --Scott
On Wed, Feb 24, 2016 at 3:07 AM John Spray <[email protected]> wrote: > On Tue, Feb 23, 2016 at 5:36 PM, Scottix <[email protected]> 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 > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > >
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