The ceph-volume services make sure that the right partitions are mounted at /var/lib/ceph/osd/ceph-X
In "simple" mode the service gets the necessary information from a json file (long-hex-string.json) in /etc/ceph ceph-volume simple scan/activate create the json file and systemd unit. ceph-disk used udev instead for the activation which was *very* messy and a frequent cause of long startup delays (seen > 40 minutes on encrypted ceph-disk OSDs) Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Thu, Dec 5, 2019 at 1:03 PM Ranjan Ghosh <gh...@pw6.de> wrote: > Hi all, > > After upgrading to Ubuntu 19.10 and consequently from Mimic to Nautilus, I > had a mini-shock when my OSDs didn't come up. Okay, I should have read the > docs more closely, I had to do: > > # ceph-volume simple scan /dev/sdb1 > > # ceph-volume simple activate --all > > Hooray. The OSDs came back to life. And I saw that some weird services > were created. Didn't give that much thought at first, but later I noticed > there is now a new service in town: > > === > > root@yak1 ~ # systemctl status > ceph-volume@simple-0-6585a10b-917f-4458-a464-b4dd729ef174.service > ceph-volume@simple-0-6585a10b-917f-4458-a464-b4dd729ef174.service - Ceph > Volume activation: simple-0-6585a10b-917f-4458-a464-b4dd729ef174 > Loaded: loaded (/lib/systemd/system/ceph-volume@.service; enabled; > vendor preset: enabled) > Active: inactive (dead) since Wed 2019-12-04 23:29:15 CET; 13h ago > Main PID: 10048 (code=exited, status=0/SUCCESS) > > === > > Hmm. It's dead. But my cluster is alive & kicking, though. Everything is > working. Why is this needed? Should I be worried? Or can I safely delete > that service from /etc/systemd/... since it's not running anyway? > > Another, probably minor issue: > > I still get a HEALTH_WARN "1 MDSs report oversized cache". But it doesn't > tell me any details and I cannot find anything in the logs. What should I > do to resolve this? Set mds_cache_memory_limit? How do I determine an > acceptable value? > > > Thank you / Best regards > > Ranjan > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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