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
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