We have a Nautilus cluster that just got hit by a bad power outage. When
the admin systems came back up, only the ceph-mgr process was running (all
the ceph-mon processes would not start). I tried following the instructions
in
https://docs.ceph.com/en/latest/rados/troubleshooting/troubleshooting-mon/
(particularly the "Recovery using OSDs" section). I got it so the mon
processes would start, but then the ceph-mgr process died, and would not
restart. Not sure how to recover so both ceph-mgr and ceph-mon processes
run. In the meantime, all the data is gone. Any suggestions?
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