Hi, everyone.
I upgraded one of our ceph clusters from Hammer to Jewel. After upgrading, I can’t start ceph-mon through “systemctl start ceph-mon@ceph1”, while, on the other hand, I can start ceph-mon, either as user ceph or root, if I directly call “/usr/bin/ceph-mon �Ccluster ceph �Cid ceph1 �Csetuser ceph �Csetgroup ceph”. I looked “/var/log/messages”, and find that the reason systemctl can’t start ceph-mon is that ceph-mon can’t access its configured data directory. Why ceph-mon can’t access its data directory when its called by systemctl?
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