Hey,
I tried to simulate the failure of 2 monitors including their monmap, and to bring them up in my testing cluster.
The ceph version is 10.2.5, the OS is REHL7.2, and the testing cluster has 3 nodes with 3 monitors and 24 osds, each node has 1 monitor and 8 osds.
So, I stopped the 2 (the mon.a and mon.c) of 3 ceph-mon daemon and delete all file of directory /var/lib/ceph/mon/ceph-a/
store.db, and then I tried to recover the ceph-mon daemon referring to the ceph documents, but there is something unexcepted happened. The recovery procedure is as following: To grab the monmap from another monitor (stop the monitor daemon before extract):
# ceph mon –i b –extract-monmap /tmp/monmapThe 2 ceph-mon are down, so I do need to stop the monitor.
To inject the monmap:
# ceph-mon –i a –inject-monmap /tmp/monmap
There is an error after that:
Invalid argument: /var/lib/ceph/mon/ceph-a/store.db: does not exist (create_if_missing is false)…… Error opening mon data directory at ‘/var/lib/ceph/mon/ceph-a’: (22) Invalid argument.
But the directory /var/lib/ceph/ceph-a is exist and the owner is ceph:ceph, why does it happen?
And is my simulation and recovery procedure right?
Best regards,
He taotao
EMAIL：HETAOTAO818@xxxxxxxxxx.
cn
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