hi taotao :) you can follow http://docs.ceph.com/docs/master/rados/operations/add-or-rm-mons/ , Remove the non-surviving or problematic monitors. For example ...
remember to backup the surviving monitor data before any futher. 2017-02-10 9:52 GMT+08:00 何涛涛(云平台事业部) <hetaotao...@pingan.com.cn>: > 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/monmap > > The 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：hetaotao...@pingan.com.cn > > > > > ************************************************************ > ******************************************************************** > The information in this email is confidential and may be legally > privileged. If you have received this email in error or are not the > intended recipient, please immediately notify the sender and delete this > message from your computer. Any use, distribution, or copying of this email > other than by the intended recipient is strictly prohibited. All messages > sent to and from us may be monitored to ensure compliance with internal > policies and to protect our business. > Emails are not secure and cannot be guaranteed to be error free as they > can be intercepted, amended, lost or destroyed, or contain viruses. Anyone > who communicates with us by email is taken to accept these risks. > > 收发邮件者请注意： > 本邮件含保密信息，若误收本邮件，请务必通知发送人并直接删去，不得使用、传播或复制本邮件。 > 进出邮件均受到本公司合规监控。邮件可能发生被截留、被修改、丢失、被破坏或包含计算机病毒等不安全情况。 > ************************************************************ > ******************************************************************** > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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