Hi Henrik, Many thanks for your answer.
What settings in the ceph.conf are you referring to? These: mon_initial_members = mon_host = I was under the impression that mon_initial_members are only used when the cluster is being setup and are not used by the live cluster. Is this the case? If so, should I simply change the mon_host values? Is this value used by ceph clients to find ceph monitors? thanks Andrei > From: "Henrik Korkuc" <li...@kirneh.eu> > To: "ceph-users" <ceph-users@lists.ceph.com> > Sent: Friday, 22 July, 2016 13:04:36 > Subject: Re: [ceph-users] change of dns names and IP addresses of cluster > members > On 16-07-22 13:33, Andrei Mikhailovsky wrote: >> Hello >> We are planning to make changes to our IT infrastructure and as a result the >> fqdn and IPs of the ceph cluster will change. Could someone suggest the best >> way of dealing with this to make sure we have a minimal ceph downtime? > Can old and new network reach each other? If yes, then you can do it without > cluster downtime. You can change OSDs IP on server by server basis - stop > OSDs, > rename host, change IP, start OSDs. They should connect to cluster with new > IP. > Rinse and repeat for all. > As for mons you'll need to remove mon out of the cluster, then readd with new > name and IP, redistribute configs with new mons. Rinse and repeat. > Depending on your use case it is possible that you may have client downtime as > sometimes it is not possible to change client's config without a restart (e.g. > qemu machine config) >> Many thanks >> Andrei >> _______________________________________________ >> ceph-users mailing list ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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