On 03/04/2015 05:44 PM, Robert LeBlanc wrote: > If I remember right, someone has done this on a live cluster without > any issues. I seem to remember that it had a fallback mechanism if the > OSDs couldn't be reached on the cluster network to contact them on the > public network. You could test it pretty easily without much impact. > Take one OSD that has both networks and configure it and restart the > process. If all the nodes (specifically the old ones with only one > network) is able to connect to it, then you are good to go by > restarting one OSD at a time. > In the OSDMap each OSD has a public and cluster network address. If the cluster network address is not set, replication to that OSD will be done over the public network. So you can push a new configuration to all OSDs and restart them one by one. Make sure the network is ofcourse up and running and it should work. > On Wed, Mar 4, 2015 at 4:17 AM, Andrija Panic <andrija.panic@xxxxxxxxx> wrote: >> Hi, >> >> I'm having a live cluster with only public network (so no explicit network >> configuraion in the ceph.conf file) >> >> I'm wondering what is the procedure to implement dedicated >> Replication/Private and Public network. >> I've read the manual, know how to do it in ceph.conf, but I'm wondering >> since this is already running cluster - what should I do after I change >> ceph.conf on all nodes ? >> Restarting OSDs one by one, or... ? Is there any downtime expected ? - for >> the replication network to actually imlemented completely. >> >> >> Another related quetion: >> >> Also, I'm demoting some old OSDs, on old servers, I will have them all >> stoped, but would like to implement replication network before actually >> removing old OSDs from crush map - since lot of data will be moved arround. >> >> My old nodes/OSDs (that will be stoped before I implement replication >> network) - do NOT have dedicated NIC for replication network, in contrast to >> new nodes/OSDs. So there will be still reference to these old OSD in the >> crush map. >> Will this be a problem - me changing/implementing replication network that >> WILL work on new nodes/OSDs, but not on old ones since they don't have >> dedicated NIC ? I guess not since old OSDs are stoped anyway, but would like >> opinion. >> >> Or perhaps i might remove OSD from crush map with prior seting of >> nobackfill and norecover (so no rebalancing happens) and then implement >> replication netwotk? >> >> >> Sorry for old post, but... >> >> Thanks, >> -- >> >> Andrija Panić >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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