On 28 September 2016 at 19:22, Wido den Hollander <wido@xxxxxxxx> wrote: > > > > Op 28 september 2016 om 0:35 schreef "Nick @ Deltaband" <nick@xxxxxxxxxxxxx>: > > > > > > Hi Cephers, > > > > We need to add two new monitors to a production cluster (0.94.9) which has > > 3 existing monitors. It looks like it's as easy as ceph-deploy mon add <new > > mon>. > > > > You are going to add two additional monitors? 3 to 5? > Yes, we're going to add two. > > > What's the best practice in terms of when to update the existing monitor > > and osd ceph.conf file to include the new monitors in mon_initial_members > > and mon_hosts? Before adding the new monitor, afterwards, or doesn't it > > make any difference? > > > > Add the new monitor using ceph-deploy and afterwards update the configuration on all the nodes so that mon_host contains all the new Monitors. > Thanks for confirming. > > Will it cause any disruption on the cluster, or is it 100% safe to do with > > no disruption? Any steps we can take to minimise risk? > > > > A very short interruption (seconds) might occur when the monitors are electing. Nothing is 100% safe ofcourse, but this is a safe operation to do in production. > Understood, we'll give it a go. Thanks again. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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