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>.

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?

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?

Thanks
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