mon_initial_members = ceph1
mon_host =
10.0.0.1Important
The host setting is the short name of the node (i.e., not an fqdn). It is NOT an IP address either. Enter hostname -s on the command line to retrieve the name of the node. Do not use host settings for anything other than initial monitors unless you are deploying Ceph manually. You MUST NOT specify host under individual daemons when using deployment tools like chef or ceph-deploy, as those tools will enter the appropriate values for you in the cluster map.
В итоге mon_host это не IP, а просто короткое имя ноды? Я что-то не понял )