[ceph-users] Re: Ceph OSDs suddenly use public network for heardbeat_check

In fact, when we start up the cluster, we don't have DNS available to resolve the IP addresses, and for a short while, all OSDs are located in a new host called "localhost.localdomain". At that point, I fixed it by setting the static hostname using `hostnamectl set -hostname xxx`.

why not put values in /etc/hosts (also from the other hosts)