How to specify domain name for the overcloud in Red Hat OpenStack Platform

Issue

After deployment of Overcloud all servers have domain localdomain like overcloud-compute-0.localdoman. Is there a way to define our own domain name?

• Overcloud deploy can fail because domain name isn't set correctly in undercloud configuration.
  journalctl -u os-collect-config from overcloud controller:

Scope(Haproxy::Config[haproxy]): haproxy: The $merge_options parameter will default to true in the next major release. Please review the documentation regarding the implications.\u001b[0m\n\u001b[1;31mError: Could not prefetch mysql_user provider 'mysql': Execution of '/usr/bin/mysql -NBe SELECT CONCAT(User, '@',Host) AS User FROM mysql.user' returned 1: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)\u001b[0m\n\u001b[1;31mError: /usr/bin/clust

• Galera fails to sync because of hostname problem
• pcs status

 Master/Slave Set: galera-master [galera]
     galera     (ocf::heartbeat:galera):        FAILED Master rh-cntrl1 (blocked)
     galera     (ocf::heartbeat:galera):        FAILED Master rh-cntrl0 (blocked)
 Masters: [ ops2-rh-cntrl2 ]