Learning OpenStack Networking - Third Edition

Setting the hostnames

Before installing OpenStack, ensure that each node in the environment has been configured with its proper hostname. Use the hostnamectl command on each host to set the hostname accordingly:

Host	Command
controller01	hostnamectl set-hostname controller01
compute01	hostnamectl set-hostname compute01
compute02	hostnamectl set-hostname compute02
compute03	hostnamectl set-hostname compute03
snat01	hostnamectl set-hostname snat01

To simplify communication between hosts, it is recommended that DNS or a local name resolver be used to resolve hostnames. Using a text editor, update the /etc/hosts file on each node to include the management IP address and hostname of all nodes:

10.10.0.100 ...