Although OpenStack-Ansible doesn’t fully support CentOS 7 yet, the support is almost ready. I have a four node Ocata cloud deployed on CentOS 7, but I decided to change things around a bit and use systemd-networkd instead of NetworkManager or the old rc scripts. This post will explain how to configure the network for an OpenStack-Ansible cloud on CentOS 7 with systemd-networkd. Each one of my OpenStack hosts has four network interfaces and each one has a specific task: