openstack/openstack-ansible
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openstack-ansible/doc/source/install-guide/overview-ansible.rst
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Home OpenStack Ansible Installation Guide

Ansible

OpenStack Ansible Deployment uses a combination of Ansible and Linux Containers (LXC) to install and manage OpenStack. Ansible provides an automation platform to simplify system and application deployment. Ansible manages systems using Secure Shell (SSH) instead of unique protocols that require remote daemons or agents.

Ansible uses playbooks written in the YAML language for orchestration. For more information, see Ansible - Intro to Playbooks.

In this guide, we refer to the host running Ansible playbooks as the deployment host and the hosts on which Ansible installs OSA as the target hosts.

A recommended minimal layout for deployments involves five target hosts in total: three infrastructure hosts, one compute host, and one logging host. All hosts require three network interfaces. More information on setting up target hosts can be found in the section called "Host layout".

For more information on physical, logical, and virtual network interfaces within hosts see the section called "Host networking".