Mastering OpenStack - Second Edition

Playbooks

Playbooks are the main configuration files in Ansible. They describe the complete system deployment plan. Playbooks are composed of a series of tasks and are executed from top to bottom. The tasks themselves refer to group of hosts that must be deployed with roles. Ansible playbooks are written in YAML.

The following is an example of a simple Ansible playbook:

--- - hosts: webservers   vars:     http_port: 8080   remote_user: root   tasks:   - name: ensure apache is at the latest version     yum: name=httpd state=latest   - name: write the apache config file     template: src=/srv/httpd.j2 dest=/etc/httpd.conf     notify:   - restart apache   handlers:   - name: restart apache     service: name=httpd state=restarted