For more information regarding Ansible, refer to the following URLs:
The Ansible documentation: http://docs.ansible.com/
The Jinja2 template documentation: http://jinja.pocoo.org/docs/dev/
Ansible Example Playbooks: https://github.com/ansible/ansible-examples
Ansible MySQL Roles by Benno Joy and Jeff Geerling:
Ansible Nginx Role by Benno Joy and DAUPHANT Julien: https://github.com/jdauphant/ansible-role-nginx
Multistage Environments with Ansible: http://rosstuck.com/multistage-environments-with-ansible/
Ansible project's Google group thread on how to create Ansible environments: https://groups.google.com/forum/#!topic/ansible-project/jd3cuR7rqCE
Caching Facts in Ansible by Jan-Piet Mens: http://jpmens.net/2015/01/29/caching-facts-in-ansible/
Orchestration, You keep Using that Word by Michael DeHaan: http://www.ansible.com/blog/orchestration-you-keep-using-that-word