Implementing DevOps with Ansible 2

Constructing an Ansible playbook

YAML's unique and well-formatted syntax provides a highly structured yet human-readable format for expressing data. More specifically, YAML's data structure is expressed in lists, with each list item containing key/value pairs (or dictionaries). At the beginning of each YAML file, YAML optionally supports a --- initiator (to notate the beginning of the YAML file), and conversely, at the end of each, YAML supports a ... terminator, which (as you may have guessed) indicates the end of a YAML file. Let's take a look at a very simple playbook as an example:

---- hosts: all  vars :    http_port : 80    tasks:    - name: Install nginx web server      apt: pkg=nginx state=installed update_cache=true      notify:        - start nginx

Now ...