Ansible PlayBooks

Ansible playbooks are a way to send commands to remote computers in a scripted way. Instead of using Ansible commands individually to remotely configure computers from the command line, you can configure entire complex environments by passing a script to one or more systems.

Ansible playbooks are written in the YAML data serialization format. If you don't know what a data serialization format is, think of it as a way to translate a programmatic data structure (lists, arrays, dictionaries, etc) into a format that can be easily stored to disk. The file can then be used to recreate the structure at a later point. JSON is another popular data serialization format, but YAML is much easier to read.

Each playbook contains one or more plays, which map hosts to a certain function. Ansible does this through something called tasks, which are basically module calls.


https://docs.ansible.com/ansible/devel/user_guide/playbooks.html

Playbook example :

You should write the code in file and save it as .yaml

==========================================

This playbook start the Apache daemon if it failed


---


- hosts: webserver
  user: root

  tasks:
  - name: Ensure the Apache daemon has started
    service: name=httpd state=started


 ==========================================


This playbook use copy module to copy the variable to destination path


---

- hosts:  webserver
  user: root
  vars:
   motd_warning: 'Welcome to Ansible\n'
  tasks:
  - name: sample motd
    copy:
     dest: /etc/motd
     content: "{{motd_warning }}"

==========================================

How to run ansible playbook.

ansible-playbook  ansibleyamlfile.yaml