This document provides an introduction to Ansible, an open source configuration management tool. It discusses how Ansible works by having a main server that pushes configuration changes out to remote hosts using SSH. Ansible configurations are defined using playbooks, which are lists of plays that specify the hosts and tasks to configure. Hosts are organized into groups in an inventory file. Modules define the specific configuration tasks and return JSON results. The document recommends optimizing SSH for Ansible's push-based approach.

1. Ansible Whirlwind Tour
An Introduction

2. whoami
Sushant Srivastava
I work at Akamai Technologies Pvt. Ltd.
Platform Infrastructure Engineer
On my day job I work on Java, Python, Ruby,
Perl and Shell.
@ssushant on Twitter

3. Motivation - The Devops Revolution

4. Ansible Configuration management
● Easy to read syntax
● Nothing to install on remote hosts
● Push-based
● Ansible scales down
● Built-in modules
● Thin layer of Abstraction

5. How Ansible Works
Main Server Remote

6. Ansible Playbook
Main orchestration
A list of Plays
Each play contains
○ A set of hosts to configure
○ A list of tasks to be executed on those hosts

7. The Play illustration

8. Ansible Inventory File
The default way to describe your hosts
An ini file
Hosts can be grouped into such groups as
webservers, database servers etc.

9. Ansible Module
from ansible.module_utils.basic import *
use main() to run your script logic
use exit_json with information
use fail_json with failure message

10. Ansible Tips
Ansible uses SSH by default, so SSH
optimizations will come handy.
SSH Multiplexing

11. Thank you