Book Image

Implementing DevOps with Ansible 2

By : Jonathan McAllister
Book Image

Implementing DevOps with Ansible 2

By: Jonathan McAllister

Overview of this book

Thinking about adapting the DevOps culture for your organization using a very simple, yet powerful automation tool, Ansible 2? Then this book is for you! In this book, you will start with the role of Ansible in the DevOps module, which covers fundamental DevOps practices and how Ansible is leveraged by DevOps organizations to implement consistent and simplified configuration management and deployment. You will then move on to the next module, Ansible with DevOps, where you will understand Ansible fundamentals and how Ansible Playbooks can be used for simple configuration management and deployment tasks. After simpler tasks, you will move on to the third module, Ansible Syntax and Playbook Development, where you will learn advanced configuration management implementations, and use Ansible Vault to secure top-secret information in your organization. In this module, you will also learn about popular DevOps tools and the support that Ansible provides for them (MYSQL, NGINX, APACHE and so on). The last module, Scaling Ansible for the enterprise, is where you will integrate Ansible with CI and CD solutions and provision Docker containers using Ansible. By the end of the book you will have learned to use Ansible to leverage your DevOps tasks.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Developing Hello World Ansible Module


Now that we have a basic development environment setup, we are going to explore how to create Ansible modules by taking a look at the obligatory Hello World Ansible module implementation. By creating a Hello World module, we can get our feet wet in Ansible module development and learn the basic structures required for a successful implementation. Let's get started!

To begin our Hello World module, let's create a directory structure that reflects the following screenshot:

Once this structure has been created, let's begin filling in our Ansible Hello World module code. To accomplish this, alter the helloworld.py file to contain the following Python code:

#!/usr/bin/python
# The following Python code converts a simple "Hello Ansible" message into a json object 
# for use with an Ansible module call

import json

message = "Hello Ansible"
print(json.dumps({
 "Message" : message
}))

Once the preceding code has been implemented, we will want an efficient way to...