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

Iterators and Loops


In Ansible (and YAML for that matter), there is usually more than one way to accomplish any given automation. Automation actions can be implemented in simple YAML format or can be potentially grouped together by using the with_items iterator. In this section, we will take a look at iterators and learn how we can leverage them to reduce the amount of YAML code we need to write and organize our playbook tasks more effectively.

If you are familiar with basic programming concepts, the idea of an iterator is not new or novel. In fact, Ansible supports multiple variations of an iterator: everything from traditional loops to Do...Until, numerical iterators, and many more. Iterators in the context of Ansible playbook's are almost identical in nature as traditional programming implementations of iterators, with a few specific syntax caveats.

In this section, we are going to look at the multiple loop variations that Ansible supports. We will begin by looking at standard basic loops...