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

Applying Jinja in Ansible Playbook's


Jinja can be applied to playbooks in a few specific ways. The most common implementation of Jinja is the use of filters and variables within playbook YAML files. This information must be placed within the quoted context of YAML key/value structures. The key/value structure of YAML does normally support non-quoted values, but within the context of Jinja, we must have it within quotes. For example, let's consider the following:

---
- name: Simple Ansible Playbook that loops over hosts within Jinja
vars:
    say_hello
    say_something: "{{ say_hello }}"

tasks:
    - debug:
        msg: "{{ say_something }}"

As we can see from this playbook, the implementation of Jinja within the playbook has the {{...}} tags directly within quotes. The only location that supports non-quoted implementations of Jinja tags is within a Jinja template. Jinja templates are parsed differently from YAML and therefore support loose implementations of Jinja tags. Let's consider the...