Book Image

Mastering Ansible, 4th Edition - Fourth Edition

By : James Freeman, Jesse Keating
Book Image

Mastering Ansible, 4th Edition - Fourth Edition

By: James Freeman, Jesse Keating

Overview of this book

Ansible is a modern, YAML-based automation tool (built on top of Python, one of the world’s most popular programming languages) with a massive and ever-growing user base. Its popularity and Python underpinnings make it essential learning for all in the DevOps space. This fourth edition of Mastering Ansible provides complete coverage of Ansible automation, from the design and architecture of the tool and basic automation with playbooks to writing and debugging your own Python-based extensions. You'll learn how to build automation workflows with Ansible’s extensive built-in library of collections, modules, and plugins. You'll then look at extending the modules and plugins with Python-based code and even build your own collections — ultimately learning how to give back to the Ansible community. By the end of this Ansible book, you'll be confident in all aspects of Ansible automation, from the fundamentals of playbook design to getting under the hood and extending and adapting Ansible to solve new automation challenges.
Table of Contents (18 chapters)
Section 1: Ansible Overview and Fundamentals
Section 2: Writing and Troubleshooting Ansible Playbooks
Section 3: Orchestration with Ansible

Chapter 10: Extending Ansible

It must be said that Ansible takes the kitchen sink approach to functionality and tries to provide, out of the box, every piece of functionality you might ever need. With the ansible-core package and its associated collections, there are almost 6,000 modules available for use within Ansible at the time of writing – compare that to the (roughly) 800 that were included when the second edition of this book was published! In addition to these, there is a rich plugin and filter architecture with numerous callback plugins, lookup plugins, filter plugins, and dynamic inventory plugins included. Now, collections provide a whole new vector through which new functionality can be provided.

Despite this, there will always be cases where Ansible doesn't quite perform the tasks required, especially in large and complex environments, or ones where bespoke in-house systems have been developed. Luckily, the design of Ansible, coupled with its open source...