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


Ansible is a piece of software, and software breaks; it's not a matter of if, but when. Invalid input, improper assumptions, and unexpected environments are all things that can lead to a frustrating situation when tasks and plays are not performing as expected. Introspection and debugging are troubleshooting techniques that can quickly turn frustration into elation when a root cause is discovered.

In this chapter, we learned about how to get Ansible to log its actions to a file, and how to change the verbosity level of Ansible's output. We then learned how to inspect variables to ensure their values are in line with your expectations before we moved on to debugging Ansible code in detail. Furthermore, we walked through the process of inserting breakpoints into core Ansible code and executed both local and remote Python debugging sessions using standard Python tools.

In the next chapter, we will learn how to extend the functionality of Ansible...