Book Image

Mastering Ansible, Second Edition - Second Edition

By : Jesse Keating
Book Image

Mastering Ansible, Second Edition - Second Edition

By: Jesse Keating

Overview of this book

This book provides you with the knowledge you need to understand how Ansible 2.1 works at a fundamental level and leverage its advanced capabilities. You'll learn how to encrypt Ansible content at rest and decrypt data at runtime. You will master the advanced features and capabilities required to tackle the complex automation challenges of today and beyond. You will gain detailed knowledge of Ansible workflows, explore use cases for advanced features, craft well thought out orchestrations, troubleshoot unexpected behaviour, and extend Ansible through customizations. Finally, you will discover the methods used to examine and debug Ansible operations, helping you to understand and resolve issues. By the end of the book, the readers will be able to unlock the true power of the Ansible automation engine and will tackle complex real world actions with ease.
Table of Contents (16 chapters)
Mastering Ansible - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Roles


With a functional understanding of the inclusion of variables, tasks, handlers, and playbooks, we can move on to the more advanced topic of Roles. Roles move beyond the basic structure of a few playbooks and a few broken out files to reference. Roles provide a framework for fully independent, or interdependent, collections of variables, tasks, files, templates, and modules. Each role is typically limited to a particular theme or desired end result, with all the necessary steps to reach that result either within the role itself or in other roles listed as dependencies. Roles themselves are not playbooks. There is no way to directly execute a role. Roles have no setting for which host the role will apply to. Top-level playbooks are the glue that binds the hosts from your inventory to roles that should be applied to those hosts.

Role structure

Roles have a structured layout on the file system. This structure exists to provide automation around including tasks, handlers, variables, modules...