Book Image

Ansible Playbook Essentials

By : Gourav Shah, GOURAV JAWAHAR SHAH
Book Image

Ansible Playbook Essentials

By: Gourav Shah, GOURAV JAWAHAR SHAH

Overview of this book

Ansible Playbook Essentials will show you how to write a blueprint of your infrastructure, encompassing multitier applications using Ansible's playbooks. Beginning with basic concepts such as plays, tasks, handlers, inventory, and YAML Ain't Markup Language (YAML) syntax that Ansible uses, you'll understand how to organize your code into a modular structure. Building on this, you will study techniques to create data-driven playbooks with variables, templates, logical constructs, and encrypted data, which will further strengthen your application skills in Ansible. Adding to this, the book will also take you through advanced clustering concepts, such as discovering topology information about other nodes in the cluster and managing multiple environments with isolated configurations. As you approach the concluding chapters, you can expect to learn about orchestrating infrastructure and deploying applications in a coordinated manner. By the end of this book, you will be able to design solutions to your automation and orchestration problems using playbooks quickly and efficiently.
Table of Contents (20 chapters)
Ansible Playbook Essentials
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Setting Up the Learning Environment
References
Index

Summary


We started this chapter by discussing what orchestration is, what different orchestration scenarios are, and how Ansible can fit in. You learned about Ansible's set of rich features in the context or orchestration. This includes multi-playbook support, pre-tasks and post-tasks, tags and limits, running tests, and a lot more. We went on to tag the roles we created earlier and learned how to control what portion of code runs on which machines using a combination of tags, patterns, and limits. Finally, we created a new playbook to orchestrate the workflow to update web servers, which involves zero-downtime deployment, delegation, pre-tasks and post-tasks, and tests. You also learned that Ansible can be a good fit in any orchestration scenario.

This brings us to the end of this book. Before we conclude, on behalf of the reviewers, editors, contributors, and rest of the publishing team, I would like to thank you for considering this book as a companion in your journey towards being an...