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

Review questions


Do you think you've understood the chapter well enough? Try answering the following questions to test your understanding:

  1. How are Jinja2 templates different from static files?

  2. What are facts? How are they discovered?

  3. What is the difference between {{ }} and {% %} in the context of Jinja2 templates?

  4. Can you use a variable anywhere apart from templates? If yes, where?

  5. If you define a variable foo in the vars directory in a role and the same variable in the hosts_var file, which of these will take precedence?

  6. How do you write Ansible roles that are supported on multiple platforms?

  7. Where can you specify the author and licensing information in a role?

  8. How do you provide variables while launching an Ansible-playbook command?

  9. Which command would you use to create a directory structure required by the roles automatically?

  10. How do you override a variable specified in the vars directory of a role?