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Practical Ansible 2

You're reading from   Practical Ansible 2 Automate infrastructure, manage configuration, and deploy applications with Ansible 2.9

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781789807462
Length 410 pages
Edition 1st Edition
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Authors (4):
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Fabio Alessandro Locati Fabio Alessandro Locati
Author Profile Icon Fabio Alessandro Locati
Fabio Alessandro Locati
James Freeman James Freeman
Author Profile Icon James Freeman
James Freeman
Daniel Oh Daniel Oh
Author Profile Icon Daniel Oh
Daniel Oh
Oh Se Young Oh Se Young
Author Profile Icon Oh Se Young
Oh Se Young
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Table of Contents (18) Chapters Close

Preface 1. Section 1: Learning the Fundamentals of Ansible
2. Getting Started with Ansible FREE CHAPTER 3. Understanding the Fundamentals of Ansible 4. Defining Your Inventory 5. Playbooks and Roles 6. Section 2: Expanding the Capabilities of Ansible
7. Consuming and Creating Modules 8. Consuming and Creating Plugins 9. Coding Best Practices 10. Advanced Ansible Topics 11. Section 3: Using Ansible in an Enterprise
12. Network Automation with Ansible 13. Container and Cloud Management 14. Troubleshooting and Testing Strategies 15. Getting Started with Ansible Tower 16. Assessments 17. Other Books You May Enjoy

The proper approach to defining group and host variables

When working with group and host variables, you can split them up using the directory-based approach we used in the The preferred directory layout section. However, there are a few additional pointers to managing this that you should be aware of. First and foremost, you should always pay attention to variable precedence. A detailed list of variable precedence order can be found at https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable. However, the key takeaways for working with multiple environments are as follows:

  • Host variables are always of a higher order of precedence than group variables; so, you can override any group variable with a host variable. This behavior is useful if you take advantage of it in a controlled manner, but can yield unexpected...
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