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Mastering Ansible

You're reading from   Mastering Ansible Effectively automate configuration management and deployment challenges with Ansible 2.7

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Product type Paperback
Published in Mar 2019
Publisher Packt
ISBN-13 9781789951547
Length 412 pages
Edition 3rd Edition
Tools
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Authors (2):
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Jesse Keating Jesse Keating
Author Profile Icon Jesse Keating
Jesse Keating
James Freeman James Freeman
Author Profile Icon James Freeman
James Freeman
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Toc

Table of Contents (17) Chapters Close

Preface 1. Section 1: Ansible Overview and Fundamentals
2. The System Architecture and Design of Ansible FREE CHAPTER 3. Protecting Your Secrets with Ansible 4. Ansible and Windows - Not Just for Linux 5. Infrastructure Management for Enterprises with AWX 6. Section 2: Writing and Troubleshooting Ansible Playbooks
7. Unlocking the Power of Jinja2 Templates 8. Controlling Task Conditions 9. Composing Reusable Ansible Content with Roles 10. Troubleshooting Ansible 11. Extending Ansible 12. Section 3: Orchestration with Ansible
13. Minimizing Downtime with Rolling Deployments 14. Infrastructure Provisioning 15. Network Automation 16. Other Books You May Enjoy

Comparing values

Comparisons are used in many places with Ansible. Task conditionals are comparisons. Jinja2 control structures such as if/elif/else blocks, for loops, and macros often use comparisons; some filters use comparisons as well. To master Ansible's usage of Jinja2, it is important to understand what comparisons are available.

Comparisons

Like most languages, Jinja2 comes equipped with the standard set of comparison expressions you would expect, which will render a Boolean true or false.

The expressions in Jinja2 are as follows:

Expression Definition
== True if two objects are equal
!= True if two objects are not equal
> True if the left-hand side is greater than the right-hand side
< True if...
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