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Mastering Ansible

You're reading from   Mastering Ansible Design, develop, and solve real world automation and orchestration needs by unlocking the automation capabilities of Ansible

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Product type Paperback
Published in Nov 2015
Publisher Packt
ISBN-13 9781784395483
Length 236 pages
Edition 1st Edition
Languages
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Toc

Comparing values

Comparisons are used in many places with Ansible. Task conditionals are comparisons. Jinja2 control structures often use comparisons. Some filters use comparisons as well. To master Ansible's usage of Jinja2, it is important to understand which 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

==

Compares two objects for equality

!=

Compares two objects for inequality

>

True if the left-hand side is greater than the right-hand side

<

True if the left-hand side is less than the right- hand side

>=

True if the left-hand side is greater than or equal to the right-hand side

<=

True if the left-hand side is less than or equal to the right-hand side

Logic

Logic helps group two or more comparisons together. Each comparison is referred to as an operand:

  • and: Returns true if the left...
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