Chapter 3. Unlocking the Power of Jinja2 Templates

Templating is the lifeblood of Ansible. From configuration file content to variable substitution in tasks, to conditional statements and beyond, templating comes into play with nearly every Ansible facet. The templating engine of Ansible is Jinja2, a modern and designer-friendly templating language for Python. This chapter will cover a few advanced features of Jinja2 templating:

  • Control structures
  • Data manipulation
  • Comparisons

Control structures

In Jinja2, a control structure refers to things in a template that controls the flow of the engine parsing the template. These structures include, but are not limited to, conditionals, loops, and macros. Within Jinja2 (assuming the defaults are in use), a control ...

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