Ansible jinja variable conditional. yml ├── hapoxy ├── java ├── myplaybook.

Ansible jinja variable conditional You should hence write a regular jinja expression, within which it is not natural to use Jinja delimiters. You can use templating with the template module. You can prepare a separate . yml file with a play that sets up the variables you need using when clauses, and then importing (or including) them in your main playbook. As Ansible playbooks are written in YAML, which is very static, Ansible uses Jinja2 to inject logic, variables and control structures into YAML for flexible, customized automation. Let’s add SSL configuration to nginx. May 16, 2022 · My scenario is to pass only one of the variable to an Ansible template file, so in Jinja. Nov 10, 2024 · With Ansible Jinja2 templating, you can also add conditional logic to adjust configurations based on specific requirements. yml ├── hapoxy ├── java ├── myplaybook. On any host where the test passes (returns a value of True), Ansible runs that task. Basic Syntax of Jinja2 Conditionals # Jinja2 provides a straightforward syntax for writing conditional statements, similar to Python. Jul 9, 2015 · I want to conditionally define a variable in an Ansible playbook like this: my_var: "{{ 'foo' if my_condition}}" I would like the variable to remain undefined if the condition does not resolve to Nov 24, 2021 · I have multiple roles as follows : haproxy, java, nginx, tomcat ├── ansible-test-host. At the moment Ansible ships the file to the server, the Jinja template will be interpreted Here, you are testing the existence of a directory, but do you really want this to be tested at the moment Ansible ships the bash script to the remote server? Nov 11, 2025 · Templating (Jinja2) Ansible uses Jinja2 templating to enable dynamic expressions and access to variables and facts. When you run the task or playbook, Ansible evaluates the test for all hosts. Mar 22, 2024 · To quote the Ansible docs: "The when clause is a raw Jinja2 expression without double curly braces". Here's the logic that I want to a Mar 12, 2025 · Learn how to use Ansible conditionals to improve automation workflows. Ansible’s approach to configuration – separating variables from tasks, keeps your playbooks from turning into arbitrary code with ugly nested ifs, conditionals, and so on - and results in more streamlined & auditable configuration rules – especially because there are a minimum of decision points to track. These conditions are typically defined using variables within the playbook itself or external to it. This guide covers "when" statements, multiple conditions, Ansible facts, registered variables, and Jinja2 templates for more flexible and efficient playbooks. j2 based on a variable. Dec 27, 2023 · It implements a straightforward template syntax including variables, loops, conditionals like if statements, inheritance and more. yml ├── nginx └── tomcat Base playbook is : myplaybook. conf. The logic should be: if variable_a is passed assign var_a and ignore var_b else assign var_b. Feb 2, 2021 · 1 You are mixing concepts here. Apr 11, 2018 · ansible allows Jinja2 loops and conditionals in templates, but in playbooks, we do not use them. The when clause is a raw Jinja2 expression without double curly braces (see Referencing simple variables). This article explains how to correctly implement conditional expressions using the ternary filter in Ansible and avoid common syntax mistakes that lead to frustrating template errors. I would like to understand why was the ternary filter created and why is it preferred (Ansible docs doesn’t even mention the alternative syntax) over the more pythonic way of using python style conditional expressions supported by the Jinja library. . Mar 12, 2025 · Learn how to use Ansible conditionals to improve automation workflows. Jun 4, 2015 · I'm using Ansible with Jinja2 templates, and this is a scenario that I can't find a solution for in Ansible's documentation or googling around for Jinja2 examples. Ansible can ship a file to a remote server. Aug 18, 2025 · Jinja2 is a templating engine used by Ansible to create dynamic content. Aug 6, 2024 · What are Conditional Playbooks? Conditional playbooks are Ansible playbooks that contain tasks that execute based on certain conditions being met. It allows you to embed variables, apply filters, and use loops/conditions inside configuration files. Conditionals in Jinja2 are enclosed within {% %} tags and can be used to control the flow of template rendering based on variable values. 1 day ago · Create the task, then add a when statement that applies a test. yml and looks like Mar 6, 2020 · Here is my variable file ` layers: name: APP things: cactus lotus jasmine rose name: WAS things: mango apple ` Below is my jinja template file: ` {% for layer in layers %} {% for item … Oct 29, 2018 · how to use if elif and else jinja condition in same statement in ansible Asked 6 years, 11 months ago Modified 4 years, 8 months ago Viewed 44k times Ansible Ternary Operator in Jinja2 Templates Ansible users often encounter errors when trying to use ternary operators in Jinja2 templates. Apr 11, 2018 · As you probably know, it’s not a standard Jinja filter but one created in Ansible code. zgdr udsy emng larkmnr gydzz rtzhz wgu wyivsm dove adpxy ywyw cfbb jupkc eos gzbq