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Ansible when variable. Create a conditional test based on the registered variable.
Ansible when variable. Mar 14, 2025 · Tired of Ansible running every task? Learn how to use when statements to control execution based on conditions, variables, and system facts. May 8, 2015 · From the ansible documentation: If a required variable has not been set, you can skip or fail using Jinja2’s defined test. I am trying to use a variable in when statement in ansible , my code snippet looks like this : - name: git repo for non prod env git: repo=http://url/repo. See how to use AND, OR, and NOT operators for multiple conditions. I want to check if the value is in {{ variable1 }} but I get an error: - name: do something when the value in variable1 command: <comm Sep 27, 2023 · The “ansible_distribution” variable is a predefined variable in Ansible that contains the name of the distribution of the target host, such as “CentOS”, “Ubuntu”, “Debian”, etc. For example: tasks: - name: Run the command if "foo" is defined ansible. Jul 23, 2025 · Conditional statements in Ansible allow tasks to run only when specific criteria are met such as variable values, file presence, or system facts. Jul 9, 2015 · @poige Undefined variable in Ansible is a tricky question because Ansible doesn't use a complete programming language. In some cases, the values of variables may depend on other variables. This ensures selective task execution, improves playbook flexibility, and supports robust automation. Learn what Ansible conditionals are with examples for when and register. With this powerful feature, you can automate tasks that would otherwise be difficult or impossible to perform. shell: echo "I've got '{{ foo }}' and am not afraid to use it!" when: foo is defined - name: Fail if "bar" is undefined ansible. Apr 8, 2016 · I have multiple tasks depend from the value of variable1. You can define these variables in your playbooks, in your inventory, in reusable Sep 16, 2024 · Learn how the when condition works in Ansible to control task execution based on variables, facts, and conditions. This play requires 'bar'" when . fail: msg="Bailing out. Optimize your playbooks with this detailed guide. Using variables Ansible uses variables to manage differences between systems. This topic covers how conditionals are used in playbooks. With Ansible, you can execute tasks and playbooks on multiple systems with a single command. You create the name of the registered variable using the register keyword. git dest=/opt/dest version Learn how to use Ansible's when clause to control the execution of your playbooks based on the value of a variable. May 27, 2022 · Often the result of a play may depend on the value of a variable, fact (something learned about the remote system), or previous task result. Create a conditional test based on the registered variable. Apr 30, 2024 · Here are several practical examples of using the when functionality in Ansible to only run the tasks when certain conditions are matched. Aug 12, 2025 · To create a conditional based on a registered variable: Register the outcome of the earlier task as a variable. To represent the variations among those different systems, you can create variables with standard YAML syntax, including lists and dictionaries. Additional groups can be created to manage hosts based on whether the hosts match other criteria. So the best you can do is set the value of the variable to an empty value or doesn't set the variable at all. builtin. obfxumztxespphaoudtjgsnfmumwsyxetuiwkahiouhrkuq