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Ansible Variable Precedence

Home » Network Automation » Ansible

Ansible Variable Precedence Order

Ansible variable precedence, sometimes also referred to as variable priority or hierarchy, determines which value will be assigned to a variable when that variable is defined in multiple places. The general principle is that the more specific declarations will override the more general ones.

https://docs.ansible.com/ansible/latest/reference_appendices/general_precedence.html

What is the order of precedence for Ansible variables?

1. Extra vars (from command-line) always win.
2. Task vars (only for the specific task).
3. Block vars (only for the tasks within the block).
4. Role and include vars.
5. Vars created with set_fact.
6. Vars created with the register task directive.
7. Play vars_files.
8. Play vars_prompt.
9. Play vars.
10. Host facts.
11. Playbook host_vars.
12. Playbook group_vars.
13. Inventory host_vars.
14. Inventory group_vars.
15. Inventory vars.
16. Role defaults.

What is the highest variable precedence in Ansible?

Ansible documentation states that the command line has the highest precedence this will override any variable defined anywhere else.

Ansible Precedence Rules

Ansible variable precedence rules

Ansible variable priority

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