Ansible Filter default

Internal

• Ansible Filters
• Ansible Concepts | Undefined Variables

Overview

The filter provides a default value in case an undefined variable.

- name: Debug
  debug:
    msg: "value of {{ color | default('blue') }}"

In case a variable evaluates to false or to an empty string, and we want to provide a default value in this situation, default() filter needs a second parameter with the value true:

- name: Debug
  debug:
    msg: "{{ lookup('env', 'MY_USER') | default('admin', true) }}"

Also see:

• Making variables optional with omit.

Playground

https://github.com/ovidiuf/playground/blob/master/ansible/filters/default-value-for-variable/playbook.yaml