Meaning of Variable Name Starting With "__"?

Archives Ansible Project
1

I’m about to use geerlingguy.apache and saw this code in the main.yml task:

`

  • name: Define apache_packages.
    set_fact:
    apache_packages: “{{ __apache_packages | list }}”
    when: apache_packages is not defined
    `

What does this double underscore mean? __apache_packages

I know that double underscores usually indicate a private variable in some languages. Is that the meaning in Ansible/YAML?

2

I'm about to use geerlingguy.apache and saw this code in the main.yml task:

- name: Define apache_packages.
  set_fact:
    apache_packages: "{{ __apache_packages | list }}"
  when: apache_packages is not defined

What does this double underscore mean? __apache_packages

For Ansible nothing other than that underscore is just a valid character for a variable.

I know that double underscores usually indicate a private variable in some
languages. Is that the meaning in Ansible/YAML?

You would need to ask the author of the role.