What are Ansible roles and how do variables work in them?

What are Ansible roles and how do variables work in them?

Ansible roles are a way to organize playbooks and related files into reusable components. Variables in roles allow you to customize the behavior of these roles.

Can you give me an example of how to define variables in a role?

Sure! You can define variables in a role by creating a vars/main.yml file within the role directory. For example:

# roles/my_role/vars/main.yml
my_variable: 'Hello, World!'

How do I use these variables in my playbook?

You can use the variable in your playbook like this:

- hosts: all
  roles:
    - my_role
  tasks:
    - debug:
        msg: '{{ my_variable }}'

What if I want to override a variable when I run the playbook?

You can override a variable by using the -e flag when running your playbook. For example:

ansible-playbook my_playbook.yml -e 'my_variable=New Value'