Ansible Roles variables that differ between OS

Using Ansible roles you may wish to set the package and service name per OS. Within roles we can import them within tasks from the appropriate vars.

tasks/main.yml

- name: Obtain OS Specific Variables
  include_vars: "{{ item }}"
  with_first_found:
    - "../vars/{{ ansible_distribution }}-{{ ansible_distribution_version }}.yml"
    - "../vars/{{ ansible_distribution }}.yml"
    - "../vars/{{ ansible_os_family }}.yml"
    - "../vars/defaults.yml"

Then you can set values within /vars as appropriate e.g. Apache

vars/default.yml

apache_package_name: apache2
apache_service_name: apache2

/vars/RedHat.yml

apache_package_name: httpd
apache_service_name: httpd

/vars/Debian.yml

apache_package_name: apache2
apache_service_name: apache2