Conditionals in Ansible, examples

gistfile1.txt

---
- hosts: test
  tasks:
 
  - name: Check OS family
    debug: msg="This is my OS"
    when: ansible_os_family == "Debian"
 
  - name: Check if Apache2 is installed
    command: dpkg-query -W apache2
    register: apache2_check
 
  - name: Print message if apache installed
    debug: msg="Apache2 is installed on remote host"
    when: "'apache2' in apache2_check.stdout"
 
  - name: Check if admin logged
    command: who
    register: who_check
 
  - name: Print message if user admin not logged
    debug: msg="User admin is not logged on remote host"
    when: not 'admin' in who_check.stdout