database_setup.yml

---
- name: Database Setup play
  hosts: database_servers
  vars:
   min_ram_size_bytes: 2000000000
   supported_distros:
    - RedHat
    #- Centos
  tasks:
     - name: Setup Database tasks on supported hosts w/ Min. RAM
       include_tasks: "{{ ansible_distribution }}_database_tasks.yml"
       when:
        - ansible_distribution in supported_distros
        - ansible_memtotal_mb*1024*1024 >= min_ram_size_bytes
     - name: Print a message for unsupported Distros
       debug:
        msg: >
         {{ inventory_hostname }} is a
         {{ ansible_distribution }}-based host, which is not one
         of the supported distributions ({{ supported_distros }})
       when: ansible_distribution not in supported_distros
     - name: Print a message for systems with insufficient RAM
       debug:
        msg: >
         {{ inventory_hostname }} does not meet the minimum
         RAM requirements of {{ min_ram_size_bytes }} bytes.
       when: ansible_memtotal_mb*1024*1024 < min_ram_size_bytes