Example is_atomic

is_atomic.yml

---
- set_fact:
      is_atomic: False

- name: Checking for Atomic model
    stat:
      path: /run/ostree-booted
    register: ostree_booted
    ignore_errors: True

- name: Update is_atomic if using the Atomic model
    set_fact:
      is_atomic: "{{ ostree_booted.stat.exists }}"
    when: ostree_booted.stat.exists is defined

- debug: msg="is_atomic={{ is_atomic }}"