---
- name: Create inventory based on passed extra_vars
  hosts: localhost
  gather_facts: no
  become: no


  vars_files:
    - vars/defaults.yml


  vars:
    lab_tower_hosts:
      - lab-dev-1
      - lab-dev-2
      - lab-prod-1
      - lab-prod-2
    provision_host : "{{ tower_provision_host | default(lab_tower_hosts | random) }}"


  tasks:
    - name: "Create in-memory inventory for {{ provision_host }}"
      add_host:
        name: "{{ provision_host }}"
        groups:
          - remdiation


# =========================================================================== #


- name: Create a test file on remediation group
  hosts: remdiation
  gather_facts: no
  become: no


  vars_files:
    - vars/defaults.yml


  tasks:
    - name: "Test #1 - Copy file to machine"
      copy:
        src  : files/hello-ansible.txt
        dest : "{{ check_file }}"


...