ansible/playbooks/sync_all_test.yaml

---
- name: import a task
  hosts: containers
  gather_facts: false
  vars:
    listjojocomma: "{{ selected_containers | split(',') }}"
  tasks:
    - debug:
        msg: "{{ listjojocomma }}"
    - debug:
        msg: "{{ item }}"
      loop: "{{ listjojocomma }}"
    
    - debug:
        msg: "{{ item }}"
      loop: "{{ selected_host }}"