---
- name: Rollback VMs to initial state
  uri:
    url             : "{{ __pve_endpoint }}/nodes/{{ item.vm_host | default(__pve_node) }}/qemu/{{ item.vmid }}/snapshot/{{ __lab_snapshot_name }}/rollback"
    method          : POST
    headers         :
      Content-type  : "application/x-www-form-urlencoded"
      Authorization : "{{ __pve_token }}"
    body_format     : form-urlencoded
    body:
      node          : "{{ item.vm_host | default(__pve_node) }}"
      vmid          : "{{ item.vmid }}"
      snapname      : "{{ __lab_snapshot_name }}"
    return_content  : no
    validate_certs  : no
  register          : r_rollback_vms
  loop              : "{{ lab_nodes }}"
  loop_control      :
    label           : "[{{ item.vmid }}] {{ item.name }}"


- name: Wait for rollback completion...
  uri:
    url             : "{{ __pve_endpoint }}/nodes/{{ item.vm_host | default(__pve_node) }}/qemu/\
                      {{ item.vmid }}/status/current"
    method          : GET
    headers         :
      Content-type  : "application/x-www-form-urlencoded"
      Authorization : "{{ __pve_token }}"
      vmid          : "{{ item.vmid }}"
    return_content  : no
    validate_certs  : no
  register          : r_wait_for_rollback
  loop              : "{{ lab_nodes }}"
  loop_control      :
    label           : "{{ item.name }}"
  until             : r_wait_for_rollback.status == 200 and r_wait_for_rollback.json.data.status is defined
  retries           : "{{ __api_retries }}"
  delay             : "{{ __api_polling }}"


...