ansible-on-prem/roles/docker/swarm/node/tasks/main.yml

---
- name: Set node labels on all Swarm nodes
  community.docker.docker_node:
    hostname: "{{ item.name }}"
    labels: "{{ item.labels }}"
    labels_state: replace
  loop: "{{ swarm_nodes }}"
  when: "'swarm_manager' in hostvars[inventory_hostname]['vm_roles']"