ansible-role-root_user/tasks/ssh.yml

---

- name: ssh key
  user:
    name: root
    generate_ssh_key: yes
    ssh_key_type: ed25519
  when: root_ssh_key

- name: ssh authorized keys
  template:
    src: ssh_authorized_keys.j2
    dest: /root/.ssh/authorized_keys
  when: root_ssh_authorized_keys is defined