- name: Get known_hosts facts
  generate_all_known_hosts:
    hostvars: "{{ hostvars }}"

- name: add known_host record for every public key of every other ip, hostname for ansible_user
  known_hosts:
    name: "{{ item.name }}"
    key: "{{ item.key }}"
  with_items: "{{ ansible_facts.all_known_hosts }}"

- name: add default known_host record for every user
  become: true
  known_hosts:
    name: "{{ item.name }}"
    key: "{{ item.key }}"
    path: /etc/ssh/ssh_known_hosts
  with_items: "{{ ansible_facts.all_known_hosts }}"