---
- name: 'Install SSH keys as known hosts'
  hosts: 'all'
  serial: 1
  gather_facts: false

  tasks:
    - name: 'Register host key'
      delegate_to: 'localhost'
      throttle: 1
      when: 'ssh_ed25519'
      ansible.builtin.known_hosts:
        name: '{{ inventory_hostname }}'
        key: '{{ inventory_hostname }} ssh-ed25519 {{ ssh_ed25519 }}'