---
- name: Collect all users and groups allowed to login via ssh
  set_fact:
    sshd_allow_users:  '{{ ["root"] + users.keys() | default({}) | sort }}'
    sshd_allow_groups: '{{ ["root"] + users.keys() | default({}) | sort }}'


- name: Copy sshd configuration
  template:
    src: sshd_config
    dest: '/etc/ssh/sshd_config'
    owner: root
    group: root
    mode: 'u=rw,g=r,o=r'
    validate: /usr/sbin/sshd -t -f %s
  notify:
    - restart ssh


- name: Generate new ed25519 ssh host key pair if necessary
  command: ssh-keygen -t ed25519 -f 'ssh_host_ed25519_key' -P '' -q
  args:
    chdir: '/etc/ssh/'
    creates: 'ssh_host_ed25519_key.pub'
  notify:
    - restart ssh


- name: Remove unwanted host keys
  file:
    path: '/etc/ssh/ssh_host_{{ item }}_key'
    state: absent
  with_items:
    - ecdsa
    - rsa
    - dsa
  notify:
    - restart ssh
- file:
    path: '/etc/ssh/ssh_host_{{ item }}_key.pub'
    state: absent
  with_items:
    - ecdsa
    - rsa
    - dsa
  notify:
    - restart ssh