boma/roles/base/tasks/fail2ban.yml

---
- name: Install fail2ban
  ansible.builtin.apt:
    name: fail2ban
    state: present
    update_cache: true

- name: Configure the sshd jail
  ansible.builtin.template:
    src: fail2ban_sshd.local.j2
    dest: /etc/fail2ban/jail.d/sshd.local
    owner: root
    group: root
    mode: "0644"
  notify: restart fail2ban

- name: Enable and start fail2ban
  ansible.builtin.service:
    name: fail2ban
    enabled: true
    state: started
  # In --check on a host without fail2ban yet, the package isn't really installed, so the
  # service lookup fails. Skip the start in check mode (the install + jail are still
  # previewed); a real deploy installs then starts it.
  when: not ansible_check_mode