homelab/roles/wireguard/tasks/main.yml

---
- name: Install wireguard and iptables
  become: true
  ansible.builtin.apt:
    pkg:
      - wireguard
      - iptables
- name: Create wireguard directory
  become: true
  ansible.builtin.file:
    path: /etc/wireguard
    state: directory
    mode: '1700'
    owner: root
- name: Generate private key
  become: true
  ansible.builtin.shell: |
    umask 077
    wg genkey > private_key
  args:
    chdir: /etc/wireguard
    creates: private_key
- name: Generate public key
  become: true
  ansible.builtin.shell: |
    umask 077
    cat private_key | wg pubkey > public_key
  args:
    chdir: /etc/wireguard
    creates: public_key
- name: Enable packet forwarding
  become: true
  ansible.posix.sysctl:
    name: net.ipv4.ip_forward
    value: '1'
    state: present
    reload: true
- name: Read private key
  become: true
  ansible.builtin.slurp:
    path: /etc/wireguard/private_key
  register: private_key
- name: Copy wireguard config
  become: true
  ansible.builtin.template:
    src: wg0.conf.j2
    dest: /etc/wireguard/wg0.conf
  register: cfg
- name: Enable wireguard service
  become: true
  ansible.builtin.systemd_service:
    name: wg-quick@wg0
    state: "{% if cfg.changed %}restarted{% else %}started{% endif %}"
    enabled: true