Environment_Infrastructure/ansible/roles/wireguard/tasks/main.yml

---
- name: Install WireGuard
  ansible.builtin.dnf:
    name: wireguard-tools
    state: present

- name: Ensure /etc/wireguard directory exists
  ansible.builtin.file:
    path: /etc/wireguard
    state: directory
    mode: "0700"
    owner: root
    group: root

- name: Check if WireGuard private key exists
  ansible.builtin.stat:
    path: /etc/wireguard/private.key
  register: wg_key_stat

- name: Generate WireGuard keypair
  ansible.builtin.shell: |
    wg genkey | tee /etc/wireguard/private.key | wg pubkey > /etc/wireguard/public.key
    chmod 600 /etc/wireguard/private.key
    chmod 644 /etc/wireguard/public.key
  when: not wg_key_stat.stat.exists

- name: Read WireGuard private key
  ansible.builtin.slurp:
    src: /etc/wireguard/private.key
  register: wg_private_key_raw

- name: Read WireGuard public key
  ansible.builtin.slurp:
    src: /etc/wireguard/public.key
  register: wg_public_key_raw

- name: Set WireGuard key facts
  ansible.builtin.set_fact:
    wg_server_private_key: "{{ wg_private_key_raw.content | b64decode | trim }}"
    wg_server_public_key: "{{ wg_public_key_raw.content | b64decode | trim }}"

- name: Deploy wg0.conf
  ansible.builtin.template:
    src: wg0.conf.j2
    dest: "/etc/wireguard/{{ wireguard_interface }}.conf"
    mode: "0600"
    owner: root
    group: root
  notify: restart wireguard

- name: Enable and start WireGuard
  ansible.builtin.systemd:
    name: "wg-quick@{{ wireguard_interface }}"
    enabled: true
    state: started
    daemon_reload: true

- name: Allow WireGuard UDP port from admin CIDRs
  ansible.posix.firewalld:
    rich_rule: >-
      rule family="ipv4" source address="{{ item }}"
      port port="{{ wireguard_port }}" protocol="udp" accept
    zone: drop
    state: enabled
    permanent: true
    immediate: true
  loop: "{{ admin_allowed_cidrs.split(' ') }}"

- name: Allow DB ports from WireGuard subnet only
  ansible.posix.firewalld:
    rich_rule: >-
      rule family="ipv4" source address="{{ wireguard_subnet }}"
      port port="{{ item }}" protocol="tcp" accept
    zone: drop
    state: enabled
    permanent: true
    immediate: true
  loop:
    - "{{ wireguard_db_pg_proxy_port }}"
    - "{{ wireguard_db_mongo_proxy_port }}"

- name: Print server public key (client config için gerekli)
  ansible.builtin.debug:
    msg: "WireGuard server public key: {{ wg_server_public_key }}"

- name: Enable IP forwarding (persistent)
  ansible.posix.sysctl:
    name: net.ipv4.ip_forward
    value: '1'
    sysctl_file: /etc/sysctl.d/99-wireguard.conf
    state: present
    reload: yes
  when: wireguard_enable_routing

- name: Bind WireGuard interface to drop zone permanently
  ansible.builtin.command: firewall-cmd --permanent --zone=drop --add-interface={{ wireguard_interface }}
  register: _wg_zone
  failed_when: _wg_zone.rc != 0 and 'ALREADY_ENABLED' not in _wg_zone.stderr
  changed_when: _wg_zone.rc == 0

- name: Bind routed interface to drop zone permanently
  ansible.builtin.command: firewall-cmd --permanent --zone=drop --add-interface={{ wireguard_routed_interface | default('eth1') }}
  register: _eth1_zone
  failed_when: _eth1_zone.rc != 0 and 'ALREADY_ENABLED' not in _eth1_zone.stderr
  changed_when: _eth1_zone.rc == 0
  when: wireguard_enable_routing and wireguard_routed_subnet != ""

- name: Create firewalld policy for WireGuard routing
  ansible.builtin.command: firewall-cmd --permanent --new-policy=wg-to-db
  register: _policy_create
  failed_when: _policy_create.rc != 0 and 'NAME_CONFLICT' not in _policy_create.stderr and 'already exists' not in _policy_create.stderr
  changed_when: _policy_create.rc == 0
  when: wireguard_enable_routing

- name: Set policy ingress zone
  ansible.builtin.command: firewall-cmd --permanent --policy=wg-to-db --add-ingress-zone=drop
  register: _ingress
  failed_when: _ingress.rc != 0 and 'already' not in _ingress.stderr | lower
  changed_when: _ingress.rc == 0
  when: wireguard_enable_routing

- name: Set policy egress zone
  ansible.builtin.command: firewall-cmd --permanent --policy=wg-to-db --add-egress-zone=drop
  register: _egress
  failed_when: _egress.rc != 0 and 'already' not in _egress.stderr | lower
  changed_when: _egress.rc == 0
  when: wireguard_enable_routing

- name: Add forward rule to policy (WG subnet to DB subnet only)
  ansible.builtin.command: >
    firewall-cmd --permanent --policy=wg-to-db
    --add-rich-rule='rule family="ipv4" source address="{{ wireguard_subnet }}"
    destination address="{{ wireguard_routed_subnet }}" accept'
  register: _fwd_rule
  failed_when: _fwd_rule.rc != 0 and 'already' not in _fwd_rule.stderr | lower
  changed_when: _fwd_rule.rc == 0
  when: wireguard_enable_routing and wireguard_routed_subnet != ""

- name: Enable masquerade on policy
  ansible.builtin.command: firewall-cmd --permanent --policy=wg-to-db --add-masquerade
  register: _masq
  failed_when: _masq.rc != 0 and 'already' not in _masq.stderr | lower
  changed_when: _masq.rc == 0
  when: wireguard_enable_routing

- name: Add direct firewalld rule to allow wg0 to eth1 forwarding in iptables (Docker fix)
  ansible.builtin.command: >
    firewall-cmd --permanent --direct --add-rule ipv4 filter FORWARD 0 -i {{ wireguard_interface }} -o {{ wireguard_routed_interface | default('eth1') }} -j ACCEPT
  register: _fw_dir_fwd
  failed_when: _fw_dir_fwd.rc != 0 and 'ALREADY_ENABLED' not in _fw_dir_fwd.stderr
  changed_when: _fw_dir_fwd.rc == 0
  when: wireguard_enable_routing and wireguard_routed_subnet != ""
  notify: restart wireguard

- name: Add direct firewalld rule to allow eth1 to wg0 forwarding in iptables (Docker fix)
  ansible.builtin.command: >
    firewall-cmd --permanent --direct --add-rule ipv4 filter FORWARD 0 -i {{ wireguard_routed_interface | default('eth1') }} -o {{ wireguard_interface }} -j ACCEPT
  register: _fw_dir_rev
  failed_when: _fw_dir_rev.rc != 0 and 'ALREADY_ENABLED' not in _fw_dir_rev.stderr
  changed_when: _fw_dir_rev.rc == 0
  when: wireguard_enable_routing and wireguard_routed_subnet != ""
  notify: restart wireguard

- name: Reload firewalld to activate routing policy
  ansible.builtin.command: firewall-cmd --reload
  changed_when: false
  when: wireguard_enable_routing