ansible_proxmox_WOL/tasks/main.yml

---
# ============================================================
# Install required packages
# ============================================================
- name: Install required packages
  ansible.builtin.apt:
    name: ethtool
    state: present
    update_cache: true

# ============================================================
# Detect physical NICs with WOL support using Ansible facts
# ============================================================
- name: Gather network interface facts
  ansible.builtin.setup:
    gather_subset:
      - network
  when: ansible_facts.interfaces is not defined

- name: Display interfaces
  ansible.builtin.debug:
    msg: >
      {{ ansible_facts.interfaces }}

# - name: Get interfaces starting with "en" or "eth"
#   ansible.builtin.set_fact:
#     en_interfaces: "{{ ansible_facts.interfaces | select('match', '^eth|^ens|^enp') | unique | list }}"

- name: Get interfaces starting with "en, "eth" or "nic"
  ansible.builtin.set_fact:
    en_interfaces: >-
      {{
        ansible_facts.interfaces
        | select('match', '^(eth|en|nic)')
        | list
      }}

- name: Display debug selected interfaces
  ansible.builtin.debug:
    msg: >
      {{ en_interfaces }}

- name: Check supported Wake-on-LAN modes
  ansible.builtin.shell: |
    set -o pipefail
    ethtool {{ item }} | grep 'Supports Wake-on' | tail -1 | awk '{print $3}'
  args:
    executable: /bin/bash
  changed_when: false
  loop: "{{ en_interfaces }}"
  register: wol_supported
  when: en_interfaces | length > 0

- name: WOL | Check if enabled
  ansible.builtin.shell: |
    set -o pipefail
    ethtool {{ item }} | grep 'Wake-on' | tail -1 | awk '{print substr($0,length,1)}'
  args:
    executable: /bin/bash
  changed_when: false
  failed_when: false
  loop: "{{ en_interfaces }}"
  register: wol_enabled
  when: en_interfaces | length > 0

- name: "Set Wake-on-LAN to {{ wol_mode }}"
  ansible.builtin.command: "ethtool -s {{ item.0 }} wol {{ wol_mode }}"
  loop: "{{ en_interfaces | zip(wol_enabled.results, wol_supported.results) | list }}"
  loop_control:
    label: "{{ item.0 }}"
  when:
    - wol_mode not in item.1.stdout
    - wol_mode in item.2.stdout
  changed_when: true

- name: "Disable Wake-on-LAN"
  ansible.builtin.command: "ethtool -s {{ item.0 }} wol {{ wol_mode }}"
  loop: "{{ en_interfaces | zip(wol_enabled.results, wol_supported.results) | list }}"
  loop_control:
    label: "{{ item.0 }}"
  when:
    - wol_mode == 'd'
    - wol_mode not in item.1.stdout
  changed_when: true

- name: Deploy wol systemd template
  ansible.builtin.template:
    src: templates/wol@.service.j2
    dest: /etc/systemd/system/wol@.service
    mode: '0644'
  notify: Reload systemd
  when: en_interfaces | length > 0

- name: Enable WOL systemd unit for each interface
  ansible.builtin.systemd:
    name: "wol@{{ item }}.service"
    enabled: true
    state: started
  loop: "{{ en_interfaces }}"
  when: en_interfaces | length > 0

- name: Get MAC addresses
  ansible.builtin.set_fact:
    wol_mac_addresses: >-
      {{ wol_mac_addresses | default([]) + [ hostvars[inventory_hostname]['ansible_' ~ item].macaddress ] }}
  loop: "{{ en_interfaces }}"
  when: en_interfaces | length > 0

- name: Report WOL configuration
  ansible.builtin.debug:
    msg: |
      Wake-on-LAN Configuration Summary:
      ===================================
      Physical Interfaces: {{ en_interfaces | join(', ') }}
      WOL Mode: {{ wol_mode }}
      MAC Addresses: {{ wol_mac_addresses | join(', ') }}

- name: Start tcpdump to capture WOL packet
  become: true
  ansible.builtin.shell: |
    timeout 10 tcpdump -i {{ en_interfaces[0] }} -nn -c 1 \
    'udp and port {{ wol_port }} and (udp[8:4] = 0xffffffff)'
  register: tcpdump_result
  async: 12
  poll: 0

- name: Send Wake-on-LAN packet from localhost
  community.general.wakeonlan:
    mac: "{{ wol_mac_addresses[0] }}"
    port: "{{ wol_port }}"
    broadcast: 255.255.255.255
  delegate_to: localhost

- name: Wait for tcpdump to finish
  ansible.builtin.async_status:
    jid: "{{ tcpdump_result.ansible_job_id }}"
  register: tcpdump_status
  until: tcpdump_status.finished
  retries: 12
  delay: 1

- name: Check if WOL packet was received
  ansible.builtin.assert:
    that:
      - tcpdump_status.rc == 0
    success_msg: "✅ Wake-on-LAN magic packet received by host"
    fail_msg: "❌ Wake-on-LAN magic packet NOT detected"