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

- name: Validate WOL capability using ethtool for detected interfaces
  ansible.builtin.command: "ethtool {{ item }}"
  register: wol_capabilities_check
  changed_when: false
  failed_when: false
  loop: "{{ en_interfaces }}"
  when: en_interfaces | length > 0

- name: Display ethtool output for detected interfaces
  ansible.builtin.debug:
    msg: >
      {{ wol_capabilities_check.results | map(attribute='stdout_lines') | list }}

# # ============================================================
# # Map bridges to physical NICs using Ansible facts
# # ============================================================
# - name: Get bridge link information
#   ansible.builtin.command: "bridge link show"
#   register: bridge_links
#   changed_when: false
#   check_mode: false

# - name: Initialize detected interfaces dictionary
#   ansible.builtin.set_fact:
#     wol_detected_interfaces: {}

# - name: Detect physical NIC for each bridge
#   ansible.builtin.set_fact:
#     wol_detected_interfaces: >-
#       {{
#         wol_detected_interfaces | combine({
#           item: (
#             bridge_links.stdout_lines
#             | select('search', 'master ' ~ item)
#             | map('regex_replace', '^\\d+: ([a-z0-9@.]+):.*$', '\\1')
#             | reject('search', '^(veth|tap|fw)')
#             | reject('search', '^\\d+:')
#             | select('in', wol_supported_interfaces)
#             | first | default('')
#           )
#         })
#       }}
#   loop: "{{ wol_bridges_list }}"
#   loop_control:
#     label: "{{ item }}"

# - name: Check for bond0 backing
#   when: bond_info.rc == 0
#   block:
#     - name: Detect if any bridge is backed by bond0
#       ansible.builtin.set_fact:
#         wol_has_bond0: "{{ wol_detected_interfaces.values() | select('search', 'bond0') | length > 0 }}"

#     - name: Extract bond0 slaves if present
#       ansible.builtin.set_fact:
#         wol_bond0_slaves: >-
#           {{
#             (bond_info.stdout | regex_findall('Slave Interface: ([a-zA-Z0-9]+)')) | list
#           }}
#       when: wol_has_bond0 | default(false)

# # ============================================================
# # Validate configuration and resolve to physical NICs
# # ============================================================
# - name: Fail if any bridge backing NIC could not be detected
#   ansible.builtin.fail:
#     msg: >
#       Unable to detect physical NIC backing bridge(s): {{ unresolved_bridges | join(', ') }}.
#       Please verify bridges exist and are backed by WOL-capable interfaces.
#       Available WOL-capable interfaces: {{ wol_supported_interfaces | join(', ') }}
#   vars:
#     unresolved_bridges: "{{ wol_detected_interfaces | dict2items | selectattr('value', 'equalto', '') | map(attribute='key') | list }}"
#   when: unresolved_bridges | length > 0

# - name: Build final WOL interfaces list (deduped physical NICs)
#   ansible.builtin.set_fact:
#     wol_final_interfaces: "{{ wol_detected_interfaces.values() | unique | list }}"

# # ============================================================
# # Check current WOL status to ensure idempotency
# # ============================================================
# - name: Get current WOL status
#   ansible.builtin.command: "ethtool {{ item }}"
#   register: wol_current_status
#   changed_when: false
#   failed_when: false
#   loop: "{{ wol_final_interfaces }}"
#   loop_control:
#     label: "{{ item }}"

# - name: Build list of NICs needing WOL enabled
#   ansible.builtin.set_fact:
#     wol_needs_enable: >-
#       {{
#         wol_current_status.results
#         | selectattr('stdout', 'search', 'Wake-on: [^g]')
#         | map(attribute='item')
#         | list
#       }}

# # ============================================================
# # Enable WOL immediately (only if needed)
# # ============================================================
# - name: Enable Wake-on-LAN immediately on NICs
#   ansible.builtin.command: "ethtool -s {{ item }} wol {{ wol_mode }}"
#   register: wol_enable_result
#   changed_when: true
#   loop: "{{ wol_needs_enable }}"
#   loop_control:
#     label: "{{ item }}"
#   when: wol_needs_enable | length > 0

# # ============================================================
# # Persist WOL via udev rules (safe and idempotent)
# # ============================================================
# - name: Create udev rule content
#   ansible.builtin.set_fact:
#     wol_udev_rules: >-
#       {{
#         wol_final_interfaces
#         | map('regex_replace', '^(.+)$', 'ACTION=="add", SUBSYSTEM=="net", KERNEL=="\1", RUN+="/sbin/ethtool -s \1 wol {{ wol_mode }}"')
#         | list
#       }}

# - name: Create/Update udev rules file
#   ansible.builtin.copy:
#     dest: /etc/udev/rules.d/90-wol.rules
#     owner: root
#     group: root
#     mode: "0644"
#     content: |
#       # Wake-on-LAN udev rules - Auto-generated by Ansible
#       # Applies to: {{ wol_final_interfaces | join(', ') }}
#       {% for rule in wol_udev_rules %}
#       {{ rule }}
#       {% endfor %}
#     notify:
#       - Reload_udev_rules
#       - Trigger_udev_net

# # ============================================================
# # Verification & Reporting
# # ============================================================
# - name: Verify Wake-on-LAN status
#   ansible.builtin.command: "ethtool {{ item }}"
#   register: wol_status
#   changed_when: false
#   loop: "{{ wol_final_interfaces }}"
#   loop_control:
#     label: "{{ item }}"
#   when: wol_verify

# - name: Display WOL status per interface
#   ansible.builtin.debug:
#     msg: >
#       Interface {{ item.item }} WOL Status:
#       {{ item.stdout_lines | select('search', 'Wake-on:') | first | default('Status Unknown') }}
#   loop: "{{ wol_status.results | default([]) }}"
#   loop_control:
#     label: "{{ item.item }}"
#   when: wol_verify

# - name: Get MAC addresses for all interfaces
#   ansible.builtin.set_fact:
#     wol_mac_addresses: >-
#       {{
#         wol_final_interfaces
#         | map('extract', hostvars[inventory_hostname]['ansible_' ~ item] | default({}), 'macaddress')
#         | list
#       }}

# - name: Report WOL configuration
#   ansible.builtin.debug:
#     msg: |
#       Wake-on-LAN Configuration Summary:
#       ===================================
#       Bridges Configured: {{ wol_bridges_list | join(', ') }}
#       Physical Interfaces: {{ wol_final_interfaces | join(', ') }}
#       WOL Mode: {{ wol_mode }}
#       {% if wol_has_bond0 | default(false) %}
#       Bond0 Detected: Yes
#       Bond0 Slaves: {{ wol_bond0_slaves | join(', ') }}
#       {% endif %}
#       {% if wol_report_mac and wol_mac_addresses | length > 0 %}
#       MAC Addresses:
#       {% for iface, mac in (wol_final_interfaces | zip(wol_mac_addresses) | list) %}
#         - {{ iface }}: {{ mac | default('Unable to detect') }}
#       {% endfor %}
#       {% endif %}