Ansible-Bootstrap/roles/configuration/tasks/network.yml

---
- name: Generate UUID for Network Profile
  ansible.builtin.set_fact:
    configuration_net_uuid: "{{ ('LAN-' ~ hostname) | ansible.builtin.to_uuid }}"
  changed_when: false

- name: Read network interfaces
  ansible.builtin.command:
    argv:
      - ip
      - -o
      - link
      - show
  register: configuration_ip_link
  changed_when: false
  failed_when: false

- name: Resolve network interface and MAC address
  vars:
    configuration_net_inf_from_facts: "{{ (ansible_default_ipv4 | default({})).get('interface', '') }}"
    configuration_net_inf_from_ip: >-
      {{
        (
          configuration_ip_link.stdout
          | default('')
          | regex_findall('^[0-9]+: ([^:]+):', multiline=True)
          | reject('equalto', 'lo')
          | list
          | first
        )
        | default('')
      }}
    configuration_net_inf_detected: >-
      {{ configuration_net_inf_from_facts | default(configuration_net_inf_from_ip, true) }}
    configuration_net_inf_regex: "{{ configuration_net_inf_detected | ansible.builtin.regex_escape }}"
    configuration_net_mac_from_virtualization: "{{ virtualization_mac_address | default('') }}"
    configuration_net_mac_from_facts: >-
      {{
        (
          (ansible_facts | default({})).get(configuration_net_inf_detected, {}).get('macaddress', '')
        )
        | default(
            (ansible_facts | default({})).get('ansible_' + configuration_net_inf_detected, {}).get('macaddress', ''),
            true
          )
      }}
    configuration_net_mac_from_ip: >-
      {{
        (
          configuration_ip_link.stdout
          | default('')
          | regex_findall(
              '^\\d+: ' ~ configuration_net_inf_regex ~ ':.*?link/ether\\s+([0-9A-Fa-f:]{17})',
              multiline=True
            )
          | first
        )
        | default('')
      }}
  ansible.builtin.set_fact:
    configuration_net_inf: "{{ configuration_net_inf_detected }}"
    configuration_net_mac: >-
      {{
        (
          configuration_net_mac_from_virtualization
          | default(configuration_net_mac_from_facts, true)
          | default(configuration_net_mac_from_ip, true)
        )
        | upper
      }}
  changed_when: false

- name: Validate Network Interface Name
  ansible.builtin.assert:
    that:
      - configuration_net_inf | length > 0
    fail_msg: Failed to detect an active network interface.

- name: Validate Network Interface MAC Address
  ansible.builtin.assert:
    that:
      - configuration_net_mac | length > 0
    fail_msg: Failed to detect the MAC address for network interface {{ configuration_net_inf }}.

- name: Configure NetworkManager profile
  when: os | lower not in ["alpine", "void"]
  block:
    - name: Copy NetworkManager keyfile
      ansible.builtin.template:
        src: network.j2
        dest: /mnt/etc/NetworkManager/system-connections/LAN.nmconnection
        mode: "0600"

    - name: Fix Ubuntu unmanaged devices
      when: os | lower in ["ubuntu", "ubuntu-lts"]
      ansible.builtin.file:
        path: /mnt/etc/NetworkManager/conf.d/10-globally-managed-devices.conf
        state: touch
        mode: "0644"

- name: Configure Alpine networking
  when: os | lower == "alpine"
  vars:
    configuration_dns_list: "{{ system_cfg.dns.servers | default([]) }}"
    configuration_alpine_static: >-
      {{
        system_cfg.ip is defined
        and system_cfg.ip | string | length > 0
        and system_cfg.prefix is defined
        and (system_cfg.prefix | string | length) > 0
      }}
  block:
    - name: Write Alpine network interfaces
      ansible.builtin.copy:
        dest: /mnt/etc/network/interfaces
        mode: "0644"
        content: |
          auto lo
          iface lo inet loopback

          auto {{ configuration_net_inf }}
          iface {{ configuration_net_inf }} inet {{ 'static' if configuration_alpine_static | bool else 'dhcp' }}
          {% if configuration_alpine_static | bool %}
            address {{ system_cfg.ip }}/{{ system_cfg.prefix }}
          {% if system_cfg.gateway is defined and system_cfg.gateway | string | length %}
            gateway {{ system_cfg.gateway }}
          {% endif %}
          {% endif %}

    - name: Set Alpine DNS resolvers
      when: configuration_dns_list | length > 0
      ansible.builtin.copy:
        dest: /mnt/etc/resolv.conf
        mode: "0644"
        content: |
          {% for resolver in configuration_dns_list %}
          nameserver {{ resolver }}
          {% endfor %}

- name: Configure Void networking
  when: os | lower == "void"
  vars:
    configuration_dns_list: "{{ system_cfg.dns.servers | default([]) }}"
    configuration_void_static: >-
      {{
        system_cfg.ip is defined
        and system_cfg.ip | string | length > 0
        and system_cfg.prefix is defined
        and (system_cfg.prefix | string | length) > 0
      }}
  block:
    - name: Write dhcpcd configuration for static networking
      when: configuration_void_static | bool
      ansible.builtin.copy:
        dest: /mnt/etc/dhcpcd.conf
        mode: "0644"
        content: |
          interface {{ configuration_net_inf }}
          static ip_address={{ system_cfg.ip }}/{{ system_cfg.prefix }}
          {% if system_cfg.gateway is defined and system_cfg.gateway | string | length %}
          static routers={{ system_cfg.gateway }}
          {% endif %}
          {% if configuration_dns_list | length > 0 %}
          static domain_name_servers={{ configuration_dns_list | join(' ') }}
          {% endif %}