feat(configuration): multi-backend networking, bind by match not MAC

roles/configuration/templates/network.j2

@@ -3,12 +3,18 @@ id=LAN-{{ idx }}
 uuid={{ configuration_net_uuid }}
 type=ethernet
 autoconnect-priority=10
-{% if configuration_iface_name | length > 0 %}
-interface-name={{ configuration_iface_name }}
-{% endif %}
-
-[ipv4]
 {% set iface = configuration_iface %}
+{% if iface.name | default('') | string | length %}
+interface-name={{ iface.name }}
+
+{% else %}
+{# Bind the first available ethernet by name glob, never a MAC: a clone with a new adapter/MAC stays networked (#12). #}
+
+[match]
+interface-name=en*;eth*;
+
+{% endif %}
+[ipv4]
 {% set dns_list = configuration_dns_list %}
 {% set search_list = configuration_dns_search %}
 {% if iface.ip | default('') | string | length %}

roles/configuration/templates/network_eni.j2

@@ -0,0 +1,23 @@
+auto lo
+iface lo inet loopback
+
+{% for iface in system_cfg.network.interfaces %}
+{% set ifname = iface.name if (iface.name | default('') | string | length) else (configuration_eni_detected[loop.index0] | default('eth' ~ loop.index0)) %}
+auto {{ ifname }}
+{% if iface.ip | default('') | string | length %}
+iface {{ ifname }} inet static
+    address {{ iface.ip }}/{{ iface.prefix }}
+{% if iface.gateway | default('') | string | length %}
+    gateway {{ iface.gateway }}
+{% endif %}
+{% if loop.index0 == 0 and configuration_dns_list %}
+    dns-nameservers {{ configuration_dns_list | join(' ') }}
+{% endif %}
+{% if loop.index0 == 0 and configuration_dns_search %}
+    dns-search {{ configuration_dns_search | join(' ') }}
+{% endif %}
+{% else %}
+iface {{ ifname }} inet dhcp
+{% endif %}
+
+{% endfor %}

roles/configuration/templates/network_netplan.j2

@@ -0,0 +1,29 @@
+network:
+  version: 2
+  ethernets:
+{% for iface in system_cfg.network.interfaces %}
+    lan{{ loop.index0 }}:
+{# Unnamed binds the first ethernet by name glob (e* = en*/eth*, netplan match.name takes one glob), never a MAC (#12). #}
+      match:
+        name: "{{ iface.name if (iface.name | default('') | string | length) else 'e*' }}"
+{% if iface.ip | default('') | string | length %}
+      addresses:
+        - {{ iface.ip }}/{{ iface.prefix }}
+{% if iface.gateway | default('') | string | length %}
+      routes:
+        - to: default
+          via: {{ iface.gateway }}
+{% endif %}
+{% else %}
+      dhcp4: true
+{% endif %}
+{% if loop.index0 == 0 and (configuration_dns_list or configuration_dns_search) %}
+      nameservers:
+{% if configuration_dns_list %}
+        addresses: [{{ configuration_dns_list | join(', ') }}]
+{% endif %}
+{% if configuration_dns_search %}
+        search: [{{ configuration_dns_search | join(', ') }}]
+{% endif %}
+{% endif %}
+{% endfor %}

roles/configuration/templates/network_networkd.j2

@@ -0,0 +1,27 @@
+[Match]
+{% set iface = configuration_iface %}
+{% if iface.name | default('') | string | length %}
+Name={{ iface.name }}
+{% else %}
+{# First available ethernet by name glob + device type, never a MAC (#12). #}
+Name=en* eth*
+Type=ether
+{% endif %}
+
+[Network]
+{% if iface.ip | default('') | string | length %}
+Address={{ iface.ip }}/{{ iface.prefix }}
+{% if iface.gateway | default('') | string | length %}
+Gateway={{ iface.gateway }}
+{% endif %}
+{% else %}
+DHCP=yes
+{% endif %}
+{% if idx | int == 0 and configuration_dns_list %}
+{% for dns in configuration_dns_list %}
+DNS={{ dns }}
+{% endfor %}
+{% if configuration_dns_search %}
+Domains={{ configuration_dns_search | join(' ') }}
+{% endif %}
+{% endif %}