Can precise interfaces in bridged network

tasks/main.yml

@@ -70,6 +70,12 @@
   tags:
     - networking
 
+- name: ensure interfaces.d directory exists
+  file:
+    path: /etc/network/interfaces.d
+    state: directory
+  when: wanted_ip4 is defined or wanted_ip6 is defined
+
 - name: configure watchdog
   template:
     src: watchdog.conf.j2

tasks/pkg_Alpine.yml

@@ -51,6 +51,15 @@
   tags:
     - pkg
 
+- name: install bridge (alpine)
+  apk:
+    name:
+      - bridge
+    state: present
+  when: bridged_network is defined
+  tags:
+    - pkg
+
 - name: install ssmtp (alpine)
   apk:
     name:

templates/networking.j2

@@ -7,19 +7,31 @@ iface lo inet loopback
 
 # The main interface
 auto eth0
+{% if bridged_network is defined and bridged_network %}
+auto br0
+iface br0
+    requires eth0{% if bridged_network != "true" %} {{ bridged_network }}{% endif +%}
+    bridge-ports eth0{% if bridged_network != "true" %} {{ bridged_network }}{% endif +%}
+    bridge-fd 0
+    bridge-stp off
+{% else %}
+iface eth0
+{% endif %}
 {% if wanted_ip4 is defined %}
-iface eth0 inet static
     address {{ wanted_ip4 }}/24
     gateway {{ local_network.gateway }}
 {% else %}
-iface eth0 inet dhcp
+    use dhcp
 {% endif %}
 {% if wanted_ip6 is defined %}
-iface eth0 inet6 static
 {% if local_network.gateway6 is defined %}
     address {{ wanted_ip6 }}/64
     gateway {{ local_network.gateway6 }}
+    {% if bridged_network is defined and bridged_network %}
+    up echo 0 > /proc/sys/net/ipv6/conf/br0/accept_ra
+    {% else %}
     pre-up echo 0 > /proc/sys/net/ipv6/conf/eth0/accept_ra
+    {% endif %}
 {% else %}
     address {{ wanted_ip6 }}/128
     post-up ip addrlabel add prefix {{ wanted_ip6 }}/64 label 99