ifupdown2: simple interfaces file configuration

roles/ifupdown2/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+ifupdown2__interfaces: {}
+...

roles/ifupdown2/handlers/main.yml

@@ -0,0 +1,6 @@
+---
+- name: Restart networking
+  systemd:
+    name: networking.service
+    state: restarted
+...

roles/ifupdown2/tasks/main.yml

@@ -23,6 +23,16 @@
     masked: false
   when: must_mask
 
+- name: Configure ifupdown2
+  template:
+    src: interfaces.j2
+    dest: /etc/network/interfaces
+    owner: root
+    group: root
+    mode: u=rw,g=r,o=
+  notify:
+    - Restart networking
+
 - name: Enable and start networking
   systemd:
     name: networking.service

roles/ifupdown2/templates/interfaces.j2

@@ -0,0 +1,12 @@
+{{ ansible_managed | comment }}
+
+{% for name, iface in ifupdown2__interfaces.items() %}
+allow-hotplug {{ name }}
+iface {{ name }}
+{% for address in iface.addresses %}
+    address {{ address | ipaddr }}
+{% endfor %}
+{% for gateway in iface.gateways %}
+    gateway {{ gateway | ipaddr }}
+{% endfor %}
+{% endfor %}