Add templating of network interfaces

Closes #1

roles/base/tasks/main.yml

@@ -196,6 +196,22 @@
 # System configuration
 #
 
+# networking
+- name: install base interfaces file
+  template:
+    src: etc/network/interfaces.j2
+    dest: /etc/network/interfaces
+  tags: network
+
+- name: install per-interface files
+  template:
+    src: etc/network/interfaces-perif.j2
+    dest: /etc/network/interfaces.d/{{ network.key }}
+  with_dict: "{{ networks }}"
+  loop_control:
+    loop_var: network
+  tags: network
+
 # capabilities
 - name: set ping capabilities
   capabilities:

roles/base/templates/etc/network/interfaces-perif.j2

@@ -0,0 +1,13 @@
+# PVC node interface-specific interface file - {{ network.key }}
+# {{ ansible_managed }}
+
+auto {{ network.value['device'] }}
+iface {{ network.value['device'] }} inet manual
+    post-up ip link set $IFACE mtu {{ network.value['mtu'] }}
+{% if network.value['type'] == 'bond' %}
+    bond_mode {{ network.value['bond_mode'] }}
+    slaves {% for device in network.value['bond_devices'] %}{{ device }} {% endfor %}
+{% endif %}
+{% if network.value['type'] == 'vlan' %}
+    vlan_raw_device {{ network.value['raw_device'] }}
+{% endif %}

roles/base/templates/etc/network/interfaces.j2

@@ -0,0 +1,10 @@
+# PVC node interfaces file
+# {{ ansible_managed }}
+
+# Loopback interface
+auto lo
+iface lo inet loopback
+iface lo inet6 loopback
+
+# Include directory
+source-directory /etc/network/interfaces.d