roles/net-ifaces: Configure virtual net interfaces

The *net-ifaces* role manages a script that creates virtual network
interfaces, such as bridge, bond, and VLAN, that `dhcpcd`/`dhclient`
alone cannot. This provides a lightweight alternative to
*systemd-networkd* and *NetworkMangager*.

roles/net-ifaces/tasks/main.yml

@@ -0,0 +1,17 @@
+- name: ensure net-ifaces script is installed
+  copy:
+    src={{ inventory_hostname }}.sh
+    dest=/usr/local/libexec/net-ifaces.sh
+    mode=0755
+
+- name: ensure net-ifaces systemd unit is installed
+  copy:
+    src=net-ifaces.service
+    dest=/etc/systemd/system/net-ifaces.service
+    mode=0644
+  notify: reload systemd
+
+- name: ensure net-ifaces service starts at boot
+  service:
+    name=net-ifaces
+    enabled=yes