Refactor network role

roles/network/tasks/main.yml

@@ -8,12 +8,15 @@
 
 - name: systemd-networkd
   include: systemd-networkd.yml
+  when: network_manage_systemd_networkd
 
 - name: ifupdown
   include: ifupdown.yml
+  when: network_manage_ifupdown
 
 - name: netplan.io
   include: netplan.yml
+  when: network_manage_netplan
 
 # resolv.conf
 

roles/network/tasks/systemd-networkd.yml

@@ -19,5 +19,15 @@
     dest: "/etc/systemd/network/05-{{ item.name }}.network"
   notify: restart systemd-networkd
   with_items: "{{ network_interfaces }}"
-  when: _network_systemd_networkd_enabled | bool
+  when:
+    - network_interfaces is defined
+    - _network_systemd_networkd_enabled | bool
 
+- name: configure systemd-networkd default interface
+  template:
+    src: systemd-network.j2
+    dest: "/etc/systemd/network/05-{{ ansible_default_ipv4.interface }}.network"
+  notify: restart systemd-networkd
+  when:
+    - network_interfaces is not defined
+    - _network_systemd_networkd_enabled | bool