ifupdown2: add minimal role

roles/ifupdown2/tasks/main.yml

@@ -0,0 +1,31 @@
+---
+- name: Gather package facts
+  package_facts:
+    manager: apt
+
+- name: Check if ifupdown2 is installed
+  set_fact:
+    must_mask: "{{ 'ifupdown2' not in ansible_facts.packages }}"
+
+- name: Mask networking before installing ifupdown2
+  systemd:
+    name: networking.service
+    masked: true
+  when: must_mask
+
+- name: Install ifupdown2
+  apt:
+    name: ifupdown2
+
+- name: Unmask networking now that ifupdown2 is installed
+  systemd:
+    name: networking.service
+    masked: false
+  when: must_mask
+
+- name: Enable and start networking
+  systemd:
+    name: networking.service
+    state: started
+    enabled: true
+...