alpine: rename network interfaces

Mostly relevant for VMs, to match the names with proxmox.

roles/alpine/tasks/main.yml

@@ -1,3 +1,19 @@
+- name: Tell ifupdown to rename network interfaces
+  copy:
+    dest: /etc/network/if-pre-up.d/nameif
+    content: |
+      #!/bin/sh
+      nameif -s
+    mode: 0755
+  notify: restart networking
+
+- name: Configure interface names
+  template:
+    dest: /etc/mactab
+    src: mactab.j2
+    mode: 0644
+  notify: restart networking
+
 - name: Set up network interfaces
   template:
     dest: /etc/network/interfaces

roles/alpine/templates/mactab.j2

@@ -0,0 +1,3 @@
+{% for iface in interfaces | selectattr('mac_address') %}
+{{ iface.name }} {{ iface.mac_address | lower }}
+{% endfor %}