platon: Set the MAC address that is registered in the router

inventory.yml

@@ -76,6 +76,7 @@ all:
       server_admin: "admin+unicorn@netz39.de"
     platon.n39.eu:
       server_admin: "admin+platon@netz39.de"
+      mac: "b8:27:eb:8f:98:2f"
     radon.n39.eu:
       server_admin: "admin+radon@netz39.de"
     krypton.n39.eu:

platon.yml

@@ -18,3 +18,13 @@
           # Should come from ble-keeper-role
           # see https://github.com/netz39/ble-keykeeper-role/issues/4
           - python3-pip
+
+
+    - name: Set MAC address for proper DHCP recognition
+      # Uses mac variable from inventory
+      ansible.builtin.template:
+        src: templates/network-interfaces-dhcp-mac.j2
+        dest: /etc/network/interfaces.d/platon-mac
+        owner: root
+        group: root
+        mode: '0644'

templates/network-interfaces-dhcp-mac.j2

@@ -0,0 +1,6 @@
+# Set a specific MAC address to enable DHCP recognition
+allow-hotplug eth0
+iface eth0 inet dhcp
+    hwaddress ether {{ mac }}
+
+# THIS FILE IS MANAGED VIA ANSIBLE!