modular interface involation

configuration.nix

@@ -24,7 +24,6 @@
       ./hwaccel.nix
 
       # Services
-      ./keepalived.nix
       ./wireguard.nix
       ./docker.nix
       ./docker-device-mapper.nix
@@ -47,13 +46,21 @@
   networking.hostName = config.vars.hostname; # Define your hostname.
   networking.hostId = config.vars.hostid; # Define your hostID - Needs to be unique!.
   networking = {
-    interfaces.${lib.head config.vars.interfaces} = {
-      ipv4.addresses = [{
-        address = config.vars.local_ip;
-        prefixLength = 24;
-      }];
-    };
+    interfaces = let
+      primaryInterface = lib.head config.vars.interfaces;
+      secondaryInterfaces = lib.tail config.vars.interfaces;
+    in
+    lib.foldr (name: acc: acc // {
+      ${name}.useDHCP = true;
+    }) (
+      { ${primaryInterface}.ipv4.addresses = [{
+          address = config.vars.local_ip;
+          prefixLength = 24;
+        }];
+      }
+    ) secondaryInterfaces;
   };
+
   networking.defaultGateway = {
     address = "192.168.178.1";
     interface = lib.head config.vars.interfaces;