Values: Make generic network configs for openstack guests

hosts/ildkule/configuration.nix

@@ -20,10 +20,20 @@
   zramSwap.enable = true;
 
   networking.hostName = "ildkule"; # Define your hostname.
-  systemd.network.networks."30-all" = values.defaultNetworkConfig // {
-    matchConfig.Name = "en*";
-    DHCP = "yes";
-    gateway = [ ];
+
+  # Main connection, using the global/floatig IP, for communications with the world
+  systemd.network.networks."30-ntnu-global" = values.openstackGlobalNetworkConfig // {
+    matchConfig.Name = "ens4";
+
+    # Add the global address in addition to the local address learned from DHCP
+    addresses = [
+      { addressConfig.Address = "${values.hosts.ildkule.ipv4_global}/32"; }
+    ];
+  };
+
+  # Secondary connection only for use within the university network
+  systemd.network.networks."40-ntnu-internal" = values.openstackLocalNetworkConfig // {
+    matchConfig.Name = "ens3";
   };
 
   # List packages installed in system profile

values.nix

@@ -73,4 +73,27 @@ in rec {
     DHCP = "no";
   };
 
+  openstackGlobalNetworkConfig = {
+    networkConfig.IPv6AcceptRA = "no";
+    dns = [ "129.241.0.200" "129.241.0.201" ];
+    domains = [ "pvv.ntnu.no" "pvv.org" ];
+    DHCP = "yes";
+  };
+
+  openstackLocalNetworkConfig = {
+    networkConfig.IPv6AcceptRA = "no";
+    dns = [ "129.241.0.200" "129.241.0.201" ];
+    domains = [ "pvv.ntnu.no" "pvv.org" ];
+    DHCP = "yes";
+    routes = [
+      {
+        routeConfig.Destination = "10.0.0.0/8";
+      }
+    ];
+    linkConfig.RequiredForOnline = "no";
+    dhcpV4Config = {
+      # Only use this network for link-local networking, no global/default routes
+      UseRoutes = "no";
+    };
+  };
 }