From 22974fe7067012f367fbf0accb7c0df4dff8d28e Mon Sep 17 00:00:00 2001
From: Felix Albrigtsen <felix@albrigtsen.it>
Date: Sun, 28 Jul 2024 20:31:02 +0200
Subject: [PATCH] Values: Make generic network configs for openstack guests

---
 hosts/ildkule/configuration.nix | 28 ++++++----------------------
 values.nix                      | 23 +++++++++++++++++++++++
 2 files changed, 29 insertions(+), 22 deletions(-)

diff --git a/hosts/ildkule/configuration.nix b/hosts/ildkule/configuration.nix
index 1ef0c15..12ceaa2 100644
--- a/hosts/ildkule/configuration.nix
+++ b/hosts/ildkule/configuration.nix
@@ -21,35 +21,19 @@
 
   networking.hostName = "ildkule"; # Define your hostname.
 
-  # Main connection for incoming and outgoing connections to the world, using the global ("floating") IP
-  systemd.network.networks."30-ntnu-global" = values.defaultNetworkConfig // {
+  # Main connection, using the global/floatig IP, for communications with the world
+  systemd.network.networks."30-ntnu-global" = values.openstackGlobalNetworkConfig // {
     matchConfig.Name = "ens4";
-    DHCP = "yes";
-    gateway = [ ];
+
+    # Add the global address in addition to the local address learned from DHCP
     addresses = [
-      {
-        # Add the global address in addition to the local address learned from DHCP
-        addressConfig.Address = "129.241.153.213/32";
-      }
+      { addressConfig.Address = "${values.hosts.ildkule.ipv4_global}/32"; }
     ];
   };
 
   # Secondary connection only for use within the university network
-  systemd.network.networks."40-ntnu-internal" = values.defaultNetworkConfig // {
+  systemd.network.networks."40-ntnu-internal" = values.openstackLocalNetworkConfig // {
     matchConfig.Name = "ens3";
-    DHCP = "yes";
-    gateway = [ ];
-    routes = [
-      {
-        routeConfig.Destination = "10.0.0.0/8";
-      }
-    ];
-    linkConfig.RequiredForOnline = "no";
-    dhcpV4Config = {
-      # Do not use this interface as a default / global route
-      # Note: This does not remove the link-local route 192.168.11.0/24, as it is added by the kernel itself
-      UseRoutes = "no";
-    };
   };
 
   # List packages installed in system profile
diff --git a/values.nix b/values.nix
index 0c68b65..ba335a3 100644
--- a/values.nix
+++ b/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";
+    };
+  };
 }