feat(networking): Add a bridge to connect VMs to the world

machines/krz01/_configuration.nix

@@ -8,12 +8,13 @@ lib.extra.mkConfig {
   enabledServices = [
     # INFO: This list needs to stay sorted alphabetically
     # Machine learning API machine
-    "microvm-ml01"
-    "microvm-router01"
+    # "microvm-ml01"
+    # "microvm-router01"
     "nvidia-tesla-k80"
     "ollama"
     "whisper"
     "proxmox"
+    "networking"
   ];
 
   extraConfig = {

machines/krz01/networking.nix

@@ -0,0 +1,22 @@
+{
+  systemd.networknetworks = {
+    "10-eno1" = {
+      matchConfig.Name = [ "eno1" ];
+      networkConfig = {
+        Bridge = "vmbr0";
+      };
+    };
+
+    "10-vmbr0" = {
+      matchConfig.Name = "vmbr0";
+      linkConfig.RequiredForOnline = "routable";
+    };
+  };
+
+  systemd.network.netdevs."vmbr0" = {
+    netdevConfig = {
+      Name = "vmbr0";
+      Kind = "bridge";
+    };
+  };
+}

meta/network.nix

@@ -31,7 +31,8 @@
 
   krz01 = {
     interfaces = {
-      eno1 = {
+      # see also machines/krz01/networking.nix
+      vmbr0 = {
         ipv4 = [
           {
             address = "129.199.146.21";