generify the vpn setup

modules/nixos/default.nix

@@ -1,6 +1,5 @@
 # Add your reusable NixOS modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
 # These should be stuff you would like to share with others, not your personal configurations.
 {
-  # List your module files here
-  contabo.wan = import ./contabo/wan;
+  vpn-ip = import ./vpn-ip;
 }

modules/nixos/vpn-ip/default.nix

@@ -0,0 +1,14 @@
+{lib, ...}:
+with lib; {
+  # Declare what settings a user of this "hello.nix" module CAN SET.
+  options.services.vpn-ip = {
+    ip = mkOption {
+      type = types.str;
+      default = "0";
+    };
+    publicKey = mkOption {
+      type = types.str;
+      default = "";
+    };
+  };
+}

nixos/hosts/EDI/configuration.nix

@@ -1,16 +1,13 @@
 # This is your system's configuration file.
 # Use this to configure your system environment (it replaces /etc/nixos/configuration.nix)
 {
-  inputs,
+  outputs,
   lib,
   pkgs,
-  config,
   ...
 }: {
   # You can import other NixOS modules here
   imports = [
-    # Import home-manager's NixOS module
-    inputs.home-manager.nixosModules.home-manager
     # If you want to use modules your own flake exports (from modules/nixos):
     # outputs.nixosModules.example
 
@@ -21,37 +18,20 @@
     # You can also split up your configuration and import pieces of it here:
     # ./users.nix
 
-    ../../../disko/EDI
+    outputs.nixosModules.vpn-ip
 
-    # Import your generated (nixos-generate-config) hardware configuration
-    ./hardware-configuration.nix
+    ../../../disko/EDI
   ];
 
   environment.systemPackages = with pkgs; [
   ];
-  networking = {
-    hostName = "EDI";
 
-    wireguard.enable = true;
-
-    wg-quick.interfaces = {
-      wg0 = {
-        autostart = true;
-        address = ["10.0.0.3/24" "fdc9:281f:04d7:9ee9::3/64"];
-        dns = ["10.0.0.1" "fdc9:281f:04d7:9ee9::1"];
-        listenPort = 51821;
-        privateKeyFile = config.sops.secrets."wg-private-key".path;
-        peers = [
-          {
-            publicKey = "A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=";
-            endpoint = "84.87.146.85:51821";
-            allowedIPs = ["0.0.0.0/0" "::/0"];
-            persistentKeepalive = 25;
-          }
-        ];
-      };
-    };
+  services.vpn-ip = {
+    ip = "3";
   };
+
+  networking.hostName = "EDI";
+
   boot = {
     # Lanzaboote currently replaces the systemd-boot module.
     # This setting is usually set to true in configuration.nix

nixos/hosts/GLaDOS/configuration.nix

@@ -2,14 +2,15 @@
 # Use this to configure your system environment (it replaces /etc/nixos/configuration.nix)
 {
   inputs,
+  outputs,
   pkgs,
-  config,
   ...
 }: {
   # You can import other NixOS modules here
   imports = [
     # Import home-manager's NixOS module
     inputs.home-manager.nixosModules.home-manager
+    outputs.nixosModules.vpn-ip
     # If you want to use modules your own flake exports (from modules/nixos):
     # outputs.nixosModules.example
 
@@ -31,6 +32,12 @@
   environment.systemPackages = with pkgs; [
   ];
 
+  services.vpn-ip = {
+    ip = "2";
+  };
+
+  networking.hostName = "GLaDOS";
+
   services.xserver.videoDrivers = ["amdgpu"];
   hardware = {
     # Add vulkan support to GPU
@@ -74,31 +81,6 @@
 
   users.users.lillian.extraGroups = ["gamemode"];
 
-  networking = {
-    # virtualisation.waydroid.enable = false;
-    hostName = "GLaDOS";
-
-    wireguard.enable = true;
-
-    wg-quick.interfaces = {
-      wg0 = {
-        autostart = true;
-        address = ["10.0.0.2/24" "fdc9:281f:04d7:9ee9::2/64"];
-        dns = ["10.0.0.1" "fdc9:281f:04d7:9ee9::1"];
-        listenPort = 51821;
-        privateKeyFile = config.sops.secrets."wg-private-key".path;
-        peers = [
-          {
-            publicKey = "A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=";
-            endpoint = "84.87.146.85:51821";
-            allowedIPs = ["0.0.0.0/0" "::/0"];
-            persistentKeepalive = 25;
-          }
-        ];
-      };
-    };
-  };
-
   # https://nixos.wiki/wiki/FAQ/When_do_I_update_stateVersion
   system.stateVersion = "24.11";
 }

nixos/hosts/queen/configuration.nix

@@ -1,5 +1,6 @@
 {
   inputs,
+  outputs,
   lib,
   pkgs,
   ...
@@ -12,6 +13,8 @@
     # Or modules exported from other flakes (such as nix-colors):
     # inputs.nix-colors.homeManagerModules.default
 
+    outputs.nixosModules.vpn-ip
+
     # You can also split up your configuration and import pieces of it here:
     # ./nvim.nix
     ./hardware-configuration.nix
@@ -142,6 +145,9 @@
     };
 
     hostName = "queen";
+
+    # Disable the server going through wireguard vpn for now
+    wireguard.enable = lib.mkForce false;
   };
 
   # networking.useNetworkd = true;

nixos/hosts/shodan/configuration.nix

@@ -3,7 +3,6 @@
   outputs,
   lib,
   pkgs,
-  config,
   ...
 }: {
   imports = [
@@ -15,6 +14,8 @@
     # Or modules exported from other flakes (such as nix-colors):
     # inputs.nix-colors.homeManagerModules.default
 
+    outputs.nixosModules.vpn-ip
+
     # Import the shared settings
     ../../desktop/package-configs/firefox
 
@@ -63,27 +64,11 @@
     firewall.allowedTCPPorts = [22];
 
     hostName = "shodan";
-
-    wireguard.enable = true;
-
-    wg-quick.interfaces = {
-      wg0 = {
-        autostart = true;
-        address = ["10.0.0.4/24" "fdc9:281f:04d7:9ee9::4/64"];
-        dns = ["10.0.0.1" "fdc9:281f:04d7:9ee9::1"];
-        listenPort = 51821;
-        privateKeyFile = config.sops.secrets."wg-private-key".path;
-        peers = [
-          {
-            publicKey = "A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=";
-            endpoint = "84.87.146.85:51821";
-            allowedIPs = ["0.0.0.0/0" "::/0"];
-            persistentKeepalive = 25;
-          }
-        ];
-      };
-    };
   };
+  services.vpn-ip = {
+    ip = "4";
+  };
+
   services = {
     openssh.enable = true; # Enables support for 32bit libs that steam uses
 

nixos/hosts/wheatley/configuration.nix

@@ -12,7 +12,6 @@
     ./hardware-configuration.nix
 
     # Import shared settings
-    ../../shared
   ];
 
   nixpkgs.overlays = [
@@ -209,7 +208,8 @@
       #   };
 
       # wg public key for host: A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=
-      wg1 = {
+      # TODO: generate this dynamically based on other hosts
+      wg0 = lib.mkForce {
         # Determines the IP address and subnet of the server's end of the tunnel interface.
         address = ["10.0.0.1/24" "fdc9:281f:04d7:9ee9::1/64"];
 

nixos/shared/default.nix

@@ -10,6 +10,7 @@
     ./locale
     ./packages
     inputs.home-manager.nixosModules.home-manager
+    #../hosts/${config.networking.hostName}/hardware-configuration.nix
   ];
   sops = {
     age.keyFile = ../../../../../../var/secrets/keys.txt;
@@ -134,6 +135,28 @@
     pkgs.nerd-fonts.fira-mono
   ];
 
+  networking = {
+    wireguard.enable = true;
+
+    wg-quick.interfaces = {
+      wg0 = {
+        autostart = true;
+        address = ["10.0.0.${config.services.vpn-ip.ip}/24" "fdc9:281f:04d7:9ee9::${config.services.vpn-ip.ip}/64"];
+        dns = ["10.0.0.1" "fdc9:281f:04d7:9ee9::1"];
+        listenPort = 51821;
+        privateKeyFile = config.sops.secrets."wg-private-key".path;
+        peers = [
+          {
+            publicKey = "A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=";
+            endpoint = "84.87.146.85:51821";
+            allowedIPs = ["0.0.0.0/0" "::/0"];
+            persistentKeepalive = 25;
+          }
+        ];
+      };
+    };
+  };
+
   # Enable completion of system packages by zsh
   environment.pathsToLink = ["/share/zsh"];