Add gc2 configuration

modules/nixos/my_users/default.nix

@@ -32,6 +32,7 @@ in
         shell = pkgs.zsh;
         extraGroups = [ "wheel" ];
         hashedPassword = "$y$j9T$9ATrmrhedhb.mAZ4//PiN/$OStCOaJHt3kPA63imTG3zLMWCSLoWCUph5O6jl5mcZ.";
+        isNormalUser = true;
       };
       root = lib.snowfall.mkUser {
         hashedPassword = "$6$xa/mFg4OxIbb8XiQ$S2RVyCKcLaKHymFs48u8vj1dv.mQdxt.BQoucJsr8wfcHayXwKfD0C2NIOYY5AEPR9zgnMvFp8d8STKe6wMGR/";

systems/x86_64-linux/nut-gc2/default.nix

@@ -0,0 +1,126 @@
+{
+  pkgs,
+  inputs,
+  lib,
+  config,
+  ...
+}:
+let
+  inherit (inputs) disko home-manager;
+in
+{
+  imports = [
+    disko.nixosModules.disko
+    home-manager.nixosModules.home-manager
+    ./disko-config.nix
+    ./hardware-configuration.nix
+  ];
+  config = {
+    age.secrets.k3s.file = ../../../secrets/k3s.age;
+
+    my_users.enable = true;
+    my_nix.enable = true;
+
+    my_k3s = {
+      enable = true;
+      role = "agent";
+      tokenFile = config.age.secrets.k3s.path;
+      clusterInit = false;
+      serverAddr = "https://10.222.0.87:6443";
+      nodeIp = "10.222.0.???";
+      iface = "ztxh6lvd6t";
+    };
+    networking.hostName = "nut-gc2";
+
+    boot = {
+      tmp.cleanOnBoot = true;
+      loader.grub.enable = true;
+      kernel.sysctl = {
+        "net.ipv4.ip_forward" = 1;
+      };
+    };
+
+    time.timeZone = "Asia/Singapore";
+
+    services.udev.extraRules = ''
+      ATTR{address}=="00:72:f1:f7:47:db", NAME="ens3"
+    '';
+
+    networking = {
+      nameservers = [
+        "1.1.1.1"
+        "8.8.8.8"
+      ];
+      defaultGateway = {
+        address = "103.149.46.126";
+        interface = "ens3";
+      };
+      defaultGateway6 = {
+        address = "2a11:8083:11::1";
+        interface = "ens3";
+      };
+      dhcpcd.enable = false;
+      usePredictableInterfaceNames = lib.mkForce true;
+      interfaces = {
+        ens3 = {
+          ipv4.addresses = [
+            {
+              address = "103.149.46.7";
+              prefixLength = 25;
+            }
+          ];
+          ipv6.addresses = [
+            {
+              address = "2a11:8083:11:13d4::a";
+              prefixLength = 64;
+            }
+            {
+              address = "fe80::272:f1ff:fef7:47db";
+              prefixLength = 64;
+            }
+          ];
+          ipv4.routes = [
+            {
+              address = "103.149.46.126";
+              prefixLength = 32;
+            }
+          ];
+          ipv6.routes = [
+            {
+              address = "2a11:8083:11::1";
+              prefixLength = 128;
+            }
+          ];
+        };
+      };
+      firewall = {
+        enable = true;
+        allowedTCPPorts = [
+          22
+        ];
+        trustedInterfaces = [
+          "tailscale0"
+          "ztxh6lvd6t"
+        ];
+      };
+    };
+    services.openssh = {
+      enable = true;
+      settings.PasswordAuthentication = false;
+    };
+
+    services.tailscale.enable = true;
+
+    environment.systemPackages = with pkgs; [
+      git
+      neovim
+      btop
+    ];
+
+    services.zerotierone = {
+      enable = true;
+      joinNetworks = [ "23992b9a659115b6" ];
+    };
+    system.stateVersion = "25.11";
+  };
+}

systems/x86_64-linux/nut-gc2/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "ahci" "sd_mod" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens3.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}