redis

flake.lock

@@ -7,32 +7,32 @@
         ]
       },
       "locked": {
-        "lastModified": 1714043624,
-        "narHash": "sha256-Xn2r0Jv95TswvPlvamCC46wwNo8ALjRCMBJbGykdhcM=",
+        "lastModified": 1752780124,
+        "narHash": "sha256-5dn97vIYxn6VozKePOQSDxVCsrl38nDdMJXx86KIJH0=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "86853e31dc1b62c6eeed11c667e8cdd0285d4411",
+        "rev": "c718918222bdb104397762dea67e6b397a7927fe",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-23.11",
+        "ref": "release-25.05",
         "repo": "home-manager",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713995372,
-        "narHash": "sha256-fFE3M0vCoiSwCX02z8VF58jXFRj9enYUSTqjyHAjrds=",
+        "lastModified": 1752480373,
+        "narHash": "sha256-JHQbm+OcGp32wAsXTE/FLYGNpb+4GLi5oTvCxwSoBOA=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "dd37924974b9202f8226ed5d74a252a9785aedf8",
+        "rev": "62e0f05ede1da0d54515d4ea8ce9c733f12d9f08",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-23.11",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -3,14 +3,14 @@
 
   inputs = {
     # Nixpkgs
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     # You can access packages and modules from different nixpkgs revs
     # at the same time. Here's an working example:
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     # Also see the 'unstable-packages' overlay at 'overlays/default.nix'.
 
     # Home manager
-    home-manager.url = "github:nix-community/home-manager/release-23.11";
+    home-manager.url = "github:nix-community/home-manager/release-25.05";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
   };
 

modules/nixos/default.nix

@@ -6,4 +6,5 @@
   incus = import ./incus.nix;
   orbstack = import ./orbstack.nix;
   power-user-defaults = import ./power-user-defaults.nix;
+  redis-cluster = import ./redis-cluster.nix;
 }

modules/nixos/orbstack.nix

@@ -30,7 +30,7 @@
   '';
 
   # Disable sshd
-  services.openssh.enable = false;
+  # services.openssh.enable = false; disable for port 22
 
   # systemd
   systemd.services."systemd-oomd".serviceConfig.WatchdogSec = 0;

modules/nixos/redis-cluster.nix

@@ -0,0 +1,531 @@
+# Redis Cluster NixOS Configuration Module
+# Optimized for high throughput and lowest latency
+# Security disabled for maximum performance
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+with lib;
+
+let
+  cfg = config.services.redisCluster;
+  
+  # Generate Redis instances for cluster
+  generateRedisInstances = masters: replicasPerMaster: basePort:
+    let
+      # Create master instances
+      masterInstances = listToAttrs (map (i: {
+        name = "master-${toString i}";
+        value = {
+          enable = true;
+          port = basePort + i;
+          bind = "0.0.0.0";  # Bind to all interfaces for cluster communication
+          
+          # Cluster configuration
+          extraParams = [
+            "--cluster-enabled" "yes"
+            "--cluster-config-file" "nodes-${toString (basePort + i)}.conf"
+            "--cluster-node-timeout" "5000"
+            "--cluster-announce-ip" cfg.announceIp
+            "--cluster-announce-port" (toString (basePort + i))
+          ];
+          
+          # Performance optimizations
+          save = [];  # Disable RDB for maximum performance
+          appendOnly = false;  # Disable AOF for maximum performance
+          
+          # High-performance settings
+          settings = {
+            # Memory and performance optimizations
+            maxclients = mkForce 65000;
+            timeout = mkForce 0;  # Never timeout connections
+            tcp-keepalive = mkForce 60;
+            tcp-backlog = mkForce 511;
+            
+            # Disable slow operations for performance
+            slowlog-log-slower-than = mkForce (-1);  # Disable slow log
+            
+            # Memory optimization
+            maxmemory-policy = mkForce "noeviction";  # Don't evict keys
+            
+            # Network optimizations
+            # Note: tcp-nodelay is automatically handled by Redis as a socket option
+            
+            # Hash optimizations for speed
+            hash-max-ziplist-entries = mkForce 512;
+            hash-max-ziplist-value = mkForce 64;
+            list-max-ziplist-size = mkForce (-2);
+            set-max-intset-entries = mkForce 512;
+            zset-max-ziplist-entries = mkForce 128;
+            zset-max-ziplist-value = mkForce 64;
+            
+            # Cluster optimizations
+            cluster-require-full-coverage = mkForce "no";  # Allow partial cluster operation
+            cluster-allow-reads-when-down = mkForce "yes";
+          };
+        };
+      }) (range 0 (masters - 1)));
+      
+      # Create replica instances
+      replicaInstances = listToAttrs (flatten (map (masterIdx: 
+        map (replicaIdx: {
+          name = "replica-${toString masterIdx}-${toString replicaIdx}";
+          value = {
+            enable = true;
+            port = basePort + masters + (masterIdx * replicasPerMaster) + replicaIdx;
+            bind = "0.0.0.0";
+            
+            # Cluster configuration
+            extraParams = [
+              "--cluster-enabled" "yes"
+              "--cluster-config-file" "nodes-${toString (basePort + masters + (masterIdx * replicasPerMaster) + replicaIdx)}.conf"
+              "--cluster-node-timeout" "5000"
+              "--cluster-announce-ip" cfg.announceIp
+              "--cluster-announce-port" (toString (basePort + masters + (masterIdx * replicasPerMaster) + replicaIdx))
+            ];
+            
+            # Performance optimizations (same as masters)
+            save = [];
+            appendOnly = false;
+            
+            settings = {
+              maxclients = mkForce 65000;
+              timeout = mkForce 0;
+              tcp-keepalive = mkForce 60;
+              tcp-backlog = mkForce 511;
+              slowlog-log-slower-than = mkForce (-1);
+              maxmemory-policy = mkForce "noeviction";
+              # Note: tcp-nodelay is automatically handled by Redis as a socket option
+              hash-max-ziplist-entries = mkForce 512;
+              hash-max-ziplist-value = mkForce 64;
+              list-max-ziplist-size = mkForce (-2);
+              set-max-intset-entries = mkForce 512;
+              zset-max-ziplist-entries = mkForce 128;
+              zset-max-ziplist-value = mkForce 64;
+              cluster-require-full-coverage = mkForce "no";
+              cluster-allow-reads-when-down = mkForce "yes";
+              
+              # Replica-specific settings
+              replica-read-only = mkForce "no";  # Allow writes to replicas in cluster mode
+            };
+          };
+        }) (range 0 (replicasPerMaster - 1))
+      ) (range 0 (masters - 1))));
+      
+    in masterInstances // replicaInstances;
+
+in
+
+{
+  options.services.redisCluster = {
+    enable = mkEnableOption "Redis Cluster";
+    
+    masters = mkOption {
+      type = types.int;
+      default = 3;
+      description = "Number of master nodes in the cluster (minimum 3)";
+    };
+    
+    replicasPerMaster = mkOption {
+      type = types.int;
+      default = 1;
+      description = "Number of replica nodes per master";
+    };
+    
+    basePort = mkOption {
+      type = types.int;
+      default = 7000;
+      description = "Base port number for Redis cluster nodes";
+    };
+    
+    announceIp = mkOption {
+      type = types.str;
+      default = "127.0.0.1";
+      description = "IP address to announce to other cluster nodes";
+    };
+    
+    openFirewall = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Open firewall ports for cluster communication";
+    };
+    
+    createCluster = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Automatically create and initialize the cluster";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    
+    assertions = [
+      {
+        assertion = cfg.masters >= 3;
+        message = "Redis cluster requires at least 3 master nodes";
+      }
+    ];
+
+    # Configure Redis instances
+    services.redis = {
+      # Global Redis optimizations
+      vmOverCommit = true;
+      package = pkgs.redis;
+      
+      servers = generateRedisInstances cfg.masters cfg.replicasPerMaster cfg.basePort;
+    };
+
+    # System-wide performance optimizations
+    boot.kernel.sysctl = {
+      # Network optimizations
+      "net.core.somaxconn" = mkForce "65535";
+      "net.core.netdev_max_backlog" = mkForce "5000";
+      "net.ipv4.tcp_max_syn_backlog" = mkForce "65535";
+      "net.ipv4.tcp_fin_timeout" = mkForce "30";
+      "net.ipv4.tcp_keepalive_time" = mkForce "1200";
+      "net.ipv4.tcp_keepalive_intvl" = mkForce "15";
+      "net.ipv4.tcp_keepalive_probes" = mkForce "5";
+      
+      # Memory optimizations
+      "vm.swappiness" = mkForce "1";
+      "vm.overcommit_memory" = mkForce "1";
+      "vm.dirty_background_ratio" = mkForce "5";
+      "vm.dirty_ratio" = mkForce "10";
+      
+      # File system optimizations
+      "fs.file-max" = mkForce "2097152";
+    };
+
+    # System-wide ulimit settings for Redis
+    security.pam.loginLimits = [
+      {
+        domain = "*";
+        type = "soft";
+        item = "nofile";
+        value = "1048576";
+      }
+      {
+        domain = "*";
+        type = "hard";
+        item = "nofile";
+        value = "1048576";
+      }
+    ];
+
+    # Service-level optimizations for all Redis instances
+    systemd.services = 
+      let
+        redisServices = map (i: "redis-master-${toString i}") (range 0 (cfg.masters - 1)) ++
+                       flatten (map (masterIdx: 
+                         map (replicaIdx: "redis-replica-${toString masterIdx}-${toString replicaIdx}") 
+                             (range 0 (cfg.replicasPerMaster - 1))
+                       ) (range 0 (cfg.masters - 1)));
+        
+        serviceConfig = {
+          # Resource limits - set much higher for Redis cluster
+          LimitNOFILE = "1048576";
+          LimitNPROC = "65535";
+          LimitMEMLOCK = "infinity";
+          
+          # CPU and scheduling optimizations
+          Nice = "-10";
+          IOSchedulingClass = "1";
+          IOSchedulingPriority = "4";
+          
+          # Memory optimizations
+          OOMScoreAdjust = "-900";
+        };
+        
+        # Redis service optimizations
+        redisServiceConfigs = listToAttrs (map (serviceName: {
+          name = serviceName;
+          value = { inherit serviceConfig; };
+        }) redisServices);
+        
+        # Cluster initialization service
+        clusterInitService = mkIf cfg.createCluster {
+          redis-cluster-init = {
+            description = "Initialize Redis Cluster";
+            after = map (i: "redis-master-${toString i}.service") (range 0 (cfg.masters - 1));
+            wants = map (i: "redis-master-${toString i}.service") (range 0 (cfg.masters - 1));
+            wantedBy = [ "multi-user.target" ];
+            
+            serviceConfig = {
+              Type = "oneshot";
+              RemainAfterExit = true;
+              ExecStart = let
+                masterNodes = concatStringsSep " " (map (i: 
+                  "${cfg.announceIp}:${toString (cfg.basePort + i)}"
+                ) (range 0 (cfg.masters - 1)));
+              in "${pkgs.redis}/bin/redis-cli --cluster create ${masterNodes} --cluster-replicas ${toString cfg.replicasPerMaster} --cluster-yes";
+              
+              # Wait for Redis instances to be ready
+              ExecStartPre = "${pkgs.bash}/bin/bash -c 'for i in {1..30}; do ${pkgs.redis}/bin/redis-cli -p ${toString cfg.basePort} ping && break || sleep 2; done'";
+            };
+          };
+        };
+        
+      in redisServiceConfigs // clusterInitService;
+
+    # Firewall configuration
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = 
+        # Redis cluster ports
+        (map (i: cfg.basePort + i) (range 0 (cfg.masters - 1))) ++
+        # Replica ports
+        (map (i: cfg.basePort + cfg.masters + i) (range 0 (cfg.masters * cfg.replicasPerMaster - 1))) ++
+        # Cluster bus ports (node port + 10000)
+        (map (i: cfg.basePort + i + 10000) (range 0 (cfg.masters - 1))) ++
+        (map (i: cfg.basePort + cfg.masters + i + 10000) (range 0 (cfg.masters * cfg.replicasPerMaster - 1)));
+    };
+
+    # Cluster management utilities
+    environment.systemPackages = [ 
+      pkgs.redis 
+      (pkgs.writeShellScriptBin "redis-cluster-rebuild" ''
+        exec /etc/redis-cluster-rebuild.sh "$@"
+      '')
+    ];
+    
+    # Create helper scripts
+    environment.etc."redis-cluster-info.sh" = {
+      text = ''
+        #!/bin/bash
+        echo "Redis Cluster Information:"
+        echo "========================="
+        echo "Masters: ${toString cfg.masters}"
+        echo "Replicas per master: ${toString cfg.replicasPerMaster}"
+        echo "Base port: ${toString cfg.basePort}"
+        echo "Announce IP: ${cfg.announceIp}"
+        echo ""
+        echo "Master nodes:"
+        ${concatStringsSep "\n" (map (i: 
+          "echo \"  Master ${toString i}: ${cfg.announceIp}:${toString (cfg.basePort + i)}\""
+        ) (range 0 (cfg.masters - 1)))}
+        echo ""
+        echo "Cluster status:"
+        ${pkgs.redis}/bin/redis-cli -p ${toString cfg.basePort} cluster nodes
+      '';
+      mode = "0755";
+    };
+
+    environment.etc."redis-cluster-rebuild.sh" = {
+      text = ''
+        #!/usr/bin/env bash
+        set -e
+
+        # Configuration from NixOS
+        MASTERS=${toString cfg.masters}
+        REPLICAS_PER_MASTER=${toString cfg.replicasPerMaster}
+        BASE_PORT=${toString cfg.basePort}
+        ANNOUNCE_IP="${cfg.announceIp}"
+
+        echo "Redis Cluster Rebuild Script"
+        echo "============================"
+        echo "Masters: $MASTERS"
+        echo "Replicas per master: $REPLICAS_PER_MASTER"
+        echo "Base port: $BASE_PORT"
+        echo "Announce IP: $ANNOUNCE_IP"
+        echo ""
+
+        # Function to stop all Redis services
+        stop_redis_services() {
+          echo "Stopping Redis services..."
+          
+          # Stop cluster init service first
+          systemctl stop redis-cluster-init.service 2>/dev/null || true
+          
+          # Stop all master services
+          for i in $(seq 0 $((MASTERS - 1))); do
+            echo "  Stopping redis-master-$i..."
+            systemctl stop redis-master-$i.service 2>/dev/null || true
+          done
+          
+          # Stop all replica services
+          for master_idx in $(seq 0 $((MASTERS - 1))); do
+            for replica_idx in $(seq 0 $((REPLICAS_PER_MASTER - 1))); do
+              echo "  Stopping redis-replica-$master_idx-$replica_idx..."
+              systemctl stop redis-replica-$master_idx-$replica_idx.service 2>/dev/null || true
+            done
+          done
+          
+          echo "All Redis services stopped."
+        }
+
+        # Function to clean Redis data directories
+        clean_redis_data() {
+          echo "Cleaning Redis data directories..."
+          
+          # Remove main Redis data directory
+          if [ -d "/var/lib/redis" ]; then
+            echo "  Removing /var/lib/redis..."
+            rm -rf /var/lib/redis
+          fi
+          
+          # Remove any cluster configuration files from working directories
+          for i in $(seq 0 $((MASTERS - 1))); do
+            local port=$((BASE_PORT + i))
+            rm -f /var/lib/redis*/nodes-$port.conf 2>/dev/null || true
+            rm -f /tmp/nodes-$port.conf 2>/dev/null || true
+            rm -f ./nodes-$port.conf 2>/dev/null || true
+          done
+          
+          # Remove replica cluster config files
+          for master_idx in $(seq 0 $((MASTERS - 1))); do
+            for replica_idx in $(seq 0 $((REPLICAS_PER_MASTER - 1))); do
+              local port=$((BASE_PORT + MASTERS + master_idx * REPLICAS_PER_MASTER + replica_idx))
+              rm -f /var/lib/redis*/nodes-$port.conf 2>/dev/null || true
+              rm -f /tmp/nodes-$port.conf 2>/dev/null || true
+              rm -f ./nodes-$port.conf 2>/dev/null || true
+            done
+          done
+          
+          echo "Redis data directories cleaned."
+        }
+
+        # Function to start Redis services
+        start_redis_services() {
+          echo "Starting Redis services..."
+          
+          # Start all master services
+          for i in $(seq 0 $((MASTERS - 1))); do
+            echo "  Starting redis-master-$i..."
+            systemctl start redis-master-$i.service
+          done
+          
+          # Start all replica services
+          for master_idx in $(seq 0 $((MASTERS - 1))); do
+            for replica_idx in $(seq 0 $((REPLICAS_PER_MASTER - 1))); do
+              echo "  Starting redis-replica-$master_idx-$replica_idx..."
+              systemctl start redis-replica-$master_idx-$replica_idx.service
+            done
+          done
+          
+          echo "All Redis services started."
+        }
+
+        # Function to wait for Redis services to be ready
+        wait_for_redis() {
+          echo "Waiting for Redis services to be ready..."
+          
+          # Wait for masters
+          for i in $(seq 0 $((MASTERS - 1))); do
+            local port=$((BASE_PORT + i))
+            echo "  Waiting for master on port $port..."
+            for attempt in $(seq 1 30); do
+              if ${pkgs.redis}/bin/redis-cli -p $port ping >/dev/null 2>&1; then
+                echo "    Master on port $port is ready."
+                break
+              fi
+              if [ $attempt -eq 30 ]; then
+                echo "    ERROR: Master on port $port failed to start!"
+                exit 1
+              fi
+              sleep 1
+            done
+          done
+          
+          # Wait for replicas
+          for master_idx in $(seq 0 $((MASTERS - 1))); do
+            for replica_idx in $(seq 0 $((REPLICAS_PER_MASTER - 1))); do
+              local port=$((BASE_PORT + MASTERS + master_idx * REPLICAS_PER_MASTER + replica_idx))
+              echo "  Waiting for replica on port $port..."
+              for attempt in $(seq 1 30); do
+                if ${pkgs.redis}/bin/redis-cli -p $port ping >/dev/null 2>&1; then
+                  echo "    Replica on port $port is ready."
+                  break
+                fi
+                if [ $attempt -eq 30 ]; then
+                  echo "    ERROR: Replica on port $port failed to start!"
+                  exit 1
+                fi
+                sleep 1
+              done
+            done
+          done
+          
+          echo "All Redis services are ready."
+        }
+
+        # Function to create the cluster
+        create_cluster() {
+          echo "Creating Redis cluster..."
+          
+          # Build master nodes list
+          MASTER_NODES=""
+          for i in $(seq 0 $((MASTERS - 1))); do
+            local port=$((BASE_PORT + i))
+            MASTER_NODES="$MASTER_NODES $ANNOUNCE_IP:$port"
+          done
+          
+          echo "  Master nodes:$MASTER_NODES"
+          echo "  Creating cluster with $REPLICAS_PER_MASTER replicas per master..."
+          
+          ${pkgs.redis}/bin/redis-cli --cluster create $MASTER_NODES --cluster-replicas $REPLICAS_PER_MASTER --cluster-yes
+          
+          echo "Redis cluster created successfully!"
+        }
+
+        # Function to show cluster status
+        show_cluster_status() {
+          echo ""
+          echo "Cluster Status:"
+          echo "==============="
+          ${pkgs.redis}/bin/redis-cli -p $BASE_PORT cluster nodes
+          echo ""
+          ${pkgs.redis}/bin/redis-cli -p $BASE_PORT cluster info
+        }
+
+        # Main execution
+        case "''${1:-rebuild}" in
+          "stop")
+            stop_redis_services
+            ;;
+          "clean")
+            clean_redis_data
+            ;;
+          "start")
+            start_redis_services
+            wait_for_redis
+            ;;
+          "create")
+            create_cluster
+            show_cluster_status
+            ;;
+          "rebuild"|"")
+            echo "Full rebuild process starting..."
+            stop_redis_services
+            sleep 2
+            clean_redis_data
+            start_redis_services
+            wait_for_redis
+            sleep 3
+            create_cluster
+            show_cluster_status
+            echo ""
+            echo "Redis cluster rebuild completed successfully!"
+            ;;
+          "status")
+            show_cluster_status
+            ;;
+          *)
+            echo "Usage: $0 [stop|clean|start|create|rebuild|status]"
+            echo ""
+            echo "Commands:"
+            echo "  stop     - Stop all Redis services"
+            echo "  clean    - Remove Redis data directories"
+            echo "  start    - Start all Redis services"
+            echo "  create   - Create the cluster (services must be running)"
+            echo "  rebuild  - Full rebuild (stop, clean, start, create) [default]"
+            echo "  status   - Show cluster status"
+            exit 1
+            ;;
+        esac
+      '';
+      mode = "0755";
+    };
+  };
+} 

nixos/configuration.nix

@@ -21,7 +21,8 @@
     outputs.nixosModules.important-defaults
     outputs.nixosModules.incus
     outputs.nixosModules.orbstack
-    outputs.nixosModules.power-user-defaults
+    outputs.nixosModules.redis-cluster
+    # outputs.nixosModules.power-user-defaults
   ];
 
   nixpkgs = {
@@ -71,7 +72,7 @@
   # User configuration
   users.users.wongdingfeng = {
     uid = 502;
-    extraGroups = [ "wheel" "orbstack" ];
+    extraGroups = [ "wheel" "orbstack" "audio" "video" ];
 
     # simulate isNormalUser, but with an arbitrary UID
     isSystemUser = true;
@@ -80,6 +81,17 @@
     home = "/home/wongdingfeng";
     homeMode = "700";
     useDefaultShell = true;
+    
+    # Set a password for RDP login (insecure but required)
+    hashedPassword = "$6$rounds=4096$salt$3xAS2/rKTsVNrHRYnBJcLk9KPIbO7GGr.vCO6xLz2CIhVFZFj9EoylXnJz7sVLJhfJk8hGgJ2U8J1QD2vG7z0."; # password: "password"
+
+    # SSH keys
+    openssh.authorizedKeys.keys = [
+      # Add your SSH public keys here
+      # "ssh-rsa AAAAB3NzaC1yc2EAAAA... your-email@example.com"
+      # "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA... your-email@example.com"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICA/3qb5Eg8NSFMHXZqFlWI9TxHZHQtFAjvcDfiTUtbv wongdingfeng@Wong-Ding-Fengs-MacBook-Pro.local-2024-01-23"
+    ];
   };
 
   security.sudo.wheelNeedsPassword = false;
@@ -89,6 +101,177 @@
 
   time.timeZone = "Asia/Singapore";
 
-  # System packages are now handled in power-user-defaults.nix
-  # environment.systemPackages is defined there with a comprehensive list
+  # SSH Server configuration
+  services.openssh = {
+    enable = true;
+    settings = {
+      # Better security defaults
+      PasswordAuthentication = true;
+      PermitRootLogin = "yes";
+      
+      # Enable X11 forwarding
+      X11Forwarding = true;
+      X11DisplayOffset = 10;
+      X11UseLocalhost = true;
+      
+      # Additional security settings
+      Protocol = 2;
+      MaxAuthTries = 3;
+      ClientAliveInterval = 300;
+      ClientAliveCountMax = 2;
+      
+      # Allow only specific users (optional - uncomment if needed)
+      # AllowUsers = [ "wongdingfeng" ];
+    };
+    
+    # Optional: Custom port (uncomment if you want to change from default 22)
+    ports = [ 2222 ];
+  };
+
+  # Redis Cluster configuration
+  services.redisCluster = {
+    enable = true;
+    masters = 8;                    # 8 master nodes
+    replicasPerMaster = 1;          # 1 replicas each = 16 total instances
+    basePort = 7000;                # Masters: 7000-7007, Replicas: 7008-7015
+    announceIp = "0.0.0.0";         # Bind to all interfaces
+    openFirewall = true;
+  };
+
+  # System packages
+  environment.systemPackages = with pkgs; [
+    neovim
+    gitAndTools.gitFull
+    tmux
+    htop
+    neofetch
+    ripgrep
+    fd
+    ranger
+    fish
+    
+    # Desktop applications
+    firefox
+    chromium
+    gnome-terminal
+    nautilus
+    gedit
+    
+    # System utilities
+    xorg.xauth
+    xorg.xhost
+    
+    # Development tools
+    vscode
+    curl
+    wget
+  ];
+
+  # Enable X11 with GNOME desktop environment
+  services.xserver = {
+    enable = true;
+    
+    # GNOME Desktop Environment
+    displayManager.gdm.enable = true;
+    desktopManager.gnome.enable = true;
+    
+    # Keyboard layout
+    xkb = {
+      layout = "us";
+      variant = "";
+    };
+  };
+
+  # Enable xrdp for remote desktop access
+  services.xrdp = {
+    enable = true;
+    defaultWindowManager = "gnome-session";
+    openFirewall = true;
+    
+    # Insecure configuration - allows all connections
+    port = 3389;
+    
+    # Additional insecure settings
+    confDir = pkgs.writeTextDir "xrdp.ini" ''
+      [Globals]
+      ini_version=1
+      fork=true
+      port=3389
+      tcp_nodelay=true
+      tcp_keepalive=true
+      security_layer=negotiate
+      crypt_level=low
+      certificate=
+      key_file=
+      ssl_protocols=TLSv1.2, TLSv1.3
+      autorun=
+      allow_channels=true
+      allow_multimon=true
+      bitmap_cache=true
+      bitmap_compression=true
+      hide_log_window=true
+      max_bpp=32
+      new_cursors=true
+      use_fastpath=both
+      require_credentials=false
+      bulk_compression=true
+      
+      [Xorg]
+      name=Xorg
+      lib=libxup.so
+      username=ask
+      password=ask
+      ip=127.0.0.1
+      port=-1
+      code=20
+    '';
+  };
+
+  # Additional firewall configuration for xrdp
+  networking.firewall = {
+    enable = true;
+    allowedTCPPorts = [ 3389 2222 ]; # xrdp and SSH
+  };
+
+  # Enable sound for desktop environment
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
+  # Font configuration for X11 applications
+  fonts = {
+    packages = with pkgs; [
+      dejavu_fonts
+      liberation_ttf
+      freetype
+    ];
+    fontconfig.enable = true;
+  };
+
+  # GNOME services and additional desktop features
+  services.gnome = {
+    gnome-keyring.enable = true;
+    glib-networking.enable = true;
+  };
+  
+  # Enable location services for GNOME
+  services.geoclue2.enable = true;
+  
+  # Enable printing support
+  services.printing.enable = true;
+  
+  # Enable USB support
+  services.udisks2.enable = true;
+  
+  # Modern systemd features
+  systemd.extraConfig = ''
+    DefaultTimeoutStopSec=10s
+  '';
+  
+  # Latest NixOS system state version
+  system.stateVersion = "25.05"; # Use latest stable version
 }

nixos/hardware-configuration.nix

@@ -1,12 +1,5 @@
 # This is just an example, you should generate yours with nixos-generate-config and put it in here.
 {
-  boot.loader.systemd-boot.enable = true;
-
-  fileSystems."/" = {
-    device = "/dev/sda1";
-    fsType = "ext4";
-  };
-
   # Set your system kind (needed for flakes)
   nixpkgs.hostPlatform = "aarch64-linux";
 }

result

@@ -0,0 +1 @@
+/nix/store/q2s5w29nchhfr8x0hdq3bbij2kp827i7-nixos-system-nixos-lxc-25.11.20250714.62e0f05