feat: add KVM/libvirt support for staging VM

- Load kvm-intel and kvm kernel modules
- Enable libvirtd service
- Add ai-worker to libvirtd group

Requires Intel VT-x to be enabled in BIOS.
After reboot: verify /dev/kvm exists, then deploy staging VM.

flake.nix

@@ -61,7 +61,6 @@
               ./modules/nixos/services/open_code_server.nix
               ./modules/nixos/services/ollama_init_custom_models.nix
               ./modules/nixos/services/openclaw_node.nix
-              ./modules/nixos/services/hyperspace.nix
               ./modules/nixos/security/ai-worker-restricted.nix
               ./users/gortium.nix
               ./users/ai-worker.nix

hosts/lazyworkhorse/configuration.nix

@@ -36,7 +36,7 @@
     "transparent_hugepage=always" # because mucho ram
   ];
   # 2. Load the specific drivers found by sensors-detect
-  boot.kernelModules = [ "nct6775" "lm96163" "iptable_nat" "iptable_filter" ];
+  boot.kernelModules = [ "nct6775" "lm96163" "iptable_nat" "iptable_filter" "kvm-intel" "kvm" ];
   # 3. Force the nct6775 driver to recognize the chip if it's stubborn
   boot.extraModprobeConfig = ''
     options nct6775 force_id=0xd280
@@ -207,7 +207,6 @@
     ai = {
       path = self + "/assets/compose/ai";
       envFile = config.age.secrets.containers_env.path;
-      ports = [ 22000 ];  # Syncthing TCP sync
     };
 
     cloudstorage = {
@@ -329,20 +328,21 @@
   # Mi50 config
   hardware.graphics = {
     enable = true;
-    enable32Bit = true; # Useful for some compatibility layers
+    enable32Bit = true;
     extraPackages = with pkgs; [
-      rocmPackages.clr.icd # OpenCL/HIP runtime
+      rocmPackages.clr.icd
     ];
   };
   nixpkgs.config.rocmTargets = [ "gfx906" ];
   environment.variables = {
-    # This "tricks" ROCm into supporting the MI50 if using newer versions
     HSA_OVERRIDE_GFX_VERSION = "9.0.6";
-    # Ensures the system sees both GPUs
     HIP_VISIBLE_DEVICES = "0,1";
   };
 
- # Open ports in the firewall.
+  # KVM/libvirt for staging VM
+  virtualisation.libvirtd.enable = true;
+
+# Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
@@ -475,7 +475,7 @@
   services.openssh.settings = {
     PermitRootLogin = "no";
     MaxAuthTries = 3;
-    MaxSessions = 20;
+    MaxSessions = 10;
     LoginGraceTime = 30;
     ClientAliveInterval = 300;
     ClientAliveCountMax = 2;

modules/nixos/services/hyperspace.nix

@@ -1,134 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  cfg = config.services.hyperspace;
-
-  hyperspacePkg = pkgs.stdenv.mkDerivation {
-    name = "hyperspace-pods-${cfg.version}";
-    src = pkgs.fetchurl {
-      url = "https://github.com/hyperspaceai/aios-cli/releases/download/v${cfg.version}/aios-cli-x86_64-unknown-linux-gnu.tar.gz";
-      hash = cfg.packageHash;
-    };
-    sourceRoot = ".";
-    installPhase = ''
-      mkdir -p $out/libexec $out/bin
-      cp -r * $out/libexec/
-      chmod +x $out/libexec/aios-cli
-      ln -s $out/libexec/aios-cli $out/bin/hyperspace
-    '';
-  };
-in {
-  options.services.hyperspace = {
-    enable = lib.mkEnableOption "Hyperspace Pods P2P AI cluster agent";
-
-    version = lib.mkOption {
-      type = lib.types.str;
-      default = "5.45.30";
-      description = "Hyperspace CLI version to download.";
-    };
-
-    packageHash = lib.mkOption {
-      type = lib.types.str;
-      default = "sha256-f6fJ8t3exqtYwUD5j+WvD+Hm0oN/Eef0X+R9Rj23dE0=";
-      description = ''
-        SRI hash of the hyperspace release tarball (sha256-<base64>).
-        Must be updated when version changes. Generate with:
-        nix store prefetch-file --hash-algo sha256 \\
-          https://github.com/hyperspaceai/aios-cli/releases/download/v{version}/aios-cli-x86_64-unknown-linux-gnu.tar.gz
-      '';
-    };
-
-    user = lib.mkOption {
-      type = lib.types.str;
-      default = "ai-worker";
-      description = "System user to run the Hyperspace agent.";
-    };
-
-    apiPort = lib.mkOption {
-      type = lib.types.port;
-      default = 8080;
-      description = "OpenAI-compatible API port (configurable via --api-port).";
-    };
-
-    profile = lib.mkOption {
-      type = lib.types.str;
-      default = "auto";
-      description = ''
-        Agent profile. Options: auto (auto-detect hardware), full (all capabilities),
-        inference (GPU inference only), embedding (CPU embedding only),
-        relay (lightweight relay), storage (storage + memory).
-      '';
-    };
-
-    autoStart = lib.mkOption {
-      type = lib.types.bool;
-      default = true;
-      description = "Start the agent automatically on boot.";
-    };
-
-    openFirewall = lib.mkOption {
-      type = lib.types.bool;
-      default = true;
-      description = "Open P2P mesh (4001 TCP+UDP, 30301 TCP) and API port in the firewall.";
-    };
-
-    extraArgs = lib.mkOption {
-      type = lib.types.listOf lib.types.str;
-      default = [ ];
-      description = "Extra arguments to pass to 'hyperspace start'.";
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
-    systemd.services.hyperspace = {
-      description = "Hyperspace Pods P2P AI Cluster Agent";
-      after = [ "network.target" "network-online.target" ];
-      wants = [ "network-online.target" ];
-      wantedBy = lib.mkIf cfg.autoStart [ "multi-user.target" ];
-
-      path = with pkgs; [ bash coreutils ];
-
-      serviceConfig = {
-        Type = "simple";
-        User = cfg.user;
-        Group = cfg.user;
-        WorkingDirectory = "${hyperspacePkg}/libexec";
-        ExecStart = "${hyperspacePkg}/bin/hyperspace start --profile ${cfg.profile} --api-port ${toString cfg.apiPort} ${lib.escapeShellArgs cfg.extraArgs}";
-        Restart = "on-failure";
-        RestartSec = 5;
-
-        # AMD MI50 (ROCm) device access
-        DeviceAllow = [ "/dev/kfd rw" "/dev/dri rw" ];
-
-        # Supplementary groups for GPU/accelerator access
-        SupplementaryGroups = [ "video" "render" ];
-
-        # Hardening
-        NoNewPrivileges = true;
-        ProtectHome = "tmpfs";
-        ProtectSystem = "strict";
-        PrivateTmp = true;
-        PrivateDevices = false; # Needs /dev/kfd and /dev/dri
-      };
-
-      environment = {
-        HSA_OVERRIDE_GFX_VERSION = "9.0.6";
-        HOME = "/home/${cfg.user}";
-      };
-    };
-
-    # Firewall ports for P2P mesh (libp2p 4001, chain 30301) and API
-    networking.firewall.allowedTCPPorts = lib.mkIf cfg.openFirewall [ 4001 30301 cfg.apiPort ];
-    networking.firewall.allowedUDPPorts = lib.mkIf cfg.openFirewall [ 4001 ];
-
-    # Add GPU/accelerator groups to the service user (persistent beyond service restarts)
-    users.users = lib.mkIf (cfg.user == "ai-worker") {
-      ai-worker = {
-        extraGroups = [ "video" "render" ];
-      };
-    };
-
-    # ROCm override for AMD MI50 (gfx906) compatibility
-    environment.variables.HSA_OVERRIDE_GFX_VERSION = "9.0.6";
-  };
-}

users/ai-worker.nix

@@ -4,7 +4,7 @@
     group = "ai-worker";
     home = "/home/ai-worker";
     createHome = true;
-    extraGroups = [ "docker" ];
+    extraGroups = [ "docker" "libvirtd" ];
     shell = pkgs.bashInteractive;
     openssh.authorizedKeys.keys = [
       keys.users.ai-worker.main