Create module for vmdev

modules/nixos/default.nix

@@ -17,6 +17,7 @@
 		./rpi4.nix
 		./sway.nix
 		./tailscale.nix
+		./vmdev.nix
 	];
 
 	environment.systemPackages = with pkgs; [

modules/nixos/vmdev.nix

@@ -0,0 +1,73 @@
+{ pkgs, lib, config, ... }:
+
+let
+	cfg = config.greg.vmdev;
+in with lib;
+{
+	options = {
+		greg.vmdev = {
+			enable = mkEnableOption "Enable this system for VM development work";
+			user = mkOption {
+				default = "greg";
+				type = types.str;
+				description = "The user who will be doing VM dev";
+			};
+			system = mkOption {
+				default = "amd";
+				type = types.str;
+				description = "Kernel module type to install - amd, intel, etc";
+			};
+		};
+	};
+
+	config = mkIf cfg.enable {
+		environment.systemPackages = with pkgs; [
+			dmidecode
+			guestfs-tools
+			libguestfs
+			OVMFFull
+			packer
+			virt-manager
+			xorriso
+		];
+
+		users.users."${cfg.user}".extraGroups = [ "libvirtd" ];
+
+		# Enable the virtualisation services
+		virtualisation = {
+			libvirtd = {
+				enable = true;
+				onBoot = "ignore";  # Do not auto-restart VMs on boot, unless they are marked autostart
+				qemu.ovmf.enable = true;
+			};
+
+			virtualbox.host = {
+				enable = true;
+				enableExtensionPack = true;
+			};
+		};
+
+		# Configuration for vbox user performance
+		users.extraGroups.vboxusers.members = [ cfg.user ];
+
+		boot.extraModprobeConfig = "options kvm_${cfg.system} nested=1";
+
+		# Configure the services more
+		systemd.services = {
+			libvirtd = {
+				preStart = "${pkgs.kmod}/bin/modprobe kvm_${cfg.system}";
+				postStop = "${pkgs.kmod}/bin/rmmod kvm_${cfg.system} kvm";
+				conflicts = [ "vbox.service" ];
+			};
+			vbox = {
+				preStart = "${pkgs.kmod}/bin/modprobe vboxdrv vboxnetadp vboxnetflt";
+				postStop = "${pkgs.kmod}/bin/rmmod vboxnetadp vboxnetflt vboxdrv";
+				conflicts = [ "libvirtd.service" ];
+				unitConfig = {
+					Type = "oneshot";
+					RemainAfterExit = "yes";
+				};
+			};
+		};
+	};
+}