{ config, lib, pkgs, ... }: with lib; let cfg = config.virtualisation.virtualbox.host; virtualbox = pkgs.virtualbox.override { inherit (cfg) enableExtensionPack enableHardening headless; }; kernelModules = config.boot.kernelPackages.virtualbox.override { inherit virtualbox; }; in { options.virtualisation.virtualbox.host = { enable = mkEnableOption "VirtualBox" // { description = '' Whether to enable VirtualBox. In order to pass USB devices from the host to the guests, the user needs to be in the vboxusers group. ''; }; enableExtensionPack = mkEnableOption "VirtualBox extension pack"; addNetworkInterface = mkOption { type = types.bool; default = true; description = '' Automatically set up a vboxnet0 host-only network interface. ''; }; enableHardening = mkOption { type = types.bool; default = true; description = '' Enable hardened VirtualBox, which ensures that only the binaries in the system path get access to the devices exposed by the kernel modules instead of all users in the vboxusers group. Disabling this can put your system's security at risk, as local users in the vboxusers group can tamper with the VirtualBox device files. ''; }; headless = mkOption { type = types.bool; default = false; description = '' Use VirtualBox installation without GUI and Qt dependency. Useful to enable on servers and when virtual machines are controlled only via SSH. ''; }; }; config = mkIf cfg.enable (mkMerge [{ boot.kernelModules = [ "vboxdrv" "vboxnetadp" "vboxnetflt" ]; boot.extraModulePackages = [ kernelModules ]; environment.systemPackages = [ virtualbox ]; security.wrappers = let mkSuid = program: { source = "${virtualbox}/libexec/virtualbox/${program}"; owner = "root"; group = "vboxusers"; setuid = true; }; in mkIf cfg.enableHardening (builtins.listToAttrs (map (x: { name = x; value = mkSuid x; }) [ "VBoxHeadless" "VBoxNetAdpCtl" "VBoxNetDHCP" "VBoxNetNAT" "VBoxSDL" "VBoxVolInfo" "VirtualBox" ])); users.extraGroups.vboxusers.gid = config.ids.gids.vboxusers; services.udev.extraRules = '' KERNEL=="vboxdrv", OWNER="root", GROUP="vboxusers", MODE="0660", TAG+="systemd" KERNEL=="vboxdrvu", OWNER="root", GROUP="root", MODE="0666", TAG+="systemd" KERNEL=="vboxnetctl", OWNER="root", GROUP="vboxusers", MODE="0660", TAG+="systemd" SUBSYSTEM=="usb_device", ACTION=="add", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}" SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}" SUBSYSTEM=="usb_device", ACTION=="remove", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor" SUBSYSTEM=="usb", ACTION=="remove", ENV{DEVTYPE}=="usb_device", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor" ''; # Since we lack the right setuid/setcap binaries, set up a host-only network by default. } (mkIf cfg.addNetworkInterface { systemd.services."vboxnet0" = { description = "VirtualBox vboxnet0 Interface"; requires = [ "dev-vboxnetctl.device" ]; after = [ "dev-vboxnetctl.device" ]; wantedBy = [ "network.target" "sys-subsystem-net-devices-vboxnet0.device" ]; path = [ virtualbox ]; serviceConfig.RemainAfterExit = true; serviceConfig.Type = "oneshot"; serviceConfig.PrivateTmp = true; environment.VBOX_USER_HOME = "/tmp"; script = '' if ! [ -e /sys/class/net/vboxnet0 ]; then VBoxManage hostonlyif create cat /tmp/VBoxSVC.log >&2 fi ''; postStop = '' VBoxManage hostonlyif remove vboxnet0 ''; }; networking.interfaces.vboxnet0.ipv4.addresses = [{ address = "192.168.56.1"; prefixLength = 24; }]; # Make sure NetworkManager won't assume this interface being up # means we have internet access. networking.networkmanager.unmanaged = ["vboxnet0"]; })]); }