{ config, lib, pkgs, ... }: with lib; let cfg = config.virtualisation.virtualbox.host; virtualbox = pkgs.virtualbox.override { inherit (cfg) enableHardening headless; }; kernelModules = config.boot.kernelPackages.virtualbox.override { inherit virtualbox; }; in { options.virtualisation.virtualbox.host = { enable = mkOption { type = types.bool; default = false; 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. ''; }; 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.setuidOwners = let mkSuid = program: { inherit program; source = "${virtualbox}/libexec/virtualbox/${program}"; owner = "root"; group = "vboxusers"; setuid = true; }; in mkIf cfg.enableHardening (map mkSuid [ "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 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.ip4 = [ { 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"]; })]); }