132 lines
4.4 KiB
Nix
132 lines
4.4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.virtualisation.virtualbox.host;
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virtualbox = pkgs.virtualbox.override {
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inherit (cfg) enableHardening headless;
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};
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kernelModules = config.boot.kernelPackages.virtualbox.override {
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inherit virtualbox;
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};
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in
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{
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options.virtualisation.virtualbox.host = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable VirtualBox.
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<note><para>
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In order to pass USB devices from the host to the guests, the user
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needs to be in the <literal>vboxusers</literal> group.
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</para></note>
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'';
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};
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addNetworkInterface = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Automatically set up a vboxnet0 host-only network interface.
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'';
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};
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enableHardening = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Enable hardened VirtualBox, which ensures that only the binaries in the
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system path get access to the devices exposed by the kernel modules
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instead of all users in the vboxusers group.
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<important><para>
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Disabling this can put your system's security at risk, as local users
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in the vboxusers group can tamper with the VirtualBox device files.
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</para></important>
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'';
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};
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headless = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Use VirtualBox installation without GUI and Qt dependency. Useful to enable on servers
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and when virtual machines are controlled only via SSH.
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'';
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};
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};
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config = mkIf cfg.enable (mkMerge [{
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boot.kernelModules = [ "vboxdrv" "vboxnetadp" "vboxnetflt" ];
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boot.extraModulePackages = [ kernelModules ];
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environment.systemPackages = [ virtualbox ];
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security.wrappers = let
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mkSuid = program: {
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source = "${virtualbox}/libexec/virtualbox/${program}";
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owner = "root";
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group = "vboxusers";
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setuid = true;
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};
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in mkIf cfg.enableHardening
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(builtins.listToAttrs (map (x: { name = x; value = mkSuid x; }) [
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"VBoxHeadless"
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"VBoxNetAdpCtl"
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"VBoxNetDHCP"
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"VBoxNetNAT"
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"VBoxSDL"
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"VBoxVolInfo"
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"VirtualBox"
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]));
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users.extraGroups.vboxusers.gid = config.ids.gids.vboxusers;
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services.udev.extraRules =
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''
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KERNEL=="vboxdrv", OWNER="root", GROUP="vboxusers", MODE="0660", TAG+="systemd"
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KERNEL=="vboxdrvu", OWNER="root", GROUP="root", MODE="0666", TAG+="systemd"
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KERNEL=="vboxnetctl", OWNER="root", GROUP="vboxusers", MODE="0660", TAG+="systemd"
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SUBSYSTEM=="usb_device", ACTION=="add", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}"
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SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}"
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SUBSYSTEM=="usb_device", ACTION=="remove", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor"
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SUBSYSTEM=="usb", ACTION=="remove", ENV{DEVTYPE}=="usb_device", RUN+="${virtualbox}/libexec/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor"
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'';
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# Since we lack the right setuid/setcap binaries, set up a host-only network by default.
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} (mkIf cfg.addNetworkInterface {
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systemd.services."vboxnet0" =
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{ description = "VirtualBox vboxnet0 Interface";
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requires = [ "dev-vboxnetctl.device" ];
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after = [ "dev-vboxnetctl.device" ];
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wantedBy = [ "network.target" "sys-subsystem-net-devices-vboxnet0.device" ];
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path = [ virtualbox ];
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serviceConfig.RemainAfterExit = true;
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serviceConfig.Type = "oneshot";
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serviceConfig.PrivateTmp = true;
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environment.VBOX_USER_HOME = "/tmp";
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script =
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''
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if ! [ -e /sys/class/net/vboxnet0 ]; then
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VBoxManage hostonlyif create
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cat /tmp/VBoxSVC.log >&2
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fi
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'';
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postStop =
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''
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VBoxManage hostonlyif remove vboxnet0
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'';
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};
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networking.interfaces.vboxnet0.ip4 = [ { address = "192.168.56.1"; prefixLength = 24; } ];
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# Make sure NetworkManager won't assume this interface being up
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# means we have internet access.
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networking.networkmanager.unmanaged = ["vboxnet0"];
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})]);
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}
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