nixpkgs/nixos/modules/virtualisation/virtualbox-host.nix
Florian Klink 32fd88726b nixos/virtualbox: fix systemd-networkd-wait-online.service waiting for vboxnet0
While switching NixOS configurations with both

networking.useNetworkd = true;
virtualisation.virtualbox.host.enable;

You often end up waiting for systemd-networkd-wait-online.service.

This happens because the vboxnet0 device doesn't have a carrier until
virtualbox machines are started, so networkd gets stuck in
"Configuring":

⇒  networkctl list
IDX LINK          TYPE      OPERATIONAL SETUP
  1 lo            loopback  carrier     unmanaged
  2 wlp2s0        wlan      routable    unmanaged
  3 vboxnet0      ether     no-carrier  configuring

This updates the NixOS virtualbox host module to include a
RequiredForOnline=no statement in the generated 40-vboxnet0.network
file, so networkd doesn't consider it necessary for
systemd-networkd-wait-online.service to finish.
2019-10-26 00:45:42 +02:00

161 lines
5.4 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.virtualisation.virtualbox.host;
virtualbox = cfg.package.override {
inherit (cfg) enableHardening headless;
extensionPack = if cfg.enableExtensionPack then pkgs.virtualboxExtpack else null;
};
kernelModules = config.boot.kernelPackages.virtualbox.override {
inherit virtualbox;
};
in
{
options.virtualisation.virtualbox.host = {
enable = mkEnableOption "VirtualBox" // {
description = ''
Whether to enable VirtualBox.
<note><para>
In order to pass USB devices from the host to the guests, the user
needs to be in the <literal>vboxusers</literal> group.
</para></note>
'';
};
enableExtensionPack = mkEnableOption "VirtualBox extension pack" // {
description = ''
Whether to install the Oracle Extension Pack for VirtualBox.
<important><para>
You must set <literal>nixpkgs.config.allowUnfree = true</literal> in
order to use this. This requires you accept the VirtualBox PUEL.
</para></important>
'';
};
package = mkOption {
type = types.package;
default = pkgs.virtualbox;
defaultText = "pkgs.virtualbox";
description = ''
Which VirtualBox package to use.
'';
};
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.
<important><para>
Disabling this can put your system's security at risk, as local users
in the vboxusers group can tamper with the VirtualBox device files.
</para></important>
'';
};
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 [{
warnings = mkIf (config.nixpkgs.config.virtualbox.enableExtensionPack or false)
["'nixpkgs.virtualbox.enableExtensionPack' has no effect, please use 'virtualisation.virtualbox.host.enableExtensionPack'"];
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"
"VirtualBoxVM"
]));
users.groups.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"];
}) (mkIf config.networking.useNetworkd {
systemd.network.networks."40-vboxnet0".extraConfig = ''
[Link]
RequiredForOnline=no
'';
})
]);
}