node-virtualbox

A JavaScript library to interact with VirtualBox virtual machines.

Table of Contents

• Installation
• Controlling Power and State
  • Starting a cold machine: Two ways
  • Stopping a machine
  • Pausing, Saving and Resuming a machine
• Controlling the guest OS
  • A note about security :warning:
  • Running programs in the guest
    • Executing commands as Administrators on Windows guests
  • Killing programs in the guest
  • Sending keystrokes to a virtual machine
• Meta information about machine
• Putting it all together
• Available Methods
• Troubleshooting
• More Examples
• License (MIT)
• Contributing

Installation

Obtain the package

$ npm install virtualbox [--save] [-g]

and then use it

var virtualbox = require('virtualbox');

The general formula for commands is:

virtualbox. API command ( "registered vm name", [parameters], callback );

Available API commands are listed at the end of this document.

Controlling Power and State

node-virtualbox provides convenience methods to command the guest machine's power state in the customary ways.

Starting a cold machine: Two ways

Virtual machines will start headless by default, but you can pass a boolean parameter to start them with a GUI:

virtualbox.start("machine_name", true, function start_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine has started WITH A GUI!");
});

So as not to break pre-0.1.0 implementations, the old method still works (which also defaults to headless):

virtualbox.start("machine_name", function start_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine has started HEADLESS!");
});

Stopping a machine

Note: For historical reasons, .stop is an alias to .savestate.

virtualbox.stop("machine_name", function stop_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine has been saved");
});

To halt a machine completely, you can use poweroff or acpipowerbutton:

virtualbox.poweroff("machine_name", function poweroff_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine has been powered off!");
});

virtualbox.acpipowerbutton("machine_name", function acpipower_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine's ACPI power button was pressed.");
});

Pausing, Saving and Resuming a machine

Noting the caveat above that .stop is actually an alias to .savestate...

virtualbox.pause("machine_name", function pause_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine is now paused!");
});

virtualbox.savestate("machine_name", function save_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine is now paused!");
});

And, in the same family, acpisleepbutton:

virtualbox.acpisleepbutton("machine_name", function acpisleep_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine's ACPI sleep button signal was sent.");
});

Note that you should probably resume a machine which is in one of the above three states.

virtualbox.resume("machine_name", function resume_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine is now paused!");
});

And, of course, a reset button method:

virtualbox.reset("machine_name", function reset_callback(error) {
  if (error) throw error;
  console.log("Virtual Machine's reset button was pressed!");
});

Export a machine

You can export with export method:

virtualbox.export("machine_name", "output", function export_callback(error) {
  if(error) throw error;
  console.log("Virtual Machine was exported!");
});

Snapshot Manage

You can show snapshot list with snapshotList method:

virtualbox.snapshotList("machine_name", function(error, snapshotList, currentSnapshotUUID) {
  if(error) throw error;
  if(snapshotList) {
    console.log(JSON.stringify(snapshotList), JSON.stringify(currentSnapshotUUID));
  }
});

And, you can take a snapshot:

virtualbox.snapshotTake("machine_name", "snapshot_name", function(error, uuid) {
  if (error) throw error;
	console.log('Snapshot has been taken!');
	console.log('UUID: ', uuid);
});

Or, delete a snapshot:

virtualbox.snapshotDelete("machine_name", "snapshot_name", function(error) {
  if (error) throw error;
	console.log('Snapshot has been deleted!');
});

Or, restore a snapshot:

virtualbox.snapshotRestore("machine_name", "snapshot_name", function(error) {
  if (error) throw error;
	console.log('Snapshot has been restored!');
});

Controlling the guest OS

A note about security :warning:

node-virtualbox is not opinionated: we believe that you know best what you need to do with your virtual machine. Maybe that includes issuing sudo rm -rf / for some reason.

To that end, the virtualbox APIs provided by this module take absolutely no steps to prevent you shooting yourself in the foot.

:warning: Therefore, if you accept user input and pass it to the virtual machine, you should take your own steps to filter input before it gets passed to virtualbox.

For more details and discussion, see issue #29.

Running programs in the guest

This method takes an options object with the name of the virtual machine, the path to the binary to be executed and any parameters to pass:

var options = {
  vm: "machine_name",
  cmd: "C:\\Program Files\\Internet Explorer\\iexplore.exe",
  params: "https://google.com"
}

virtualbox.exec(options, function exec_callback(error, stdout) {
    if (error) throw error;
    console.log('Started Internet Explorer...');
});

Executing commands as Administrators on Windows guests

Pass username and password information in an options object:

var options = {
  vm: "machine_name",
  user:"Administrator",
  password: "123456",
  cmd: "C:\\Program Files\\Internet Explorer\\iexplore.exe",
  params: "https://google.com"
};

Killing programs in the guest

Tasks can be killed in the guest as well. In Windows guests this calls taskkill.exe /im and on Linux, BSD and OS X (Darwin) guests, it calls sudo killall:

virtualbox.kill({
    vm: "machine_name",
    cmd: "iexplore.exe"
}, function kill_callback(error) {
    if (error) throw error;
    console.log('Terminated Internet Explorer.');
});

Sending keystrokes to a virtual machine

Keyboard scan code sequences can be piped directly to a virtual machine's console:

var SCAN_CODES = virtualbox.SCAN_CODES;
var sequence = [
  { key: 'SHIFT', type: 'make',  code: SCAN_CODES['SHIFT']},
  { key: 'A',     type: 'make',  code: SCAN_CODES['A']},
  { key: 'SHIFT', type: 'break', code: SCAN_CODES.getBreakCode('SHIFT')},
  { key: 'A',     type: 'break', code: SCAN_CODES.getBreakCode('A')}
];

virtualbox.keyboardputscancode("machine_name", sequence, function keyscan_callback(err) {
    if (error) throw error;
    console.log('Sent SHIFT A');
});

Meta information about machine

List all registered machines, returns an array:

virtualbox.list(function list_callback(machines, error) {
  if (error) throw error;
  // Act on machines
});

Obtaining a guest property by key name:

var options = {
  vm: "machine_name",
  key: "/VirtualBox/GuestInfo/Net/0/V4/IP"
}

virtualbox.guestproperty(function guestproperty_callback(machines, error) {
  if (error) throw error;
  // Act on machines
});

Obtaining an extra property by key name:

var options = {
  vm: "machine_name",
  key: "GUI/Fullscreen"
}

virtualbox.extradata.get(options, function extradataget_callback(error, value) {
  if (error) throw error;
  console.log('Virtual Machine "%s" extra "%s" value is "%s"', options.vm, options.key, value);
});

Writing an extra property by key name:

var options = {
  vm: "machine_name",
  key: "GUI/Fullscreen",
  value: "true"
}

virtualbox.extradata.set(options, function extradataset_callback(error) {
  if (error) throw error;
  console.log('Set Virtual Machine "%s" extra "%s" value to "%s"', options.vm, options.key, options.value);
});

Putting it all together

var virtualbox = require('virtualbox');

virtualbox.start("machine_name", function start_callback(error) {

    if (error) throw error;

    console.log('VM "w7" has been successfully started');

    virtualbox.exec({
        vm: "machine_name",
        cmd: "C:\\Program Files\\Internet Explorer\\iexplore.exe",
        params: "http://google.com"
    }, function (error) {

        if (error) throw error;
        console.log('Running Internet Explorer...');

    });

});

Available Methods

virtualbox

• .pause({vm:"machine_name"}, callback)
• .reset({vm:"machine_name"}, callback)
• .resume({vm:"machine_name"}, callback)
• .start({vm:"machine_name"}, callback) and .start({vm:"machine_name"}, true, callback)
• .stop({vm:"machine_name"}, callback)
• .savestate({vm:"machine_name"}, callback)
• .export({vm:"machine_name"}, {output: "output"}, callback)
• .poweroff({vm:"machine_name"}, callback)
• .acpisleepbutton({vm:"machine_name"}, callback)
• .acpipowerbutton({vm:"machine_name"}, callback)
• .guestproperty({vm:"machine_name", property: "propname"}, callback)
• .exec(){vm: "machine_name", cmd: "C:\\Program Files\\Internet Explorer\\iexplore.exe", params: "http://google.com"}, callback)
• .exec(){vm: "machine_name", user:"Administrator", password: "123456", cmd: "C:\\Program Files\\Internet Explorer\\iexplore.exe", params: "http://google.com"}, callback)
• .keyboardputscancode("machine_name", [scan_codes], callback)
• .kill({vm:"machine_name"}, callback)
• .list(callback)
• .isRunning({vm:"machine_name"}, callback)
• .snapshotList({vm:"machine_name"}, callback)
• .snapshotTake({vm:"machine_name"}, {vm:"snapshot_name"}, callback)
• .snapshotDelete({vm:"machine_name"}, {vm:"snapshot_UUID"}, callback)
• .snapshotRestore({vm:"machine_name"}, {vm:"snapshot_UUID"}, callback)
• .extradata.get({vm:"machine_name", key:"keyname"}, callback)
• .extradata.set({vm:"machine_name", key:"keyname", value:"val"}, callback)

Troubleshooting

• Make sure that Guest account is enabled on the VM.
• Make sure your linux guest can sudo with NOPASSWD (at least for now).
• VMs start headlessly by default: if you're having trouble with executing a command, start the VM with GUI and observe the screen after executing same command.
• To avoid having "Concurrent guest process limit is reached" error message, execute your commands as an administrator.
• Don't forget that this whole thing is asynchronous, and depends on the return of vboxmanage not the actual running state/runlevel of services within the guest. See https://github.com/Node-Virtualization/node-virtualbox/issues/9

More Examples

• npm tests

License

MIT

Contributing

Please do!

• File an issue
• Fork and send a pull request.

Please abide by the Contributor Code of Conduct.