docs/machine/drivers/virtualbox.md

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---
description: Oracle VirtualBox driver for machine
keywords: machine, Oracle VirtualBox, driver
title: Oracle VirtualBox
---
Create machines locally using [VirtualBox](https://www.virtualbox.org/).
This driver requires VirtualBox 5+ to be installed on your host.
Using VirtualBox 4.3+ should work but will give you a warning. Older versions
will refuse to work.
## Usage
$ docker-machine create --driver=virtualbox vbox-test
You can create an entirely new machine or you can convert a Boot2Docker VM into
a machine by importing the VM. To convert a Boot2Docker VM, you'd use the following
command:
$ docker-machine create -d virtualbox --virtualbox-import-boot2docker-vm boot2docker-vm b2d
The size of the VM's disk can be configured this way:
$ docker-machine create -d virtualbox --virtualbox-disk-size "100000" large
## Options
- `--virtualbox-memory`: Size of memory for the host in MB.
- `--virtualbox-cpu-count`: Number of CPUs to use to create the VM. Defaults to single CPU.
- `--virtualbox-disk-size`: Size of disk for the host in MB.
- `--virtualbox-host-dns-resolver`: Use the host DNS resolver. (Boolean value, defaults to false)
- `--virtualbox-boot2docker-url`: The URL of the boot2docker image. Defaults to the latest available version.
- `--virtualbox-import-boot2docker-vm`: The name of a Boot2Docker VM to import.
- `--virtualbox-hostonly-cidr`: The CIDR of the host only adapter.
- `--virtualbox-hostonly-nictype`: Host Only Network Adapter Type. Possible values are are '82540EM' (Intel PRO/1000), 'Am79C973' (PCnet-FAST III) and 'virtio' Paravirtualized network adapter.
- `--virtualbox-hostonly-nicpromisc`: Host Only Network Adapter Promiscuous Mode. Possible options are deny , allow-vms, allow-all
- `--virtualbox-no-share`: Disable the mount of your home directory
- `--virtualbox-no-dns-proxy`: Disable proxying all DNS requests to the host (Boolean value, default to false)
- `--virtualbox-no-vtx-check`: Disable checking for the availability of hardware virtualization before the vm is started
- `--virtualbox-share-folder`: Mount the specified directory instead of the default home location. Format: `dir:name`
The `--virtualbox-boot2docker-url` flag takes a few different forms. By
default, if no value is specified for this flag, Machine will check locally for
a boot2docker ISO. If one is found, that will be used as the ISO for the
created machine. If one is not found, the latest ISO release available on
[boot2docker/boot2docker](https://github.com/boot2docker/boot2docker) will be
downloaded and stored locally for future use. Note that this means you must run
`docker-machine upgrade` deliberately on a machine if you wish to update the "cached"
boot2docker ISO.
This is the default behavior (when `--virtualbox-boot2docker-url=""`), but the
option also supports specifying ISOs by the `http://` and `file://` protocols.
`file://` will look at the path specified locally to locate the ISO: for
instance, you could specify `--virtualbox-boot2docker-url
file://$HOME/Downloads/rc.iso` to test out a release candidate ISO that you have
downloaded already. You could also just get an ISO straight from the Internet
using the `http://` form.
To customize the host only adapter, you can use the `--virtualbox-hostonly-cidr`
flag. This will specify the host IP and Machine will calculate the VirtualBox
DHCP server address (a random IP on the subnet between `.1` and `.25`) so
it does not clash with the specified host IP.
Machine will also specify the DHCP lower bound to `.100` and the upper bound
to `.254`. For example, a specified CIDR of `192.168.24.1/24` would have a
DHCP server between `192.168.24.2-25`, a lower bound of `192.168.24.100` and
upper bound of `192.168.24.254`.
#### Environment variables and default values
| CLI option | Environment variable | Default |
| ------------------------------------ | ---------------------------------- | ------------------------ |
| `--virtualbox-memory` | `VIRTUALBOX_MEMORY_SIZE` | `1024` |
| `--virtualbox-cpu-count` | `VIRTUALBOX_CPU_COUNT` | `1` |
| `--virtualbox-disk-size` | `VIRTUALBOX_DISK_SIZE` | `20000` |
| `--virtualbox-host-dns-resolver` | `VIRTUALBOX_HOST_DNS_RESOLVER` | `false` |
| `--virtualbox-boot2docker-url` | `VIRTUALBOX_BOOT2DOCKER_URL` | _Latest boot2docker url_ |
| `--virtualbox-import-boot2docker-vm` | `VIRTUALBOX_BOOT2DOCKER_IMPORT_VM` | `boot2docker-vm` |
| `--virtualbox-hostonly-cidr` | `VIRTUALBOX_HOSTONLY_CIDR` | `192.168.99.1/24` |
| `--virtualbox-hostonly-nictype` | `VIRTUALBOX_HOSTONLY_NIC_TYPE` | `82540EM` |
| `--virtualbox-hostonly-nicpromisc` | `VIRTUALBOX_HOSTONLY_NIC_PROMISC` | `deny` |
| `--virtualbox-no-share` | `VIRTUALBOX_NO_SHARE` | `false` |
| `--virtualbox-no-dns-proxy` | `VIRTUALBOX_NO_DNS_PROXY` | `false` |
| `--virtualbox-no-vtx-check` | `VIRTUALBOX_NO_VTX_CHECK` | `false` |
| `--virtualbox-share-folder` | `VIRTUALBOX_SHARE_FOLDER` | `~:users` |
## Known Issues
Vboxfs suffers from a [longstanding bug](https://www.virtualbox.org/ticket/9069)
causing [sendfile(2)](http://linux.die.net/man/2/sendfile) to serve cached file
contents.
This will often cause problems when using a web server such as nginx to serve
static files from a shared volume. For development environments, a good
workaround is to disable sendfile in your server configuration.