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page_title: Resizing a Boot2Docker Volume page_description: Resizing a Boot2Docker Volume in VirtualBox with GParted page_keywords: boot2docker, volume, virtualbox
Getting “no space left on device” Errors with Boot2Docker?
If you're using Boot2Docker with a large number of images, or the images you're working with are very large, you might run into trouble if the Boot2Docker VM's volume runs out of space. The solution is to increase the volume size by first cloning it, then resizing it using a disk partitioning tool. We'll use GParted since it's a free ISO and works well with VirtualBox.
1. Stop Boot2Docker’s VM
$ boot2docker stop
Boot2Docker ships with a VMDK image, which can’t be resized by VirtualBox’s native tools. We will instead create a VDI volume and clone the VMDK volume to it.
2. Clone the VMDK image to a VDI image
Using the command line VirtualBox tools, clone the VMDK image to a VDI image:
$ vboxmanage clonehd /full/path/to/boot2docker-hd.vmdk /full/path/to/<newVDIimage>.vdi -—format VDI -—variant Standard
3. Resize the new clone volume
Choose a size that will be appropriate for your needs. If you’re spinning up a lot of containers, or your containers are particularly large, larger will be better:
$ vboxmanage modifyhd /full/path/to/<newVDIimage>.vdi —-resize <size in MB>
4. Download a disk partitioning tool ISO
To resize the volume, you'll need a disk partitioning tool like GParted. Once you've downloaded the tool, add the ISO to the Boot2Docker VM’s IDE bus. You might need to create the bus before you can add the ISO.
5. Add the new VDI image
to the Boot2Docker image in VirtualBox.
6. Verify the boot order
In the System settings for the Boot2Docker VM, make sure that CD/DVD is the at the top of the Boot Order list.
7. Boot to the disk partitioning ISO
Manually start the Boot2Docker VM, and the disk partitioning ISO should start up. Using GParted, choose the GParted Live (default settings) option. Choose the default keyboard, language, and XWindows settings, and the GParted tool will start up and display the new VDI volume you created. Right click on the VDI and choose Resize/Move. Drag the slider representing the volume to its maximum size, click Resize/Move, and then Apply. Quit GParted and shut down the VM. Remove the GParted ISO from the IDE controller for the Boot2Docker VM in VirtualBox.
8. Start the Boot2Docker VM
Either directly in VirtualBox or using the command line (boot2docker start), start the Boot2Docker
VM to make sure the volume changes took effect.
You’re done!