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FAQ

I've just installed a new Boot2Docker and I get client and server don't have the same version

There's a good chance that your Boot2Docker virtual machine existed before you upgraded your Docker client.

How can I solve my problems with SSH?

If ssh complains about the keys:

$ ssh-keygen -R '[localhost]:2022'

Login as root

Run sudo -s as the docker user.

What is the Boot2Docker distribution based on?

It is based on a stripped down Tiny Core Linux.

Persistent partition choice

Boot2Docker will first try to mount a partition labeled boot2docker-data, if that doesn't exist, it will pick the first ext4 partition listed by blkid.

Local Customisation (with persistent partition)

Changes outside of the /var/lib/docker and /var/lib/boot2docker directories will be lost after powering down or restarting the boot2docker VM. However, if you have a persistence partition (created automatically by boot2docker init), you can make customisations that are run at the end of boot initialisation by creating a script at /var/lib/boot2docker/bootlocal.sh.

From Boot2Docker version 1.6.0, you can also specify steps that are run before the Docker daemon is started, using /var/lib/boot2docker/bootsync.sh.

You can also set variables that will be used during the boot initialisation (after the automount) by setting them in /var/lib/boot2docker/profile

For example, to download pipework, install its pre-requisites (which you can download using tce-load -w package.tcz), and then start a container:

#!/bin/shif [ !-e /var/lib/boot2docker/pipework ];then
curl -o /var/lib/boot2docker/pipework https://raw.github.com/jpetazzo/pipework/master/pipework
chmod 777 /var/lib/boot2docker/pipework
fi#need ftp://ftp.nl.netbsd.org/vol/2/metalab/distributions/tinycorelinux/4.x/x86/tcz/bridge-utils.tcz#and iproute2 (and its friends)
su - docker -c "tce-load -i /var/lib/boot2docker/*.tcz"#start my management container if its not already there
docker run -d -v /var/run/docker.sock:/var/run/docker.sock $(which docker):$(which docker) -name dom0 svens-dom0

Or, if you need to tell the Docker daemon to use a specific DNS server, add the following to /var/lib/boot2docker/profile:

EXTRA_ARGS="$EXTRA_ARGS --dns 192.168.1.2"