Downloads ISO w/ Guest Additions for Virtual Box v4.3.14 and sets up boot2docker to use it

install_vbox_guest_additions_docker.sh

#!/bin/bash

if [ -z $(which boot2docker) ]; then
  echo "You must install boot2docker first"
  echo "Your PATH: $PATH"
  exit 1
fi

if [ -z $(which VBoxManage) ]; then
  echo "You must have VBoxManager in your PATH"
  echo "Your PATH: $PATH"
  exit 1
fi

echo "Stopping current VM..."
boot2docker stop 2> /dev/null

ISO_URL="http://static.dockerfiles.io/boot2docker-v1.2.0-virtualbox-guest-additions-v4.3.14.iso"
ISO_PATH=~/.boot2docker/boot2docker.iso
MD5_ISO=9031696c467eb8a141e208eec8c03632
MD5_LOCAL_ISO=$(md5 -q $ISO_PATH)

if [ "$MD5_ISO" != "MD5_LOCAL_ISO" ]; then
  echo "Downloading ISO..."
  curl -s -o $ISO_PATH $ISO_URL
else
  echo "Skipping ISO download!"
fi

echo "Initializing boot2docker..."
SUCCESS=$(boot2docker init)
if [ "$SUCCESS" != "0" ]; then
  echo "Error initializing, destroying VM..."
  boot2docker destroy 2> /dev/null
  echo "Trying again..."
  boot2docker init
fi

SHARED_FOLDERS=$(VBoxManage showvminfo --machinereadable boot2docker-vm | grep SharedFolderNameMachineMapping)
SHARED_HOME_FOLDER=$(echo $SHARED_FOLDERS | grep home)

if [ -z "$SHARED_HOME_FOLDER" ]; then
  echo "Linking home folder into VM..."
  VBoxManage sharedfolder add boot2docker-vm -name home -hostpath /Users
else
  echo "Skipping home folder linkage..."
  echo "Linked folders: $SHARED_FOLDERS"
fi


echo "Configuring VM to use 8 GB..."
VBoxManage modifyvm "boot2docker-vm" --memory 8192

echo "Starting VM..."
boot2docker up

Also maps home directory to the vm, allowing docker run -v ./mydir/:/containerdir/ imagename

Pre-requisites: boot2docker installed and running, Virtual Box v4.3.14