OS X Docker dev env with Vagrant that doesn't suck entirely

README.md

This'll suffice until boot2docker get their shit together and give me VirtualBox shared folder support.

On OS X, just export DOCKER_HOST=tcp://172.28.128.3:4243 and off you go. All exposed ports can be accessed via 172.28.128.3 (assuming that's the IP you get from VirtualBox).

Your entire home directory is mounted under the same path, so from OS X you can do docker run -i -t -v $HOME/devel/some-project:/srv/some-project image /bin/bash and the volume will be mounted as you'd expect. With a caveat: filesystem notifications (inotify and friends) don't get passed along.

provision.sh

#!/bin/bash

if [ ! -e /var/run/docker_provisioned ]; then
    mkfs.ext4 -F -m 0 -L var-lib-docker /dev/sdb
    mkdir /var/lib/docker
    
    echo "LABEL=var-lib-docker /var/lib/docker ext4 defaults 0 0" >> /etc/fstab
    mount /var/lib/docker

    yum install -y docker-io

    usermod -a -G docker vagrant

    sed -i -e '/other_args/ s#^.*$#other_args="-H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock"#g' /etc/sysconfig/docker

    chkconfig docker on
    service docker start
    
    date > /var/run/docker_provisioned
fi

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure("2") do |config|
    config.vm.box = "…"
    config.vm.box_url = "…/#{config.vm.box}.box"
    
    config.vm.network(:private_network, type: :dhcp)
    config.vm.synced_folder(ENV["HOME"], ENV["HOME"])

    config.ssh.forward_agent = true
    
    config.vm.provider :virtualbox do |vb| 
        file_to_disk = File.dirname(__FILE__) + "/tmp/large_disk.vdi"

        unless File.exist?(file_to_disk)
            vb.customize ["createhd", "--filename", file_to_disk, "--size", 20 * 1024]
        end
        
        # if ARGV[0] == "up"
        #     vb.customize ["storageattach", :id, "--storagectl", "IDE Controller", "--port", 1, "--device", 0, "--type", "hdd", "--medium", file_to_disk]
        # end
        
        vb.memory = 1024
    end

    config.vm.provision "shell", path: "provision.sh"
end