docker-machine/ boot2docker with NFS instead of vboxsf

boot2docker-nfs.rb

#!/usr/bin/env ruby

# Usage
# $ docker-machine create my-machine123 -d virtualbox
# $ ruby <(curl -L https://git.io/v6r1A) my-machine123
# https://gist.github.com/cariandrum22/278973172442d6f54a0c3ab83a86469f

# fork from https://gist.github.com/mattes/4d7f435d759ca2581347
# I owe you a lot, mattes.

require 'erb'
require 'optparse'

BOOTLOCAL_SH_TEMPLATE = <<EOL
#/bin/bash
sudo umount /Users
sudo /usr/local/etc/init.d/nfs-client start
sudo mount -t nfs -o noacl,async <%= ip %>:/Users /Users
EOL
.freeze

class DockerMachineNfs
  def initialize(machine_name, driver)
    @bootlocal = BOOTLOCAL_SH_TEMPLATE
    case driver
    when 'virtualbox' then
      @uid = `id -u`.chomp
      @gid = `id -g`.chomp
      @dmachine_name = machine_name
      @dmachine_ip = `docker-machine ip #{machine_name}`.chomp
      @vboxnet_ip = VirtualBox.get_vboxnet_ip(VirtualBox.get_hostonly_adapter(machine_name))
    else
      raise 'This script dose not support selected driver: ' + driver
    end
    yield self if block_given?
  end

  def setup_nfs_server
    # create record in local /etc/exports and restart nsfd
    puts 'Update /etc/exports ...'
    `echo '\n/Users #{@dmachine_ip} -alldirs -mapall=#{@uid}:#{@gid}\n' | sudo tee -a /etc/exports`
    `awk '!a[$0]++' /etc/exports | sudo tee /etc/exports` # removes duplicate lines
    `sudo nfsd restart`
    sleep 2
    checkexports = `sudo nfsd checkexports 2>&1`
    if checkexports == ''
      puts ' > Done.'
    else
      raise 'exec `sudo nfsd checkexports`: ' + checkexports
    end
  end

  def setup_nfs_client
    # render bootlocal.sh and copy bootlocal.sh over to boot2docker
    # (this will override an existing /var/lib/boot2docker/bootlocal.sh)
    puts 'Update boot2docker virtual machine ...'
    ip = @vboxnet_ip
    first = true
    ERB.new(@bootlocal).result(binding).split("\n").each do |l|
      `docker-machine ssh #{@dmachine_name} 'echo \"#{l}\" | sudo tee #{first ? '' : '-a'} /var/lib/boot2docker/bootlocal.sh'`
      first = false
    end
    `docker-machine ssh #{@dmachine_name} 'sudo chmod +x /var/lib/boot2docker/bootlocal.sh'`
    `docker-machine ssh #{@dmachine_name} 'sudo sync'`

    puts "Restart #{@dmachine_name} ..."
    `docker-machine restart #{@dmachine_name}`
    puts ' > Done.'
  end

  def check
    puts "Check if NFS is mounted on docker-machine \"#{@dmachine_name}\"."
    sleep 2
    result = <<-EOS
 > failed: Try `docker-machine ssh #{@dmachine_name} df`.
           Output should include something like this: '#{@vboxnet_ip}:/Users [...] /Users'
    EOS
    `docker-machine ssh #{@dmachine_name} df`.each_line do |l|
      result = ' > Done.' if %r{^#{@vboxnet_ip}:/Users.*/Users$} =~ l.chomp
    end
    puts result
  end
end

module VirtualBox
  class << self

    def get_hostonly_adapter(machine_name)
      puts 'Get vbox hostonly adapter name ...'
      vboxnet_name = `VBoxManage showvminfo #{machine_name} --machinereadable | grep hostonlyadapter`
                         .scan(/"(.*)"/).flatten.first.chomp
      raise 'error: unable to find name of vboxnet' if vboxnet_name == ''
      puts ' > ' + vboxnet_name
      vboxnet_name
    end

    def get_vboxnet_ip(vboxnet_name)
      puts 'Get vbox net ip address ...'
      `VBoxManage list hostonlyifs`.split("\n\n").each do |vboxnet|
        if vboxnet.scan(/Name: *(.+?)\n/).flatten.first.chomp == vboxnet_name
          vboxip = vboxnet.scan(/IPAddress: *(.*)\n/).flatten.first.chomp
          puts ' > ' + vboxip
          return vboxip
        else
          next
        end
      end
    end
  end
end

def main
  options = { driver: 'virtualbox' }
  OptionParser.new do |op|
    op.on('-d', '--driver "virtualbox"', 'docker-machine driver (default:virtualbox)') { |v| options[:driver] = v }
    op.parse!(ARGV)
  end

  if ARGV.length != 1
    puts "Usage: #{File.basename(__FILE__)} machine_name"
    exit 1
  end

  machine_name = ARGV[0]
  driver = options[:driver]

  DockerMachineNfs.new(machine_name, driver) do |d|
    d.setup_nfs_server
    d.setup_nfs_client
    d.check
  end
end

main