Various fixes for Vagrant (Lucid64) on Mac OS X Lion

Vagrantfile

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

# Preventing kernel panics - VirtualBox 4.1 and Mac OS X Lion 10.7.
#
# This happens on my Macbook Air Mid-2011 Core i7. Every few hours, with
# one or (particularly) more VMs running, you will get a kernel panic.
#
# Some reading:
#   https://www.virtualbox.org/ticket/9359
#   https://forums.virtualbox.org/viewtopic.php?f=8&t=45387
#   https://groups.google.com/forum/#!topic/vagrant-up/o3qv-ZMwrFQ
#
# The fix - downgrade to VirtualBox 4.0.14:
#
#   OSX: http://download.virtualbox.org/virtualbox/4.0.14/VirtualBox-4.0.14-74382-OSX.dmg
#
#   You should modify your base box to run the same version of
#   VirtualBox Guest Additions. Create a new vagrant project,
#   vagrant up, and ssh in. Run the following:
#
#   $ sudo apt-get install linux-headers-`uname -r`
#   $ cd /opt
#   $ wget http://download.virtualbox.org/virtualbox/4.0.14/VBoxGuestAdditions_4.0.14.iso
#   $ sudo mount VBoxGuestAdditions_4.0.14.iso -o loop /mnt
#   $ cd /mnt
#   $ sudo sh VBoxLinuxAdditions.run --nox11
#   $ sudo rm /opt/VBoxGuestAdditions_4.0.14.iso
#
#   Now logout and package up the box so you can reimport
#   it as your base box. (See Vagrant documentation for details on this.)
#

Vagrant::Config.run do |config|
  # This prevents disk corruption (deleted inodes) on Ext4
  # filesystems under VirtualBox. In newer versions of VirtualBox,
  # it may be on by default. If you are seeing 'read-only file system'
  # errors, or 'input/output errors', or constant fsck errors on reboot,
  # you need this.
  #
  # Some reading:
  #
  # http://joeshaw.org/2011/09/30/terrible-vagrant-virtualbox-performance-on-mac-os-x/
  # https://www.virtualbox.org/ticket/9749
  # https://bugs.launchpad.net/ubuntu/+source/linux/+bug/528981 (Comment #51)
  #
  config.vm.customize([
    'storagectl',
    :id,
    '--name',
    'SATA Controller',
    '--hostiocache',
    'on'
  ])

  # As of VirtualBox 4.1, you have to explicitly indicate that you will
  # allow symlinks to be created in your shared folders. This is for
  # security reasons. (I'm not using 4.1 yet, but I expect to.)
  #
  # Note that this config is PER-FOLDER, so if you create other shared
  # folders, replace 'v-root' in this statement with the shared folder id.
  #
  config.vm.customize([
    'setextradata',
    :id,
    'VBoxInternal2/SharedFoldersEnableSymlinksCreate/v-root',
    '1'
  ])

  # This is how you set memory (MB).
  #
  config.vm.customize([
    'modifyvm',
    :id,
    '--memory',
    512
  ])

end