Install Virtualbox Guest Additions

virtualbox_guest_additions.sh

#! /bin/bash
#########################################################################
# Install VirtualBox Guest Additions
# Install yum dependencies gcc, curl, kernel-devel, kernel headers
# Install DKMS from source
# Install Guest Additions (they should be copied up by packer, if not
#   then download from virtualbox.org)
# When DKMS is installed first, the guest additions should be rebuilt
#   when the kernel is upgraded.
#########################################################################

echo install virtualbox guest additions
echo vboxguestadditions: check if guest additions are installed

if modprobe -q vboxguest
then
  echo vboxguestadditions: guest additions already installed
  exit 0
fi

# dependencies for guest additions
echo vboxguestadditions: install gcc, curl, and kernel-devel
yum install -y gcc kernel-devel curl kernel-devel-$(uname -r)

# dkms is needed so that guest additions are rebuilt when the kernel is upgraded
echo vboxguestadditions: download and install dkms
yum install -y http://linux.dell.com/dkms/permalink/dkms-2.2.0.3-1.noarch.rpm

ISONAME=/root/VBoxGuestAdditions.iso
echo vboxguestadditions: check if $ISONAME exists
if ! [ -f $ISONAME ]; then
  echo vboxguestadditions: $ISONAME does not exist, downloading
  latest=`curl -L http://download.virtualbox.org/virtualbox/LATEST.TXT`
  curl -L http://download.virtualbox.org/virtualbox/$latest/VBoxGuestAdditions_$latest.iso -o $ISONAME
fi

GUESTMOUNT=/mnt/guestadditions
mkdir $GUESTMOUNT
mount -t iso9660 $ISONAME $GUESTMOUNT -o loop
echo vboxguestadditions: installing guest additions
$GUESTMOUNT/VBoxLinuxAdditions.run 
umount $GUESTMOUNT
rmdir $GUESTMOUNT
rm $ISONAME
echo vboxguestadditions: finished