Clone the gist anyway you like in you MediaTemple GridServer and execute it with bash mt_gs_rdiff-backup_installer.sh No params, no questions, just straight. It will install rdiff-backup on your GS instance, enabling you to do remote backups using rdiff-backup. If you have questions or a beer for us twit us @welaika and @Pioneer_Skies

(BK).sh

#!/bin/bash
# Clone the gist anyway you like in you MediaTemple GridServer and execute it with
# bash mt_gs_rdiff-backup_installer.sh
# No params, no questions, just straight. Logout and log back after script's ended
# Credits to @weliaka: https://github.com/welaika http://welaika.com http://pisadmin.welaika.com
# Also follow ups on this article are welcome:
# http://pisadmin.welaika.com/post/44637112969/our-definitive-mt-grid-service-backup-solution

cd ~/data/tmp
wget http://savannah.nongnu.org/download/rdiff-backup/rdiff-backup-1.2.8.tar.gz
wget http://downloads.sourceforge.net/librsync/librsync-0.9.7.tar.gz

tar xvzf rdiff-backup-1.2.8.tar.gz
tar xvzf librsync-0.9.7.tar.gz
rm *.gz

export CFLAGS="$CFLAGS -fPIC" 
export CXXFLAGS="$CFLAGS" 

MT_NUMBER=`dirname ~ | sed -e "s/\/home\/\([0-9]\+\)\/.*/\1/;" | tr -d \'\n\'`
PREFIX=/home/$MT_NUMBER/data/local
export PATH=$PREFIX/bin:$PATH
export LIBRSYNC_DIR=$PREFIX
export PYTHONPATH=$PREFIX/lib/python2.6/site-packages:$PYTHONPATH

cd librsync-0.9.7
./configure --prefix=$PREFIX
make
make install

cd ../rdiff-backup-1.2.8
python setup.py --librsync-dir=$PREFIX build
python setup.py install --prefix=$PREFIX

cd ~
[[ `grep PYTHONPATH .bashrc` ]] || (
  sed -i '3 i\
\
## MyLOCAL bin PATH\
MT_NUMBER=`dirname ~ | sed -e "s/\\/home\\/\\([0-9]\\+\\)\\/.*/\\1/;" | tr -d \"\\n\"`\
export PATH="$PATH:/home/${MT_NUMBER}/data/local/bin"\
export PYTHONPATH="/home/${MT_NUMBER}/data/local/lib/python2.6/site-packages"\
' .bashrc
)

source .bashrc

if [[ `which rdiff-backup` ]]; then
  echo 'Seems to work, dear sir'
  exit 0
else
  echo 'Sgrunt! Something is wrong here!'
  exit 1
fi

Just some revisions after production testing. Now all works for me. Leave a twit @Pioneer_Skies if you have trouble

A little announce and a place to discuss: http://pisadmin.welaika.com/post/44637112969/our-definitive-mt-grid-service-backup-solution