fabric,

a tool with a similar purpose like chef, but instead of running on rails this is python that can run in a virtualenv.

its focus is mostly on remote scripting in python. this includes shell access and more over ssh.

Installation like on the Fabric Website, some template data from the Fabric Wiki, recipes and use_cases.

examples: fabrics own fabfile

example usage:
"could you let a script run that checks for free space, and maybe delete some logfiles on all production servers, please ?"

Log Bomb

A recommended read on this: Tools of the Modern Python Hacker: Virtualenv, Fabric and Pip, IPython and virtualenv and Fabricate Your Way to Better Deployment