example python fabric task

fabfile.py

#! /bin/env/python

from fabric.api import *

env.use_ssh_config=True

env.roledefs = {
'all': [
  'host1',
  'host2',
  'host3',
  'host4',
  'host5'],
  }

#@parallel(pool_size=3)
@task
def aptget_upgrade():
  sudo('apt-get -y update')
  sudo('apt-get -y upgrade')