install_server_utils_packages.py

fabfile.py

import cuisine
from fabric.api import roles, sudo

apt_updated = None

def apt_update(force=False):
    global apt_updated
    if force or not apt_updated:
        state = sudo('apt-get update -q')
        apt_updated = True
        return state
    return None

def packages_ensure(package_names):
    for package_name in package_names:
        cuisine.package_ensure(package_name)

@roles(['stage', 'test', 'web'])
def install_server_utils_packages():
    package_names = config['servers']['utils_packages']
    apt_update()
    packages_ensure(package_names)
    logger.notify('Done setup server utils')

# config example: config['servers']['utils_packages'] = [ htop, screen, tmux]
# run: fab install_server_utils -R web
#                                ^role

oh, and config of roles...
roledefs:
stage:
[]
test:
[1.1.1.1]
web:
[2.2.2.2]
db:
[]