Fabric file to run a command in a openvz guest without outside connectivity

fabfile.py

from fabric_openvz import guests, vz_run

@guests('uhura', 'obiwan')
def uname_a(guest):
    """
    Show uname -a on given guests
    """
    vz_run(guest, 'uname -a')

@guests('uhura', 'obiwan')
def ps_aux(guest):
    """
    Show output of ps aux of given guests
    """
    vz_run(guest, 'ps aux')

@guests('uhura')
def hostname(guest):
    """
    Show output of hostname of given guests
    """
    vz_run(guest, 'hostname')

fabric_openvz.py

from functools import wraps
from fabric.api import sudo, env

#env.hosts = ['user@vzhost']
vz_commands = {}

def guests(*guest_list):
    """
    A decorator executing a list of commands in the given guest container
    """
    def run_in_guests(func):
        @wraps(func)
        def inner_decorator(*args, **kwargs):
            # in case someone passes the guest directly to the task
            if 'guest' in kwargs:
                runner(kwargs.pop('guest'), *args, **kwargs)
            else:
                for guest in guest_list:
                    runner(guest, *args, **kwargs)
        def runner(guest, *args, **kwargs):
            func(guest=guest, *args, **kwargs)
            commands = '; '.join(vz_commands.pop(guest))
            sudo('vzctl exec %s %s' % (guest, commands))
        return inner_decorator
    return run_in_guests

def vz_run(guest, cmd):
    """
    Runs a command in the given openvz guest
    """
    vz_commands.setdefault(guest, []).append(cmd)