utils.py

def container_run(name, cmd, nowait=False):
    """ run command in container

    :param str name: name of container
    :param str cmd: command to run
    """
    ip = container_ip(name)
    cmd = "sudo -H -u {3} TERM=xterm256-color ssh -t -q " \
          "-l ubuntu -o \"StrictHostKeyChecking=no\" " \
          "-o \"UserKnownHostsFile=/dev/null\" " \
          "-i {2} " \
          "{0} {1} >>/dev/null".format(ip, cmd, ssh_privkey(), install_user())
    if nowait:
        log.debug("Running command without waiting for response.")
        args = shlex.split(cmd)
        Popen(args, stdout=DEVNULL, stderr=DEVNULL)
    else:
        os.system(cmd)