def __init__(self, logging_level=logging.INFO, logging_kwargs=None, cleanup=None):
super(DockerBackend, self).__init__(<EOL>logging_level=logging_level, logging_kwargs=logging_kwargs, cleanup=cleanup)<EOL>self.d = get_client()<EOL>
This method serves as a configuration interface for conu.

:param logging_level: int, control logger verbosity: see logging.{DEBUG,INFO,ERROR}
:param logging_kwargs: dict, additional keyword arguments for logger set up, for more info
                        see docstring of set_logging function
:param cleanup: list, list of cleanup policy values, examples:
    - [CleanupPolicy.EVERYTHING]
    - [CleanupPolicy.VOLUMES, CleanupPolicy.TMP_DIRS]
    - [CleanupPolicy.NOTHING]