def compose_redis_key(vim_name, vdu_uuid):
    """Compose the key for redis given vim name and vdu uuid

    Args:
        vim_name (str): The VIM name
        vdu_uuid (str): The VDU uuid (NFVI based)

    Returns:
        str: the key for redis
    """
    return "{}:{}".format(vim_name.lower(), vdu_uuid)