def ami_lookup(region='us-east-1', name='tomcat8'):
    """Look up AMI ID.

    Use _name_ to find AMI ID. If no ami_base_url or gitlab_token is provided,
    _name_ is returned as the ami id.

    Args:
        region (str): AWS Region to find AMI ID.
        name (str): Simple AMI base name to lookup.

    Returns:
        str: AMI ID for _name_ in _region_.

    """
    if AMI_JSON_URL:
        ami_dict = _get_ami_dict(AMI_JSON_URL)
        ami_id = ami_dict[region][name]
    elif GITLAB_TOKEN:
        warn_user('Use AMI_JSON_URL feature instead.')
        ami_contents = _get_ami_file(region=region)
        ami_dict = json.loads(ami_contents)
        ami_id = ami_dict[name]
    else:
        ami_id = name

    LOG.info('Using AMI: %s', ami_id)

    return ami_id
Look up AMI ID.

    Use _name_ to find AMI ID. If no ami_base_url or gitlab_token is provided,
    _name_ is returned as the ami id.

    Args:
        region (str): AWS Region to find AMI ID.
        name (str): Simple AMI base name to lookup.

    Returns:
        str: AMI ID for _name_ in _region_.