def get_redshift_cluster_host(redshift, cluster_identifier):
    """
    Retrieves Redshift cluster hostname

    Args:
        redshift: Redshift client.
        cluster_identifier: Redshift cluster identifier.

    Returns:
        Redshift cluster hostname

    """
    return redshift.describe_clusters(ClusterIdentifier=cluster_identifier)['Clusters'][0]['Endpoint']['Address']