def METHOD_NAME(request):
    """
    Generate a '503 Service Unavailable' error page.
    """
    response = render(request, ERROR_TEMPLATE, {
        'maintenance_message': settings.SYSTEM_MAINTENANCE_MESSAGE,
    }, status=503)
    # Invoke log_response manually (causing the default logging to be
    # skipped), since otherwise Django will treat a 503 status as an
    # error requiring a verbose log message and email to admins
    log_response(
        'Service Unavailable: %s', request.path,
        request=request,
        response=response,
        level='warning',
    )
    return response