def healthy(self):
        """Return 200 is healthy, else 500.

        Override is_healthy() to change the health check.
        """
        try:
            if self.is_healthy():
                return "OK", 200

            else:
                return "FAIL", 500

        except Exception as e:
            self.app.logger.exception(e)
            return str(e), 500
Return 200 is healthy, else 500.

        Override is_healthy() to change the health check.