code: def init(self):
          
          try:
              start_http_server(port=int(self.port), addr=self.host)
          except Exception as e:
              logger.critical("Can not start Prometheus exporter on {}:{} ({})".format(self.host, self.port, e))
              sys.exit(2)
          else:
              logger.info("Start Prometheus exporter on {}:{}".format(self.host, self.port))
docs: Init the Prometheus Exporter