with builtins; {

  resource = {

    graylog_input = {

      nginx_access_logs = {
        title = "nginx access log";
        # https://javadoc.io/doc/org.graylog2/graylog2-inputs/latest/index.html
        type = "org.graylog2.inputs.syslog.udp.SyslogUDPInput";
        global = true;
        attributes = toJSON ({
          allow_override_date = true;
          bind_address = "0.0.0.0";
          expand_structured_data = false;
          force_rdns = false;
          number_worker_threads = 4;
          port = 12304;
          recv_buffer_size = 1048576;
          store_full_message = false;
        });
      };

      nginx_error_logs = {
        title = "nginx error log";
        # https://javadoc.io/doc/org.graylog2/graylog2-inputs/latest/index.html
        type = "org.graylog2.inputs.syslog.udp.SyslogUDPInput";
        global = true;
        attributes = toJSON ({
          allow_override_date = true;
          bind_address = "0.0.0.0";
          expand_structured_data = false;
          force_rdns = false;
          number_worker_threads = 4;
          port = 12305;
          recv_buffer_size = 1048576;
          store_full_message = false;
        });
      };

    };

    graylog_input_static_fields = {

      nginx_access_logs = {
        input_id = "\${graylog_input.nginx_access_logs.id}";
        fields = {
          from_nginx = true;
          nginx_error = false;
          nginx_access = true;
        };
      };

      nginx_error_logs = {
        input_id = "\${graylog_input.nginx_error_logs.id}";
        fields = {
          from_nginx = true;
          nginx_error = true;
          nginx_access = false;
        };
      };

    };

  };
}