asp .net core mvc to get response duration in opensearch using opentelemetry

[NamanGajjar26]

hello
i am using asp .net core mvc (.net 8.0)
there are configure like this below

      builder.Services.AddOpenTelemetry()
          .WithTracing(tracerProviderBuilder =>
          {
              tracerProviderBuilder
                  .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("otelhttprequst"))
                  .AddAspNetCoreInstrumentation()
                  .AddHttpClientInstrumentation()
                  .AddOtlpExporter(otlpOptions =>
                  {
                      // Configure OTLP exporter (for sending traces to your preferred backend)
                      otlpOptions.Endpoint = new Uri("http://open-collector-opentelemetry-collector.default.svc.cluster.local:4317");
                  });
          })
          .WithMetrics(metricProviderBuilder =>
          {
              metricProviderBuilder
                  .AddAspNetCoreInstrumentation()
                  .AddHttpClientInstrumentation()
                  .AddOtlpExporter(otlpOptions =>
                  {
                      // Configure OTLP exporter for metrics
                      otlpOptions.Endpoint = new Uri("http://open-collector-opentelemetry-collector.default.svc.cluster.local:4318");
                  });
          });

there get output in opensearch like below there not show response time duration

        {
          "_index": "ss4o_traces-default-namespace",
          "_id": "B2nORpIBQbQRbxsCRA7w",
          "_version": 1,
          "_score": null,
          "_source": {
            "attributes": {
              "data_stream": {
                "dataset": "default",
                "namespace": "namespace",
                "type": "span"
              },
              "http.request.method": "GET",
              "http.response.status_code": 200,
              "network.protocol.version": "1.1",
              "server.address": "127.0.0.1",
              "server.port": 5202,
              "url.path": "/otelhttprequst.styles.css",
              "url.query": "?v=Redacted",
              "url.scheme": "http",
              "user_agent.original": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0"
            },
            "droppedAttributesCount": 0,
            "droppedEventsCount": 0,
            "droppedLinksCount": 0,
            "endTime": "2024-10-01T06:39:32.8653876Z",
            "instrumentationScope": {
              "droppedAttributesCount": 0,
              "name": "Microsoft.AspNetCore",
              "schemaUrl": "",
              "version": ""
            },
            "kind": "Server",
            "name": "GET",
            "parentSpanId": "",
            "resource": {
              "app.kubernetes.io/instance": "otelhttprequest",
              "app.kubernetes.io/managed-by": "Helm",
              "app.kubernetes.io/name": "otelreq",
              "app.kubernetes.io/version": "1.16.0",
              "helm.sh/chart": "otelreq-0.1.0",
              "k8s.deployment.name": "otelhttprequest-otelreq",
              "k8s.namespace.name": "default",
              "k8s.node.name": "minikube",
              "k8s.pod.ip": "10.244.2.174",
              "k8s.pod.name": "otelhttprequest-otelreq-67c4c76cc9-mrb8t",
              "k8s.pod.start_time": "2024-09-30T10:19:40Z",
              "k8s.pod.uid": "931cb546-31e3-452d-b930-36c6024cc16d",
              "pod-template-hash": "67c4c76cc9",
              "service.instance.id": "66bfc243-e6b5-4e25-bfe8-e6577d359ba8",
              "service.name": "otelhttprequst",
              "telemetry.sdk.language": "dotnet",
              "telemetry.sdk.name": "opentelemetry",
              "telemetry.sdk.version": "1.9.0"
            },
            "spanId": "7161d8db46e24882",
            "startTime": "2024-10-01T06:39:32.8472183Z",
            "status": {
              "code": "Unset",
              "message": ""
            },
            "@timestamp": "0001-01-01T00:00:00Z",
            "traceId": "c7f4936155f642a7a27da157bea6769b",
            "traceState": ""
          },
          "fields": {
            "resource.k8s.pod.start_time": [
              "2024-09-30T10:19:40.000Z"
            ],
            "startTime": [
              "2024-10-01T06:39:32.847Z"
            ],
            "@timestamp": [
              "0001-01-01T00:00:00.000Z"
            ],
            "endTime": [
              "2024-10-01T06:39:32.865Z"
            ]
          },
          "sort": [
            1727764772847
          ]
        }