How to manually send traces to Jaeger via OTLP HTTP in Node.js?

[krutoo]

Hi, in my Node.js app (simple http server) after switching from deprecated Jeager related Opentelemetry packages to OTLP protocol related packages my traces broken

Here is how i configure Opentelemetry in my app:

import os from "node:os";
import { BatchSpanProcessor } from "@opentelemetry/sdk-trace-base";
import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-http";
import { JaegerPropagator } from "@opentelemetry/propagator-jaeger";
import { NodeTracerProvider } from "@opentelemetry/sdk-trace-node";
import { Resource } from "@opentelemetry/resources";
import { SemanticResourceAttributes } from "@opentelemetry/semantic-conventions";
import { propagation, ROOT_CONTEXT, trace } from "@opentelemetry/api";

const resource = new Resource({
  [SemanticResourceAttributes.HOST_NAME]: os.hostname(),
  [SemanticResourceAttributes.SERVICE_NAME]: "some string",
  [SemanticResourceAttributes.SERVICE_VERSION]: "some string",
  [SemanticResourceAttributes.DEPLOYMENT_ENVIRONMENT]: "some string",
});

const provider = new NodeTracerProvider({ resource });

provider.addSpanProcessor(new BatchSpanProcessor(new OTLPTraceExporter()));

provider.register({ propagator: new JaegerPropagator() });

const tracer = provider.getTracer("some string", "some string");

And here is how i define spans:

function expressTracingMiddleware(req, res, next) {
  const externalContext = propagation.extract(ROOT_CONTEXT, req.headers);
  const rootSpan = tracer.startSpan("response", undefined, externalContext);

  rootSpan.setAttributes({ "request.path": req.originalUrl });

  const rootContext = trace.setSpan(externalContext, rootSpan);

  res.locals.tracing = {
    rootSpan,
    rootContext,
  };

  res.once("render:start", () => {
    res.locals.tracing.renderSpan = tracer.startSpan(
      "render",
      undefined,
      rootContext
    );
  });

  res.once("render:finish", () => {
    res.locals.tracing.renderSpan.end();
  });

  res.once("finish", () => {
    rootSpan.end();
  });

  next();
}

I run local docker container according to docs:
https://www.jaegertracing.io/docs/1.46/getting-started/#all-in-one

After i send several http requests to target http server there is no traces for my service in http://localhost:16686/search

There is only jeqger-query in Service field.

What am I doing wrong and how to properly confugure OTEL for sending traces to Jaeger via OTLP HTTP in Node.js? #3970

[krutoo]

looks like i forgot set env variable COLLECTOR_OTLP_ENABLED=true