Hello @channel. Can someone please help with the automatic instrumentation for Express Nodejs app. I followed the guidelines here : Express OpenTelemetry Instrumentation | SigNoz I am still having this error:

const resource = new Resource({
                 ^

TypeError: Resource is not a constructor
    at Object.<anonymous>

I have also tried the pinned Github repo example and it still did not work. Can someone please help.

It looks like you're halfway down the page where the Typescript example shows:

resource: new Resource({
    [SemanticResourceAttributes.SERVICE_NAME]: '<service_name>',
  }),

have you tried the sample near the top of the page?

resource:  resourceFromAttributes({
    // highlight-next-line
    [SemanticResourceAttributes.SERVICE_NAME]: '<service_name>'
  })

because in TypeScript that's just an interface that can't be directly instantiated, so I think one of the examples is stale and wasn't updated when this OTel refactor happened. I didn't check the semvers of the packages, but the examples might be valid if they're version locked and you happened to install latest.

Can you please give me full code example. I am not using Typescript. Just ES6 JavaScript. And yes I required the tracing.js in my app's entry point , hence the errors. Can you provide the list of packages with their locked versions that works. Its been frustrating to net get going with instrumentation. Thanks

Sorry, I'm using the OTel operator so don't have my own tracing.js. I'd recommend this example from the page:

import * as opentelemetry from '@opentelemetry/sdk-node';
import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node';
import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-proto';
import { resourceFromAttributes } from '@opentelemetry/resources';
import { SemanticResourceAttributes } from '@opentelemetry/semantic-conventions';

const sdk = new opentelemetry.NodeSDK({
  traceExporter: new OTLPTraceExporter({
    // optional - default url is <http://localhost:4318/v1/traces>
    url: '<https://ingest>.<region>.signoz.cloud:443/v1/traces', // url is optional and can be omitted 
      headers: {
        "signoz-access-token": "<your-ingestion-key>"
      } // an optional object containing custom headers to be sent with each request
  }),
  instrumentations: [getNodeAutoInstrumentations()],
  resource:  resourceFromAttributes({
    // highlight-next-line
    [SemanticResourceAttributes.SERVICE_NAME]: '<service_name>'
  })
});
sdk.start();

Yes they were aparently some slight version mismatch due to these 2 packages:

import { resourceFromAttributes } from '@opentelemetry/resources';
import { SemanticResourceAttributes } from '@opentelemetry/semantic-conventions';

Those two are transitive dependencies of

sdk-node

so that's likely why they weren't explicitly listed. https://www.npmjs.com/package/@opentelemetry/sdk-node?activeTab=dependencies

Ok thanks will work with this