CODEWITHSUNDEEP
tracenestjsistiojaeger
Jerric Lyns John
Jerric Lyns John

Reputation: 936

How to include tracing for requests propagated using NestJS?

I'm setting up Jager tracing in Istio, but I cannot figure out how i should propagate the headers required in NestJS.

I've searched around in documentation for injection per request, but cant really wrap my head around it.

The headers that needs to be propagated are the following:

x-request-id
x-b3-traceid
x-b3-spanid
x-b3-parentspanid
x-b3-sampled
x-b3-flags
x-ot-span-context

Upvotes: 1

Views: 4227

Answers (1)

Andrew Ridout
Andrew Ridout

Reputation: 444

I used the hpropagate npm package to get this working on my Istio cluster. It takes care of all the heavy lifting of extracting the trace headers from the incoming request and appending them to any outbound requests.

Install

npm install hpropagate

Usage

In main.ts, import the package and call the function (with whatever default overrides you need) before creating the Nest app.

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import hpropagate from 'hpropagate';

async function bootstrap() {

  hpropagate({
    setAndPropagateCorrelationId: false,
  });

  const app = await NestFactory.create(AppModule);
  await app.listen(3000);
}
bootstrap();

For more info, check out this article: https://medium.com/ww-engineering/headers-propagation-with-hpropagate-27de8347f76a

Upvotes: 3

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