OpenTelemetry instrumentation of nginx

This repository contains an example setup based on docker compose containing two services connected via a nginx reverse proxy that is instrumented with the otel-webserver-module.

To start the setup run:

docker compose up --build

This will start

• service-a: a simple NodeJS application providing a /serviceA endpoint which when called is initiating a request against /serviceB via the reverse proxy and returning the combined result
• service-b: a simple NodeJS application providing a /serviceB endpoint
• nginx: a reverse proxy connecting both services
• opentelemetry-collector: an OpenTelemetry collector that is forwarding the collected traces to the tracing backend
• jaeger: a tracing backend to store and visualize the recorded traces

Initiate requests against http://localhost/ServiceA and have a look at the resulting traces in jeager http://localhost:16686.