opentelemetry-js/examples/http

Overview

OpenTelemetry HTTP Instrumentation allows the user to automatically collect trace data and export them to the backend of choice (we can use Zipkin or Jaeger for this example), to give observability to distributed systems.

This is a simple example that demonstrates tracing HTTP request from client to server. The example shows key aspects of tracing such as

• Root Span (on Client)
• Child Span (on Client)
• Child Span from a Remote Parent (on Server)
• SpanContext Propagation (from Client to Server)
• Span Events
• Span Attributes

Installation

# from this directory
npm install

Setup Zipkin Tracing or Setup Jaeger Tracing

Run the Application

Zipkin

• Run the server

  # from this directory
  npm run zipkin:server
  

• Run the client

  # from this directory
  npm run zipkin:client
  

Zipkin UI

zipkin:server script should output the traceid in the terminal (e.g traceid: 4815c3d576d930189725f1f1d1bdfcc6). Go to Zipkin with your browser http://localhost:9411/zipkin/traces/(your-trace-id) (e.g http://localhost:9411/zipkin/traces/4815c3d576d930189725f1f1d1bdfcc6)

Jaeger

• Run the server

  # from this directory
  npm run jaeger:server
  

• Run the client

  # from this directory
  npm run jaeger:client
  

Jaeger UI

jaeger:server script should output the traceid in the terminal (e.g traceid: 4815c3d576d930189725f1f1d1bdfcc6). Go to Jaeger with your browser http://localhost:16686/trace/(your-trace-id) (e.g http://localhost:16686/trace/4815c3d576d930189725f1f1d1bdfcc6)

Useful links

• For more information on OpenTelemetry, visit: https://opentelemetry.io/
• For more information on OpenTelemetry for Node.js, visit: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-sdk-trace-node

LICENSE

Apache License 2.0