opentelemetry-js/examples/redis

Overview

OpenTelemetry Redis 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 calls to a Redis cache via an Express API. 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

• Start redis via docker

  # from this directory
  npm run docker:start
  

• Run the server

  # from this directory
  $ npm run zipkin:server
  

• Run the client

  # from this directory
  npm run zipkin:client
  

• Cleanup docker

  # from this directory
  npm run docker:stop
  

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

• Start redis via docker

  # from this directory
  npm run docker:start
  

• Run the server

  # from this directory
  $ npm run jaeger:server
  

• Run the client

  # from this directory
  npm run jaeger:client
  

• Cleanup docker

  # from this directory
  npm run docker:stop
  

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/master/packages/opentelemetry-node

LICENSE

Apache License 2.0