Jaeger (Tracing)

• Introduction
• Installing the exporter
• Creating the exporter
• Viewing your traces
• Project link

Introduction

Jaeger, inspired by Dapper and OpenZipkin, is a distributed tracing system released as open source by Uber Technologies. It is used for monitoring and troubleshooting microservices-based distributed systems, including:

• Distributed context propagation
• Distributed transaction monitoring
• Root cause analysis
• Service dependency analysis
• Performance / latency optimization

OpenCensus Node.js has support for this exporter available, distributed through NPM package @opencensus/exporter-jaeger

Installing the exporter

You can install OpenCensus Jaeger Exporter by running these steps:

npm install @opencensus/core
npm install @opencensus/nodejs
npm install @opencensus/exporter-jaeger

Creating the exporter

Now let’s use the Jaeger exporter:

const { logger } = require('@opencensus/core');
const { JaegerTraceExporter } = require('@opencensus/exporter-jaeger');
const tracing = require('@opencensus/nodejs');

// Add service name and jaeger options
const jaegerOptions = {
  serviceName: 'opencensus-exporter-jaeger',
  host: 'localhost',
  port: 6832,
  tags: [{key: 'opencensus-exporter-jeager', value: '0.0.9'}],
  bufferTimeout: 10, // time in milliseconds
  logger: logger.logger('debug')
};

const exporter = new JaegerTraceExporter(jaegerOptions);
tracing.registerExporter(exporter).start();

Viewing your traces

Please visit the Jaeger UI endpoint http://localhost:16686

Project link

You can find out more about the Jaeger project at https://www.jaegertracing.io/