Jaeger (Tracing)

• Introduction
• 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 Go has support for this exporter available through package contrib.go.opencensus.io/exporter/jaeger

Creating the exporter

To create the exporter, we’ll need to:

• Create an exporter in code
• Have the Jaeger endpoint available to receive traces

package main

import (
	"log"

	"contrib.go.opencensus.io/exporter/jaeger"
	"go.opencensus.io/trace"
)

func main() {
	// Port details: https://www.jaegertracing.io/docs/getting-started/
	agentEndpointURI := "localhost:6831"
	collectorEndpointURI := "http://localhost:14268/api/traces"

	je, err := jaeger.NewExporter(jaeger.Options{
		AgentEndpoint:          agentEndpointURI,
		CollectorEndpoint:      collectorEndpointURI,
		ServiceName:            "demo",
	})
	if err != nil {
		log.Fatalf("Failed to create the Jaeger exporter: %v", err)
	}

	// And now finally register it as a Trace Exporter
	trace.RegisterExporter(je)
}

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/