golang使用jaeger进行链路追踪

docker pull jaegertracing/all-in-one:latest
docker run -d --name myjaeger -p 6831:6831/udp -p 16686:16686 jaegertracing/all-in-one:latest

package main

import (
	"time"

	opentracing "github.com/opentracing/opentracing-go"
	"github.com/uber/jaeger-client-go"
	jaegercfg "github.com/uber/jaeger-client-go/config"
	jaegerlog "github.com/uber/jaeger-client-go/log"
)

func main() {
	cfg := jaegercfg.Configuration{
		Sampler: &jaegercfg.SamplerConfig{
			Type:  jaeger.SamplerTypeConst,
			Param: 1,
		},
		Reporter: &jaegercfg.ReporterConfig{
			LogSpans:           true,
			LocalAgentHostPort: "127.0.0.1:6831",
		},
		ServiceName: "deardai-shop",
	}
	tracer, closer, err := cfg.NewTracer(jaegercfg.Logger(jaegerlog.StdLogger))
	if err != nil {
		panic(err)
	}
	defer closer.Close()

	//单个追踪
	single_span := tracer.StartSpan("single-span")
	time.Sleep(time.Second * 3)
	single_span.Finish()

	//父子追踪

	parentSpan := tracer.StartSpan("main")

	span := tracer.StartSpan("func1", opentracing.ChildOf(parentSpan.Context()))
	time.Sleep(time.Second)
	span.Finish()
	span2 := tracer.StartSpan("func2", opentracing.ChildOf(span.Context()))
	time.Sleep(time.Second * 3)
	span2.Finish()

	parentSpan.Finish()
}