Jaeger
Jaeger是一个基于opentracing规范的链路追踪工具,官方地址:https://www.jaegertracing.io/
jaeger架构
jaeger分为5个模块,分别为:
1:Jaeger-client
jaeger-client即是代码层客户端,我们通过引入sdk,通过调用代码,将数据传输到agent层
2:Jaeger-Agent
jaeger-agent将client的数据收集,然后批量上传到Collector
3:Jaeger-Collector
将agent的数据进行收集,处理,索引,然后存储到数据库中
4:Data Store
最终存储链路数据,支持Cassandra,Elasticsearch,Kafka 和内存存储(生产环境不建议)方式
5:Query&UI
数据查询和展现层
6:jaeger-ingester
直接将kafka数据写入到数据存储端
安装
安装方式有很多,本文将使用docker Ubuntu环境手动安装,觉得麻烦的可以通过docker拉取镜像,一次性安装:
代码语言：javascript复制docker pull jaegertracing/all-in-one:1.12
docker run -d --name jaeger
-e COLLECTOR_ZIPKIN_HTTP_PORT=9411
-p 5775:5775/udp
-p 6831:6831/udp
-p 6832:6832/udp
-p 5778:5778
-p 16686:16686
-p 14268:14268
-p 9411:9411
jaegertracing/all-in-one:1.12由上面的架构可看出,Jaeger只需要安装collector和query&ui就可以直接运行了,客户端不通过agent,直接到收集器
首先运行一个Ubuntu:
代码语言：javascript复制docker run -itd --name=jaeger-study
-p 5775:5775/udp
-p 6831:6831/udp
-p 6832:6832/udp
-p 5778:5778
-p 16686:16686
-p 14268:14268
-p 9411:9411
ubuntu bash
docker exec -it jaeger-study bash目前不清楚开放这些端口有啥用,先开着以备不时之需
初始化Ubuntu 包管理:
代码语言：javascript复制apt-get update
apt-get install -y wget
下载二进制执行包:
二进制包下载地址:https://github.com/jaegertracing/jaeger/releases/
代码语言：javascript复制wget https://github.com/jaegertracing/jaeger/releases/download/v1.32.0/jaeger-1.32.0-linux-amd64.tar.gz解压后:
代码语言：javascript复制root@8f0790b17e84:/tmp/jaeger-1.32.0# tar -zvxf jaeger-1.32.0-linux-amd64.tar.gz
jaeger-1.32.0-linux-amd64/
jaeger-1.32.0-linux-amd64/example-hotrod
jaeger-1.32.0-linux-amd64/jaeger-ingester
jaeger-1.32.0-linux-amd64/jaeger-collector
jaeger-1.32.0-linux-amd64/jaeger-agent
jaeger-1.32.0-linux-amd64/jaeger-query
jaeger-1.32.0-linux-amd64/jaeger-all-in-one启动elasticsearch
代码语言：javascript复制docker pull elasticsearch:7.8.0
docker run -itd -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" --name elastic_search elasticsearch:7.8.0启动elasticsearch成功后,需要与Jaeger 容器互通,通过创建个network实现:
代码语言：javascript复制(base) tioncico@appledeMacBook-Pro ~ % docker network create jaeger_network
ceec8b0ea1f40f12c0d7f7e3d2e4ee386351d8cb57d3203da8f4705b825aefd8
(base) tioncico@appledeMacBook-Pro ~ % docker network connect jaeger_network jaeger-study
(base) tioncico@appledeMacBook-Pro ~ % docker network connect jaeger_network elastic_search
(base) tioncico@appledeMacBook-Pro ~ %启动collector:
代码语言：javascript复制./jaeger-collector --span-storage.type=elasticsearch --es.server-urls=http://elastic_search:9200将监听以下端口:
- 14267 tcp agent发送jaeger.thrift格式数据
- 14250 tcp agent发送proto格式数据（背后gRPC)
- 14268 http 直接接受客户端数据
- 14269 http 健康检查
启动agent
代码语言：javascript复制./jaeger-agent --reporter.grpc.host-port=127.0.0.1:14250启动成功后,将监听:
- 5775 UDP协议，接收兼容zipkin的协议数据
- 6831 UDP协议，接收兼容jaeger的兼容协议
- 6832 UDP协议，接收jaeger的二进制协议
- 5778 HTTP协议，数据量大不建议使用
通过Jaeger-client直接传输到agent:
代码语言：javascript复制package main
import (
"context"
"fmt"
"io"
"time"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/log"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/config"
)
/**
初始化
*/
func initJaeger(service string) (opentracing.Tracer, io.Closer) {
cfg := &config.Configuration{
Sampler: &config.SamplerConfig{
Type: "const",
Param: 1,
},
Reporter: &config.ReporterConfig{
LogSpans: true,
LocalAgentHostPort: "127.0.0.1:6831",
},
ServiceName: service,
}
tracer, closer, err := cfg.NewTracer(config.Logger(jaeger.StdLogger))
if err != nil {
panic(fmt.Sprintf("Error: connot init Jaeger: %vn", err))
}
return tracer, closer
}
func main() {
tracer, closer := initJaeger("jager-test-demo")
defer closer.Close()
//设置全局的tracer
opentracing.SetGlobalTracer(tracer)
//设置顶级span
span := tracer.StartSpan("main")
ctx := opentracing.ContextWithSpan(context.Background(), span)
//调用栈1,例如查询数据
_ = selectData("test", ctx)
//调用栈2,例如写入日志
_ = writeLog("log", ctx)
span.Finish()
fmt.Println("调用栈完成")
}
func selectData(data string, ctx context.Context) (reply string) {
//创建子span
span, _ := opentracing.StartSpanFromContext(ctx, "selectData")
defer span.Finish() //结束后调用完成
span.SetTag("data", data)
span.SetTag("reply", reply)
span.LogFields(
log.String("event", "selectData"),
log.String("value", "666666"),
)
time.Sleep(time.Second / 2) //模拟查询了2秒
reply = "select data"
return
}
func writeLog(data string, ctx context.Context) (reply string) {
//创建子span
span, _ := opentracing.StartSpanFromContext(ctx, "writeLog")
defer span.Finish() //结束后调用完成
span.LogFields(
log.String("log", data),
)
reply = "writeLog"
return
}query&ui查看链路追踪日志
启动query:
代码语言：javascript复制./jaeger-query --span-storage.type=elasticsearch --es.server-urls=http://elastic_search:9200打开:http://127.0.0.1:16686/ 网页
即可查看到链路追踪日志
本文为仙士可原创文章,转载无需和我联系,但请注明来自仙士可博客www.php20.cn
