jaeger的相关知识

https://blog.csdn.net/douzizuibang/article/details/83312674
https://yq.aliyun.com/articles/514488
官网:https://www.jaegertracing.io/docs/1.7/
github上的jaeger: https://github.com/jaegertracing,https://github.com/jaegertracing/jaeger-kubernetes

介绍

Jaeger是Uber Technologies用GO语言开发的分布式跟踪系统,现已开源。它用于监视和排除基于微服务的分布式系统,包括:

  • 分布式上下文传播
  • 分布式事务监控
  • 根本原因分析
  • 服务依赖性分析
  • 性能/延迟优化

架构图

在这里插入图片描述

对OpenTracing的原生支持

Jaeger后端,Web UI和仪器库已经完全设计为支持OpenTracing标准。

  • 通过跨度参考将跟踪表示为有向非循环图(不仅仅是树)
  • 支持强类型span 标记和结构化日志
  • 通过行李支持通用分布式上下文传播机制

多个存储后端

Jaeger支持两个流行的开源NoSQL数据库作为跟踪存储后端:Cassandra 3.4+和Elasticsearch 6.x / 7.x. 正在进行使用其他数据库的社区实验,例如ScyllaDB,InfluxDB,Amazon DynamoDB。Jaeger还提供了一个简单的内存存储器,用于测试设置。

jaeger-agent(代理)

Jaege-agent client 与 collector 中间的代理层,监听发送过来的 spans 数据并批量发送至 collector。

jaeger-collector

Jaeger-collector接收发送自 jaeger-agent 的 trace 数据(或者可直接发送 zipkin spans 至 collector),验证、索引、转换及存储 trace 数据。

Jaeger的存储是一个可插拔的组件,目前支持Cassandra,Elasticsearch和Kafka。

jaeger-query

jaeger-query从storage 中查询 trace 及前端 ui 展示。

hotrod

测试案例部署。

基于k8s的jaeger安装

PS:因为需要使用到es所有与es与kibana、fluentd放入同一namespace

1.configmap 部署: jaeger-config.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: jaeger-configuration
  namespace: logging
  labels:
    app: jaeger
    jaeger-infra: configuration
data:
  span-storage-type: elasticsearch
  collector: |
    es:
      server-urls: http://elasticsearch:9200
      username: elastic
      password: changeme
    collector:
      zipkin:
        http-port: 9411
  query: |
    es:
      server-urls: http://elasticsearch:9200
      username: elastic

2. jaeger-query 部署安装: jaeger-query-deployment.yml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: jaeger-query
  namespace: logging
  labels:
    app: jaeger
    jaeger-infra: query-deployment
spec:
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: jaeger
        jaeger-infra: query-pod
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "16686"
    spec:
      containers:
        - image: jaegertracing/jaeger-query:latest
          name: jaeger-query
          args: ["--config-file=/conf/query.yaml"]
          ports:
            - containerPort: 16686
              protocol: TCP
          readinessProbe:
            httpGet:
              path: "/"
              port: 16687
          volumeMounts:
            - name: jaeger-configuration-volume
              mountPath: /conf
          env:
            - name: SPAN_STORAGE_TYPE
              valueFrom:
                configMapKeyRef:
                  name: jaeger-configuration
                  key: span-storage-type
      volumes:
        - configMap:
            name: jaeger-configuration
            items:
              - key: query
                path: query.yaml
          name: jaeger-configuration-volume

3.jaeger query service的安装:jaeger-query-service.yml

apiVersion: v1
kind: Service
metadata:
  name: jaeger-query
  namespace: logging
  labels:
    app: jaeger
    jaeger-infra: query-service
spec:
  ports:
    - name: jaeger-query
      port: 80
      protocol: TCP
      targetPort: 16686
  selector:
    jaeger-infra: query-pod

4.jaeger-collector 部署安装:jaeger-query-collector.yml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: jaeger-collector
  namespace: logging
  labels:
    app: jaeger
    jaeger-infra: collector-deployment
spec:
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: jaeger
        jaeger-infra: collector-pod
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "14268"
    spec:
      containers:
        - image: jaegertracing/jaeger-collector:latest
          name: jaeger-collector
          args: ["--config-file=/conf/collector.yaml"]
          ports:
            - containerPort: 14267
              protocol: TCP
            - containerPort: 14268
              protocol: TCP
            - containerPort: 9411
              protocol: TCP
          readinessProbe:
            httpGet:
              path: "/"
              port: 14269
          volumeMounts:
            - name: jaeger-configuration-volume
              mountPath: /conf
          env:
            - name: SPAN_STORAGE_TYPE
              valueFrom:
                configMapKeyRef:
                  name: jaeger-configuration
                  key: span-storage-type
      volumes:
        - configMap:
            name: jaeger-configuration
            items:
              - key: collector
                path: collector.yaml
          name: jaeger-configuration-volume

5. jaeger collector service的安装:jaeger-collector-service.yml

apiVersion: v1
kind: List
items:
  - apiVersion: v1
    kind: Service
    metadata:
      name: jaeger-collector
      namespace: logging
      labels:
        app: jaeger
        jaeger-infra: collector-service
    spec:
      ports:
        - name: jaeger-collector-tchannel
          port: 14267
          protocol: TCP
          targetPort: 14267
        - name: jaeger-collector-http
          port: 14268
          protocol: TCP
          targetPort: 14268
        - name: jaeger-collector-zipkin
          port: 9411
          protocol: TCP
          targetPort: 9411
      selector:
        jaeger-infra: collector-pod
      type: ClusterIP
  - apiVersion: v1
    kind: Service
    metadata:
      name: zipkin
      namespace: logging
      labels:
        app: jaeger
        jaeger-infra: zipkin-service
    spec:
      ports:
        - name: jaeger-collector-zipkin
          port: 9411
          protocol: TCP
          targetPort: 9411
      selector:
        jaeger-infra: collector-pod
      type: ClusterIP

6. 测试用例hotrod 与代理jaeger-agent的部署

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: hotrod
  namespace: logging
spec:
  template:
    metadata:
      labels:
        app: hotrod
    spec:
      containers:
        - image: jaegertracing/example-hotrod:latest
          name: hotrod
          ports:
            - containerPort: 8080
        - image: jaegertracing/jaeger-agent
          name: jaeger-agent
          ports:
            - containerPort: 5775
              protocol: UDP
            - containerPort: 5778
            - containerPort: 6831
              protocol: UDP
            - containerPort: 6832
              protocol: UDP
          command:
            - "/go/bin/agent-linux"
            - "--collector.host-port=jaeger-collector.logging:14267"
---
apiVersion: v1
kind: Service
metadata:
  namespace: logging
  labels:
    app: hotrod
  name: hotrod
spec:
  ports:
    - port: 8080
      targetPort: 8080
  selector:
    app: hotrod

---
apiVersion: v1
kind: Service
metadata:
  namespace: logging
  labels:
    app: hotrod
  name: jaeger-agent
spec:
  ports:
    - port: 6831
      targetPort: 6831
      protocol: UDP
  selector:
    app: hotrod

7.配置ingress 来访问服务,也可以使用NodePort的方式来访问

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kibana-ingress
  namespace: logging
  annotations:
    kubernets.io/ingress.class: "nginx"
spec:
  tls:
    - hosts:
        - kibana.xinchanedu.com
      secretName: kibana-secret
    - hosts:
        - jaeger.xinchanedu.com
      secretName: kibana-secret
    - hosts:
        - hotrod.xinchanedu.com
      secretName: kibana-secret
  rules:
    - host: kibana.xinchanedu.com
      http:
        paths:
          - path: /
            backend:
              serviceName: kibana
              servicePort: 5601
    - host: jaeger.xinchanedu.com
      http:
        paths:
          - path: /
            backend:
              serviceName: jaeger-query
              servicePort: 80
    - host: hotrod.xinchanedu.com
      http:
        paths:
          - path: /
            backend:
              serviceName: hotrod
              servicePort: 8080

使用docker启动jaeger 测试环境 所有数据都是存储到内存中

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:latest

Docker部署jaeger并使用elasticsearch作为存储引擎

若你安装的collector和elasticsearch是在同一台机器上,使用docker容易的--link命令就可以将collector和elasticsearch关联上,安装命令如下:

docker run -d --name jaeger-collector --restart=always --link elasticsearch -e SPAN_STORAGE_TYPE=elasticsearch -e ES_SERVER_URLS=http://172.26.155.215:9200 -e ES_USERNAME=elastic -p 14267:14267 -p 14268:14268 -p 9411:9411 jaegertracing/jaeger-collector

注意:
​ --link elasticsearch,代表docker 关联,该名字必须和你安装elasticsearch —name的名字相同
​ --SPAN_STORAGE_TYPE=elasticsearch 代表安装jaeger选择elasticsearch作为存储
-e ES_SERVER_URLS=http://elasticsearch:9200次条目代表你选择容器安装的elasticsearch的9200端口
-e ES_USERNAME elasticsearch的用户名:默认elastic,下同
-e ES_PASSWORD elasticsearch的密码  没有设置密码不用填

-e 其实就是代表的环境变量,其他变量你可以使用以下语句查看:

当然,一般生产环境你肯定不会将collector和elasticsearch安装到同一台机器,至少你可能会安装多个collector,所以,如何跨机器的用collector连接此elasticsearch呢?
你可以用用以下命令:

docker run -d --name jaeger-collector  --restart=always -e SPAN_STORAGE_TYPE=elasticsearch -e ES_SERVER_URLS=http://es部署机器的ip:9200 -e ES_USERNAME=elastic -p 14267:14267 -p 14268:14268 -p 9411:9411 jaegertracing/jaeger-collector

区别在于,你无需使用—link来进行容器互连,只需ES_SERVER_URLS填写对应的ip和port即可;


如出现以下错误:
"caller":"collector/main.go:102","msg":"Failed to init storage factory","error":"health check timeout: no Elasticsearch node available","errorVerbose":"no Elasticsearch node available
请检查elasticsearch地址是否正确

docker + query安装

同collector一样,若你安装的collector和elasticsearch是在同一台机器上,使用docker容易的–link命令就可以将query和elasticsearch关联上,安装命令如下:

docker run -d --name jaeger-query --restart=always --link elasticsearch -e SPAN_STORAGE_TYPE=elasticsearch -e ES_SERVER_URLS=http://172.26.155.215:9200 -p 16686:16686/tcp jaegertracing/jaeger-query

注意,ES_USERNAME、ES_PASSWORD这两个环境变量,当你的elasticsearch未设置账号密码时,你可以不填,也可以填上默认值,elasticsearch的默认ES_USERNAME=elastic,ES_PASSWORD=changeme

部署完成query之后,根据你暴露的端口号(-p 16686:16686/tcp),浏览器输入以下地址(将localhost换成你部署query的地址):
http://localhost:16686

注意:如果报elasticsearch以下错误
jaeger-query HTTP Error: search service failed: elastic: Error 400 (Bad Request): all shards failed [type=search_phase_execution_exception]
删除之前的ja索引后重新收集即可
curl -XDELETE 'http://172.26.155.215:9200/ja*' 

docker + agent安装

根据uber jaeger官网的架构,agent一般是和jaeger-client部署在一起,agent作为一个基础架构,每一台应用(接入jaeger-client的应用)所在的机器都需要部署一个agent;
根据数据采集原理,jaeger-client采集到数据之后,是通过UDP端口发送到agent的,jaeger-client和agent部署在一起的好处是UDP传输数据都在应用所在的机器,可避免UDP的跨网络传输,多一层安全保障。
当然,架构可能是多变的,你的agent可能不和jaeger-client所在的应用在一台机器,这个时候,jaeger-client就必须显示的指定其连接的agent的IP及port,具体做法后文jaeger-client对应模块会讲到。
前文提到,jaeger-client采集到数据之后,是通过UDP端口发送到agent的,agent接收到数据之后,使用Uber的Tchannel协议,将数据发送到collector,所以,agent是必须和collector相连的;

docker run -d  --name jaeger-agent --restart=always -p 5775:5775/udp -p 6831:6831/udp -p 6832:6832/udp -p 5778:5778/tcp jaegertracing/jaeger-agent --reporter.grpc.host-port=172.26.155.215:14267

如前文所述,你可能不止一个collector,你可能需要这样:
docker run -d  --name jaeger-agent --restart=always -p 5775:5775/udp -p 6831:6831/udp -p 6832:6832/udp -p 5778:5778/tcp jaegertracing/jaeger-agent --reporter.grpc.host-port=jaeger-collector-id1:14267,jaeger-collector-ip2:14267,jaeger-collector-ip3:14267

//--collector.host-port=collector jaeger-collector-id1:14267,jaeger-collector-ip2:14267,jaeger-collector-ip3:14267,用逗号分开,连接三个collector,这样的话,这三个collector只要一个存活,agent就可以吧数据传输完成,以避免单点故障
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