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OpenTelemetry Collector Demo

Introduction

OpenTelemetry Collector+Jaeger+Prometheus的可观测案例

  • Gateway ：Nginx
  • 前端：Java SpringBoot Web + OpenTelemetry + Jaeger Trace Exporter + Prometheus Metric Exporter
  • 后端：OpenTelemetry Collector 、Jaeger UI 、Prometheus UI

深入了解可观测体系下Traces、Metrics采集、运行原理
演示地址 http://www.opentelemetry.cool/collector/demo

  • Alt Text

Architecture

image.png

Tracing 效果图

image.png

Prometheus 采集Metric

prometheus.jpg

框架列表

Library/Framework Versions 备注
opentelemetry-collector-contrib 0.74.0 ​
opentelemetry-api 1.9.1 ​
opentelemetry-sdk 1.9.1 ​
opentelemetry-exporter-jaeger 1.9.1 ​
jaegertracing all-in-one:1.29 docker镜像
spring-boot 2.6.2

Linux

  • Docker 环境，三个服务部署在一台服务器上，网络Host模式
## down
docker-compose -f /path/docker-compose-collector.yml  down
## start
docker-compose -f /path/docker-compose-collector.yml  up -d

Windows

具体看这个Issue： windows系统无法对docker容器进行端口映射的问题

Mac

Mac 用Docker Host 模式不支持的，请把 OpenTelemetry Collector、Jaeger 端口映射方式部署
There is no docker0 bridge on the host

采样 Sampling

只上报异常链路采样Demo

processors:
  batch:
  tail_sampling:
    ##decision_wait: 10s
    ##num_traces: 100
    ##expected_new_traces_per_sec: 100
    policies:
      [
          {
            name: test-policy-5,
            type: status_code,
            status_code: {status_codes: [ERROR]}
          }
      ]
service:
  extensions: [pprof,health_check]
  pipelines:
    traces:
      receivers: [otlp]
      processors: [tail_sampling]
      exporters: [jaeger]

采样的效果

  • 采样前: image.png
  • 采样后: Processor 处理器添加了尾部取样 processors: [tail_sampling] image.png

开启Collector 下的Logging Exporter

  • Collector 添加 Exporter: [logging]
exporters:
 ##设置exporters上报 collector 控制台信息
 logging:
  loglevel: "debug"
  
  pipelines:
    traces:
      receivers: [otlp]
      processors: [tail_sampling]
      exporters: [jaeger,logging]
    metrics:
      receivers: [otlp]
      processors: [batch]
      exporters: [prometheus,logging]
  • 生效后: Collector 的日志控制台打印完整的上报链路结构 span.jpg

更多Collector 插件的用法

开启日志 debug 模式

Version 0.36 and above:

Set the log level in the config service::telemetry::logs

service:
  telemetry:
    logs:
      level: "debug"

重新编译Java 项目

Maven 编译Java 程序

mvn package -DskipTests=true
  • target下把对应jar包重命名java-demo.jar，放到Dockerfile文件同级目录
  • Docker默认网络方式是Host模式、将Spring Boot 的配置文件otel-collector-java/src/main/resources/application-test.yml 的 host 设置成你的内网 IP，配置SDK 上报Jaeger服务器地址
trace:
 sdk:
  exporter:
   host: "127.0.0.1"
   port: "14250"

区分环境部署

  • Dockerfile ENTRYPOINT 中添加环境变量
"-Dspring.profiles.active=test"

Documentation

https://github.com/open-telemetry/opentelemetry-java-instrumentation
https://www.jaegertracing.io/docs/1.29/getting-started/
https://opentelemetry.io/docs/
https://github.com/open-telemetry/opentelemetry-java
https://github.com/open-telemetry/opentelemetry-collector
opentelemetry-collector tailsamplingprocessor

联系

如果有什么疑问和建议，欢迎提交issues，我会第一时间回复