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README
Apache-2.0

SpringBoot之微服务日志链路追踪

简介

在微服务里,业务出现问题或者程序出的任何问题,都少不了查看日志,一般我们使用 ELK 相关的日志收集工具,服务多的情况下,业务问题也是有些难以排查,只能确定大致时间定位相关日志。log-trace-spring-boot-starter 解决多个服务调用日志的问题,它可以将一个完整的调用链给整合为一个完整有序的日志。

支持组件:

  • zuul 调用
  • feign 调用
  • restTemplate 调用
  • dobbo 调用

日志输出格式:

2022-04-09 22:16:05.796  INFO [log-trace-service-a-demo,ac8ffaaed5f343da,log-trace-zuul-demo,,] 88948 --- [nio-8081-exec-7] c.p.l.t.service.a.demo.TestController    : controller test2 执行 ac8ffaaed5f343da
2022-04-09 22:16:05.569  INFO [log-trace-service-a-demo,04cf5392dc5c4881,log-trace-zuul-demo,,] 88948 --- [nio-8081-exec-9] c.p.l.t.service.a.demo.TestController    : controller test2 执行 04cf5392dc5c4881
2022-04-09 22:16:05.183  INFO [log-trace-service-a-demo,86b5c555ce4f4451,log-trace-zuul-demo,,] 88948 --- [nio-8081-exec-1] c.p.l.t.service.a.demo.TestController    : controller test2 执行 86b5c555ce4f4451

我们可以通过 86b5c555ce4f4451 id 进行查询链路上的所有日志信息。

log-trace-service-a-demo 为当前应用。 log-trace-zuul-demo 为上游应用。

当然这些参数可以基于业务定制的。

功能使用

添加依赖

<dependency>
  <groupId>com.pig4cloud.plugin</groupId>
  <artifactId>log-trace-spring-boot-starter</artifactId>
  <version>1.1.0</version>
</dependency>

配置应用

这里以3个微服务来举例子。

  1. log-trace-zuul-demo 充当网关功能
  2. log-trace-service-a-demo 充当服务A
  3. log-trace-service-b-demo 充当服务B

调用链路为:

log-trace-zuul-demo -> log-trace-service-a-demo TestController#test -> log-trace-service-b-demo TestController#test

访问网关地址: http://127.0.0.1:8000/a/test

网关日志如下:

2022-04-09 22:16:05.434 DEBUG [33b07a9c5f324375,this] 89996 --- [nio-8000-exec-1] c.p.l.t.s.i.zuul.TracePreZuulFilter      : zuul traceid 33b07a9c5f324375

网关转发至服务A

服务A 日志如下:

2022-04-09 22:16:05.476  INFO [log-trace-service-a-demo,33b07a9c5f324375,log-trace-zuul-demo,,] 88948 --- [nio-8081-exec-5] c.p.l.t.service.a.demo.TestController    : controller test2 执行 33b07a9c5f324375

服务A 调用 服务B

服务B 日志如下:

2022-04-09 22:16:05.478  INFO [log-trace-service-b-demo,33b07a9c5f324375,log-trace-service-a-demo,,] 88952 --- [nio-8082-exec-3] c.p.l.t.servcie.b.demo.TestController    : header traceId 33b07a9c5f324375
2022-04-09 22:16:05.478  INFO [log-trace-service-b-demo,33b07a9c5f324375,log-trace-service-a-demo,,] 88952 --- [nio-8082-exec-3] c.p.l.t.servcie.b.demo.TestController    : controller test 执行 33b07a9c5f324375
2022-04-09 22:16:05.478  INFO [log-trace-service-b-demo,33b07a9c5f324375,log-trace-service-a-demo,,] 88952 --- [nio-8082-exec-3] c.p.l.trace.servcie.b.demo.TestService   : test 方法执行 33b07a9c5f324375
2022-04-09 22:16:05.478  INFO [log-trace-service-b-demo,33b07a9c5f324375,log-trace-service-a-demo,,] 88952 --- [nio-8082-exec-3] c.p.l.trace.servcie.b.demo.TestService   : test1 方法执行 33b07a9c5f324375

这样可以在第三方日志平台按照一个id进行查询了。

ELK 通过 33b07a9c5f324375 id 查询出相关的所有链路调用。

配置输出格式

目前支持以上参数:

X-B3-ParentName 上游服务名称
X-B3-TraceId 为一个请求分配的ID号,用来标识一条请求链路。

通过 application.properties 进行配置。

spring.trace.log.format=X-B3-TraceId,X-B3-ParentName


`spring.trace.log.format` 配置参数顺序将影响日志输出格式。

不配置将按照默认格式输出。

日志输出如下:

2022-04-09 22:15:57.434 DEBUG [33b07a9c5f324375,this] 89996 --- [nio-8000-exec-1] c.p.l.t.s.i.zuul.TracePreZuulFilter      : zuul traceid 33b07a9c5f324375
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