spring boot集成jaeger实现链路管理

环境：
spring boot:2.6.2
opentracing-spring-jaeger-cloud-starter:3.2.2
jaeger-client:1.6.0

<!--jaeager-->
<dependency>
    <groupId>io.opentracing.contrib</groupId>
    <artifactId>opentracing-spring-jaeger-cloud-starter</artifactId>
    <version>3.2.2</version>
</dependency>
<dependency>
    <groupId>io.jaegertracing</groupId>
    <artifactId>jaeger-client</artifactId>
    <version>1.6.0</version>
</dependency>

注意:
opentracing-spring-jaeger-cloud-starter不支持最新版本的spring-cloud-starter-openfeign。
spring-cloud-starter-openfeign中的LoadBalancerFeignClient被移除了。
所以我们需要自己创建下,直接复制

package org.springframework.cloud.openfeign.ribbon;
public class CachingSpringLoadBalancerFactory {
}

package org.springframework.cloud.openfeign.ribbon;
import feign.Client;
public class LoadBalancerFeignClient {
    public LoadBalancerFeignClient(Client delegate, CachingSpringLoadBalancerFactory lbClientFactory, SpringClientFactory clientFactory) {
        throw new UnsupportedOperationException();
    }

    public Client getDelegate() {
        throw new UnsupportedOperationException();
    }
}

package org.springframework.cloud.openfeign.ribbon;

public class SpringClientFactory {
}

docker直接部署jaeger

docker run -d --name jaeger \
  -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
  -p 5775:5775/udp \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 14250:14250 \
  -p 14268:14268 \
  -p 14269:14269 \
  -p 9411:9411 \
  jaegertracing/all-in-one:1.33

配置jeager的相关参数

opentracing:
  jaeger:
    enabled: true # 启用对接Jaeger（可以不配置，默认true）
    enable128-bit-traces: true # 使用短TraceID（可以不配置）
    udp-sender:
    udp-sender:
      host: 192.168.5.110  # 配置Jaeger服务器地址

jeager-ui地址: http://localhost:16686

其他链路追踪对比对比图片

如果只需要traceId 可以只需要引入

<!--链路追踪 start-->
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-sleuth</artifactId>
      <version>2.0.0.RELEASE</version>
      <type>pom</type>
      <scope>import</scope>
  </dependency>
<!--链路追踪 end-->

即可获取到

import brave.Tracer;

@Service
public class Breadcrumb {

  @Autowired
  private Tracer tracer;

  public String breadcrumbId() {
    return tracer.currentSpan().context().traceIdString();
  }
}