SpringCloud（十五）springCloud sleuth 分布式链路跟踪

由 匿名 (未验证) 提交于 2019-12-03 00:29:01

前言：


一些感念：

  • Span：基本工作单元，例如，在一个新建的span中发送一个RPC等同于发送一个回应请求给RPC，span通过一个64位ID唯一标识，trace以另一个64位ID表示，span还有其他数据信息，比如摘要、时间戳事件、关键值注释(tags)、span的ID、以及进度ID(通常是IP地址)
    span在不断的启动和停止，同时记录了时间信息，当你创建了一个span，你必须在未来的某个时刻停止它。
  • Trace：一系列spans组成的一个树状结构，例如，如果你正在跑一个分布式大数据工程，你可能需要创建一个trace。
  • Annotation：用来及时记录一个事件的存在，一些核心annotations用来定义一个请求的开始和结束
    • cs - Client Sent -客户端发起一个请求，这个annotion描述了这个span的开始
    • sr - Server Received -服务端获得请求并准备开始处理它，如果将其sr减去cs时间戳便可得到网络延迟
    • ss - Server Sent -注解表明请求处理的完成(当请求返回客户端)，如果ss减去sr时间戳便可得到服务端需要的处理请求时间
    • cr - Client Received -表明span的结束，客户端成功接收到服务端的回复，如果cr减去cs时间戳便可得到客户端从服务端获取回复的所有所需时间
      将Span和Trace在一个系统中使用Zipkin注解的过程图形化：

代码：

在springboot2.0，springcloud Finchley版本，不允许自己建zipkin server了，可以用jar包自己跑，也可以直接用docker运行，https://github.com/openzipkin/zipkin#quick-start 地址。

我就用docker了

docker run -d -p 9411:9411 --name zipkin openzipkin/zipkin

启动后访问 http://192.168.94.151:9411/zipkin/




然后创建一个eureka,一个两个有调用关系的为服务

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <parent>         <artifactId>springcloud16-zipkin</artifactId>         <groupId>com.xhx.springcloud</groupId>         <version>0.0.1-SNAPSHOT</version>     </parent>     <modelVersion>4.0.0</modelVersion>      <artifactId>eureka-server</artifactId>      <dependencies>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>         </dependency>     </dependencies>  </project>

application.yml

spring:   application:     name: eureka-server server:   port: 8761 eureka:   instance:     hostname: localhost   client:     register-with-eureka: false     fetch-registry: false     service-url:       default-zone: http://${eureka.instance.hostname}:${server.port}/eureka

启动类：

package com.xhx.springcloud;  import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;  /**  * xuhaixing  * 2018/6/16 16:34  */ @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication {     public static void main(String[] args) {         SpringApplication.run(EurekaServerApplication.class,args);     } }

pom.xml，增加sleuth和zipkin两个包

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <parent>         <artifactId>springcloud16-zipkin</artifactId>         <groupId>com.xhx.springcloud</groupId>         <version>0.0.1-SNAPSHOT</version>     </parent>     <modelVersion>4.0.0</modelVersion>      <artifactId>user-service</artifactId>      <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-sleuth</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-zipkin</artifactId>         </dependency>     </dependencies>  </project>

application.yml，base-url指定zipkin的地址

spring:   application:     name: user-service   zipkin:     base-url: http://192.168.94.151:9411     #discovery-client-enabled: true    # service:       #name: zipkin-service     enabled: true server:   port: 8080 eureka:   client:     service-url:       default-zone: http://locahost:8761/eureka feign:   hystrix:     enabled: true

启动类：

package com.xhx.springcloud;  import org.springframework.boot.SpringApplication; import org.springframework.cloud.client.SpringCloudApplication; import org.springframework.cloud.openfeign.EnableFeignClients;   /**  * xuhaixing  * 2018/6/16 17:04  */ @SpringCloudApplication @EnableFeignClients public class UserServiceApplication {     public static void main(String[] args) {         SpringApplication.run(UserServiceApplication.class,args);     } }
提供接口的controller
package com.xhx.springcloud.controller;  import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController;  import java.util.HashMap; import java.util.Map;  /**  * xuhaixing  * 2018/6/16 17:09  */ @RestController @RequestMapping(value = "user") public class UserController {       @RequestMapping(value = "getUserInfo",method = RequestMethod.POST)     public Map<String, String> getUserInfo(){         Map<String,String> user = new HashMap<>();         user.put("name","xuhaixing");         user.put("gender","man");         return user;     } }

服务消费者

pom.xml和前面一样加入sleuth和zipkin

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <parent>         <artifactId>springcloud16-zipkin</artifactId>         <groupId>com.xhx.springcloud</groupId>         <version>0.0.1-SNAPSHOT</version>     </parent>     <modelVersion>4.0.0</modelVersion>      <artifactId>order-service</artifactId>      <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-sleuth</artifactId>         </dependency>          <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-sleuth-zipkin</artifactId>         </dependency>      </dependencies>  </project>

application.yml

probability是被zipkin收集的概率，1为全部收集，因为现在是直接用http方式发送数据并且放在内存中，所以会影响性能。可以用消息队列或者mysql收集服务链路信息。

spring:   application:     name: order-service   zipkin:       #discovery-client-enabled: true       #service:         #name: zipkin-service       enabled: true       base-url: http://192.168.94.151:9411   sleuth:     sampler:       probability: 1 server:   port: 8086 eureka:   client:     service-url:       default-zone: http://locahost:8761/eureka feign:   hystrix:     enabled: true

feign

package com.xhx.springcloud.api;  import com.alibaba.fastjson.JSONObject; import com.xhx.springcloud.hystrix.UserInfoApiHytrix; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod;  import java.util.Map;  /**  * xuhaixing  * 2018/6/16 17:19  */ @FeignClient(value = "user-service",path = "user",fallback = UserInfoApiHytrix.class) public interface UserInfoApi {     @RequestMapping(value = "getUserInfo",method = RequestMethod.POST)     JSONObject getUserInfo(); }

controller

package com.xhx.springcloud.controller;  import com.alibaba.fastjson.JSONObject; import com.xhx.springcloud.api.UserInfoApi; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController;  import java.util.Optional;  /**  * xuhaixing  * 2018/6/16 17:19  */ @RestController @RequestMapping(value = "order") public class OrderController {      @Autowired     private UserInfoApi userInfoApi;      @RequestMapping(value = "getUserOrder",method = RequestMethod.POST)     public JSONObject getUserOrder(){         JSONObject userInfo = userInfoApi.getUserInfo();         Optional.ofNullable(userInfo).ifPresent(user->user.put("orderMoney",999));         return userInfo;     } }

hystrix

package com.xhx.springcloud.hystrix;  import com.alibaba.fastjson.JSONObject; import com.xhx.springcloud.api.UserInfoApi; import org.springframework.stereotype.Component;  import java.util.Map;  /**  * xuhaixing  * 2018/6/16 17:20  */ @Component public class UserInfoApiHytrix implements UserInfoApi {     @Override     public JSONObject getUserInfo() {         return null;     } }

请求一下


打开zipkin






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eureka
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