SpringCloud Sleuth
1.定义
Sleuth(分布式请求链路跟踪):提供了一套完整的服务跟踪解决方案,也兼容zipkin。
参考网址:https://github.com/spring-cloud/spring-cloud-sleuth
2.项目开发
源代码:https://github.com/zhongyushi-git/cloud-sleuth-demo.git
2.1环境搭建
这里需要下载zipkin的jar才能使用,以2.12.9版本为例(其他版本可能有所差别),若无法下载,可在阿里云maven仓库下载。
1)zipkin下载地址:https://dl.bintray.com/openzipkin/maven/io/zipkin/java/zipkin-server/2.14.1/zipkin-server-2.14.1-exec.jar
2)在下载的jar目录下执行命令
java -jar zipkin-server-2.14.1-exec.jar
看到下图说明配置成功
3)访问http://localhost:9411/zipkin/可看到相关的页面,主要用来查看请求的调用记录的。
2.2父工程搭建
创建一个maven的父工程cloud-sleuth-demo,导入依赖并指定版本
<properties> <spring.boot.version>2.2.2.RELEASE</spring.boot.version> <spring.cloud.version>Hoxton.SR1</spring.cloud.version> </properties> <!-- 依赖管理,父工程锁定版本--> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>${spring.boot.version}</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring.cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>
2.3服务提供者模块
1)创建一个子工程cloud-provider8001作为服务消费者,导入依赖
<dependencies> <!--web--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-consul-discovery</artifactId> </dependency> <!--包含了sleuth+zipkin--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zipkin</artifactId> </dependency> </dependencies>
2)yml配置
server: port: 8001 spring: application: name: cloud-provider cloud: consul: host: localhost port: 8500 discovery: service-name: ${spring.application.name} zipkin: #监控地查看址 base-url: http://localhost:9411 sleuth: sampler: #采样率 probability: 1
里面主要是配置了ziplin和consul的相关信息。
3)创建包com.zys.cloud,包下创建启动类
package com.zys.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; @SpringBootApplication @EnableDiscoveryClient public class ProviderMain8001 { public static void main(String[] args) { SpringApplication.run(ProviderMain8001.class, args); } }
4)在包下新建controller接口
package com.zys.cloud.controller; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; @RestController public class UserController { @Value("${server.port}") private String port; @GetMapping("/user/get") public String get() { return "provider port is :" + port; } }
2.4服务消费者模块
1)创建一个子工程cloud-provider8001作为服务消费者,导入依赖
<dependencies> <!--web--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-consul-discovery</artifactId> </dependency> <!--feign--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <!--包含了sleuth+zipkin--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zipkin</artifactId> </dependency>
2)yml配置
server: port: 80 spring: application: name: cloud-consumer cloud: consul: host: localhost port: 8500 discovery: service-name: ${spring.application.name} zipkin: #监控地查看址 base-url: http://localhost:9411 sleuth: sampler: #采样率 probability: 1 feign: client: config: #指定全局 default: #连接超时时间 connectTimeout: 5000 #服务等待时间 readTimeout: 5000 loggerLevel: full
3)创建包com.zys.cloud,包下创建启动类
package com.zys.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableDiscoveryClient @EnableFeignClients public class ConsumerMain80 { public static void main(String[] args) { SpringApplication.run(ConsumerMain80.class, args); } }
4)在包下新建client的客户端
package com.zys.cloud.client; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.GetMapping; //指定微服务名称 @FeignClient(value = "cloud-provider") public interface UserClient { @GetMapping("/user/get") String get(); }
5)在包下新建controller接口
package com.zys.cloud.controller; import com.zys.cloud.client.UserClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController @RequestMapping("/consumer") public class UserController { @Resource private UserClient userClient; @GetMapping("/get") public String get(){ return userClient.get(); } }
2.5测试
先启动服务提供者,再启动服务消费者。访问http://localhost/consumer/get,然后再回到zipkin的页面,发现服务名多了两个,分别是设置的消费者和生产者。
选择一个服务后点击查找,就会显示出链路信息