spring cloud 使用sleuth +zipkin 实例测试
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最近研究 spring cloud sleuth,这里使用3个应用,sleuth-server,另外就是sleuth-provider和sleuth-consumer,
源码是参考这个兄弟的http://www.cnblogs.com/skyblog/p/6213683.html,但是使用他的源码没有成功,是有问题滴,所以,亲测自己项目,
这是基本的配置,大神勿喷啊,小弟也不才,
直接代码:
1:cloud-sleuth-server项目:
pom.xml
<?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"><modelVersion>4.0.0</modelVersion><!-- spring boot基本环境 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.3.5.RELEASE</version></parent><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Brixton.RELEASE</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><groupId>spring.boot</groupId><artifactId>cloud-sleuth-server</artifactId><version>0.0.1</version><packaging>jar</packaging><name>cloud-sleuth-server</name><properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties><dependencies><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>io.zipkin</groupId> <artifactId>zipkin-ui</artifactId> </dependency> <dependency> <groupId>io.zipkin.java</groupId> <artifactId>zipkin-server</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> <exclusions> <exclusion> <artifactId>spring-boot-starter-tomcat</artifactId> <groupId>org.springframework.boot</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId></dependency> </dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>
这里最主要我一直错误就是,
一直是false,这说明并没往zipkin中插入,可是我是按照权威指南配置的啊,后来看了一些大神的代码,发现一个区别,就是
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zipkin</artifactId> <exclusions> <exclusion> <artifactId>spring-boot-starter-tomcat</artifactId> <groupId>org.springframework.boot</groupId> </exclusion> </exclusions> </dependency>
我是没有exclusion处理tomcat的,所以一直false,切记,因为我的3应用都是本地项目,这个错误很难发现的,所以记住了,
然后是application.yml文件:
spring: application: name: sleuthServer zipkin: enabled: true sleuth: sampler: percentage: 1.0server: port: 9411eureka: client:# register-with-eureka: true #是否将eureka自身作为应用注册到eureka注册中心# fetch-registry: true serviceUrl: defaultZone: http://172.1.1.1:9080/eureka/v2/ instance: prefer-ip-address: true这个ip是我的服务器的ip,是配置了eureka的服务器,这个可以不用,注意其中的采样率改成了1.0了
然后是启动类:
package cloud.sleuth.server;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;import zipkin.server.EnableZipkinServer;@SpringBootApplication@EnableZipkinServer@EnableEurekaClientpublic class SleuthServerApplication {public static void main(String[] args) {SpringApplication.run(SleuthServerApplication.class,args); }}===================================================================================
2:cloud-sleuth-provider项目:
pom.xml文件:
<?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"><modelVersion>4.0.0</modelVersion><!-- spring boot基本环境 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.3.5.RELEASE</version></parent><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Brixton.RELEASE</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><groupId>spring.boot</groupId><artifactId>cloud-sleuth-provider</artifactId><version>0.0.1</version><packaging>jar</packaging><name>cloud-sleuth-provider</name><properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-zipkin</artifactId></dependency><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-eureka</artifactId></dependency> </dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>这里注意一下,其实有了spring-cloud-starter-zipkin就不需要spring-cloud-starter-sleuth了,因为前者依赖了后者,
然后是application.yml文件:
spring: application: name: sleuthProvider zipkin: base-url: http://localhost:9411 enabled: trueserver: port: 8082eureka: client: register-with-eureka: true #是否将eureka自身作为应用注册到eureka注册中心 fetch-registry: true #为true时,可以启动,但报异常:Cannot execute request on any known server service-url: defaultZone: http://172.1.1.1:9080/eureka/v2/ instance: prefer-ip-address: true instance-id: ${spring.application.name}:${spring.application.instance_id:${server.port}}启动类:
package cloud.sleuth;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@EnableEurekaClient@SpringBootApplicationpublic class SleuthClientApplication {public static void main(String[] args) {SpringApplication.run(SleuthClientApplication.class, args);}}@RestControllerclass HiController {private static final Log log = LogFactory.getLog(HiController.class);@RequestMapping("/provider")public String hi() throws Exception {log.info("-------------------------provider");return "provider";}}
=====================================================================================
3.cloud-sleuth-consumer项目:
pom.xml文件:
<?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"><modelVersion>4.0.0</modelVersion><!-- spring boot基本环境 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.3.5.RELEASE</version></parent><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Brixton.RELEASE</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><groupId>spring.boot</groupId><artifactId>cloud-sleuth-consumer</artifactId><version>0.0.1</version><packaging>jar</packaging><name>cloud-sleuth-consumer</name><properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties><dependencies><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-zipkin</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> </dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>
application.yml文件:
、
spring: application: name: sleuthConsumer zipkin: base-url: http://localhost:9411 enabled: trueserver: port: 7900eureka: client: serviceUrl: defaultZone: http://172.1.1.1:9080/eureka/v2/ instance: prefer-ip-address: true启动类:
package cloud.sleuth;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Value;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;import org.springframework.context.annotation.Bean;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.client.RestTemplate;@EnableEurekaClient@SpringBootApplicationpublic class SleuthClientApplication {@Beanpublic RestTemplate restTemplate() {return new RestTemplate();}public static void main(String[] args) {SpringApplication.run(SleuthClientApplication.class, args);}}@RestControllerclass HomeController {private static final Log log = LogFactory.getLog(HomeController.class);@Autowiredprivate RestTemplate restTemplate;private String url="http://localhost:8082";@RequestMapping("/consumer")public String service1() throws Exception {log.info("consumer");String s = this.restTemplate.getForObject(url + "/provider", String.class);return s;}}然后在浏览器中http://localhost:7900/consumer就会返回provider的日志:“provider”,说明调用成功,然后http://localhost:9411//进入页面:
至此,简单的测试完成了。
在测试的过程中我们会发现,有时候,程序刚刚启动后,刷新几次,并不能看到任何数据,原因就是我们的spring-cloud-sleuth收集信息是有一定的比率的,默认的采样率是0.1,配置此值的方式在配置文件中增加spring.sleuth.sampler.percentage参数配置(如果不配置默认0.1),
如果我们调大此值为1,可以看到信息收集就更及时。
但是当这样调整后,我们会发现我们的rest接口调用速度比0.1的情况下慢了很多,
这种方式追踪服务调用链路会给我们业务程序性能带来一定的影响。
其实,我们仔细想想也可以总结出这种方式的几种缺陷
缺陷1:zipkin客户端向zipkin-server程序发送数据使用的是http的方式通信,每次发送的时候涉及到连接和发送过程。
缺陷2:当我们的zipkin-server程序关闭或者重启过程中,因为客户端收集信息的发送采用http的方式会被丢失。
针对以上两个明显的缺陷,改进的办法是
1、通信采用socket或者其他效率更高的通信方式。
2、客户端数据的发送尽量减少业务线程的时间消耗,采用异步等方式发送收集信息。
3、客户端与zipkin-server之间增加缓存类的中间件,例如redis、MQ等,在zipkin-server程序挂掉或重启过程中,客户端依旧可以正常的发送自己收集的信息。
相信采用以上三种方式会很大的提高我们的效率和可靠性。其实spring-cloud以及为我们提供采用MQ或redis等其他的采用socket方式通信,利用消息中间件或数据库缓存的实现方式。
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