之前实现的熔断器的配置,SpringCloud还提供了熔断器的可视化界面仪表盘Hystrix Dashboard功能,这里配置的时候踩了一些坑,这边记录下。
之前熔断有通过Ribbon和Feign两种方式实现,这边可以通过仪表盘监控这两种方式的熔断。项目依旧基于之前的hystrix项目:
hystrix实现
目录
一、配置仪表盘
二、配置监控方
1、Ribbon方式
2、Feign方式
在工程中新建新的module,和之前项目创建方式一致。在组件选择中,选上hystrix,Hystrix Dashboard。这里建议选上eureka server和eureka Discovery。
创建完之后在启动类HystrixDashboarApplication上面加上注解@EnableHystrixDashboard
package com.hystrixdashboar;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.SpringCloudApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboarApplication {
public static void main(String[] args) {
SpringApplication.run(HystrixDashboarApplication.class, args);
}
}
在对应的pom.xml 文件中加上:
org.springframework.boot
spring-boot-starter-actuator
我这边的pom.xml文件(我这里配置了mysql)为:
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.3.RELEASE
com.hystrixdashboar
hystrixdashboar
0.0.1-SNAPSHOT
hystrixdashboar
Demo project for Spring Boot
1.8
Greenwich.RELEASE
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-web
org.springframework.cloud
spring-cloud-starter-netflix-eureka-client
org.springframework.cloud
spring-cloud-starter-netflix-eureka-server
org.springframework.cloud
spring-cloud-starter-netflix-hystrix
org.springframework.cloud
spring-cloud-starter-netflix-hystrix-dashboard
org.springframework.cloud
spring-cloud-starter-netflix-ribbon
org.springframework.boot
spring-boot-starter-actuator
mysql
mysql-connector-java
runtime
org.springframework.boot
spring-boot-starter-test
test
org.springframework.cloud
spring-cloud-dependencies
${spring-cloud.version}
pom
import
org.springframework.boot
spring-boot-maven-plugin
spring-milestones
Spring Milestones
https://repo.spring.io/milestone
然后是application.properties配置文件,配置端口号和服务名称:
server.port = 10030
spring.application.name = SPRING-CLOUD-HYSTRIX-DASHBOARD
eureka.client.serviceUrl.defaultZone= http://localhost:12345/eureka/
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/testmysql
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
这里有第一个坑:如果之前有其他端口作为cloud eureka服务器的话,建议加上eureka.client.serviceUrl.defaultZone的配置,不然在启动的时候一直会报错。
这样Hystrix Dashboard这个module就弄好了,之后就是配置它监测的Ribbon或者feign了。
在项目的负载均衡Ribbon模块的pom.xml中加上actuator的配置:
org.springframework.boot
spring-boot-starter-actuator
在Ribbon的启动类上加上注解@EnableCircuitBreaker。
第二个坑:如果用的springboot 版本是2.0及以上的,在ribbon启动类里面要加上下面这段代码:
@Bean
public ServletRegistrationBean getServlet(){
HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
registrationBean.setLoadOnStartup(1);
registrationBean.addUrlMappings("/actuator/hystrix.stream");
registrationBean.setName("HystrixMetricsStreamServlet");
return registrationBean;
}
我这边最后Ribbon启动类代码是:
package com.cloud.ribbonservice;
import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableDiscoveryClient
@EnableHystrix
@EnableCircuitBreaker
public class RibbonserviceApplication {
public static void main(String[] args) {
SpringApplication.run(RibbonserviceApplication.class, args);
}
@Bean
@LoadBalanced
RestTemplate restTemplate() {
return new RestTemplate();
}
@Bean
public IRule ribbonRule() {
return new RandomRule(); //这里配置策略,和配置文件对应
}
@Bean
public ServletRegistrationBean getServlet(){
HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
registrationBean.setLoadOnStartup(1);
registrationBean.addUrlMappings("/actuator/hystrix.stream");
registrationBean.setName("HystrixMetricsStreamServlet");
return registrationBean;
}
}
然后在配置文件里面加上下面这段配置:
management.endpoints.web.exposure.include= '*'
management.endpoint.health.show-details= ALWAYS
这边最后的application.properties文件内容是(我这边有导入mysql,所以有datasource内容):
server.port = 11000
eureka.client.serviceUrl.defaultZone= http://localhost:12345/eureka/
spring.application.name= SPRING-CLIENT-02
SPRING-CLIENT-01.ribbon.NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/testmysql
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
management.endpoints.web.exposure.include= '*'
management.endpoint.health.show-details= ALWAYS
然后就依次运行eureka sever,eureka client,ribbon,和 Hystrix Dashboard服务。
我这边 Hystrix Dashboard配置的端口是10030。
第三个注意的地方是:由于监控的是ribbon,所以先要在浏览器中调用下ribbon里面的服务。这个参照之前hystrix文章写的:在浏览器中输入:
http://localhost:10010/getInfoTwo
调用一下。
然后在浏览器中输入 Hystrix Dashboard的本地地址:
http://localhost:10030/hystrix
显示的界面就是:
这个是说明不同情况下不同的请求地址,前两个是对于集群模式使用的,最后一个是单节点模式使用的,此篇配置的是单节点模式,所以在页面的地址栏输入 http://localhost:11000/actuator/hystrix.stream
然后输入熔断器对应的ribbon stream地址 http://localhost:11000/actuator/hystrix.stream:
点击monitor stream按钮:
显示监控仪表盘界面:
注:有可能你进来后页面显示的是 Loading... 状态,这个是因为你的服务没有被消费调用,所以此时没有数据监控,只要调用下被监控的服务,就会出现上图状态了。
在pom.xml中加入:
org.springframework.boot
spring-boot-starter-actuator
在feign启动类加入注解和代码:
package com.springcloudfeign.feign;
import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableCircuitBreaker
@EnableHystrix
public class FeignApplication {
public static void main(String[] args) {
SpringApplication.run(FeignApplication.class, args);
}
@Bean
public ServletRegistrationBean getServlet(){
HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
registrationBean.setLoadOnStartup(1);
registrationBean.addUrlMappings("/actuator/hystrix.stream");
registrationBean.setName("HystrixMetricsStreamServlet");
return registrationBean;
}
}
application.properties文件加上:
management.endpoints.web.exposure.include= '*'
management.endpoint.health.show-details= ALWAYS
这样就可以了,然后先在浏览器中调用这个Feign 中的服务接口:参照之前构建hystrix实现中在浏览器中输入:
http://localhost:10010/getInfoTwo
调用之后,在仪表盘界面中输入需要监控的页面地址:http://localhost:10010/actuator/hystrix.stream:
显示的结果界面:
这样基本的仪表盘监控就实现了。
仪表盘中:实心圆:颜色代表健康度,(绿-黄-红-橙递减);大小代表并发量。
曲线:请求量的变化
以上代码github地址: 源码地址