正常状态是UP,跳闸是⼀种状态CIRCUIT_OPEN,可以通过/health查看,前提是工程中需要引入SpringBoot的actuator(健康监控),它提供了很多监控所需的接口,可以对应用系统进行配置查看、相关功能统计等。
已经统一添加在父工程中
- <dependency>
- <groupId>org.springframework.bootgroupId>
- <artifactId>spring-boot-starter-actuatorartifactId>
- dependency>
如果我们想看到Hystrix相关数据,比如有多少请求、多少成功、多少失败、多少降级等,那么引入SpringBoot健康监控之后,访问/actuator/hystrix.stream接口可以获取到监控的文字信息,但是不直观,所以Hystrix官方还提供了基于图形化的DashBoard(仪表板)监控平 台。Hystrix仪表板可以显示每个断路器(被@HystrixCommand注解的方法)的状态。
- "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>lagou-parentartifactId>
- <groupId>com.lagougroupId>
- <version>1.0-SNAPSHOTversion>
- parent>
- <modelVersion>4.0.0modelVersion>
-
- <artifactId>lagou-cloud-hystrix-dashboard-9000artifactId>
- <dependencies>
- <dependency>
- <groupId>org.springframework.cloudgroupId>
- <artifactId>spring-cloud-starter-netflix-hystrixartifactId>
- dependency>
-
- <dependency>
- <groupId>org.springframework.cloudgroupId>
- <artifactId>spring-cloud-starter-netflix-hystrix-dashboardartifactId>
- dependency>
- <dependency>
- <groupId>org.springframework.cloudgroupId>
- <artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
- dependency>
- dependencies>
-
-
- <properties>
- <maven.compiler.source>11maven.compiler.source>
- <maven.compiler.target>11maven.compiler.target>
- properties>
-
- project>
- package com.lagou.edu;
-
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
-
- @SpringBootApplication
- @EnableHystrixDashboard // 开启hystrix dashboard
- public class HystrixDashboardApplication9000 {
- public static void main(String[] args) {
- SpringApplication.run(HystrixDashboardApplication9000.class, args);
- }
- }
- server:
- port: 9000
- Spring:
- application:
- name: lagou-cloud-hystrix-dashboard
- eureka:
- client:
- serviceUrl: # eureka server的路径
- defaultZone: http://LagouCloudEurekaServerB:8762/eureka,http://LagouCloudEurekaServerA:8761/eureka #把 eureka 集群中的所有 url 都填写了进来,也可以只写⼀台,因为各个 eureka server 可以同步注册表
- instance:
- #使⽤ip注册,否则会使⽤主机名注册了(此处考虑到对⽼版本的兼容,新版本经过实验都是ip)
- prefer-ip-address: true
- #⾃定义实例显示格式,加上版本号,便于多版本管理,注意是ip-address,早期版本是ipAddress
- instance-id: ${spring.cloud.client.ipaddress}:${spring.application.name}:${server.port}:@project.version@
- package com.lagou.edu;
-
- 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.SpringCloudApplication;
- 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 // 打开Hystrix功能
- @EnableCircuitBreaker // 开启熔断器功能(这个与@EnableHystrix的功能相同,只不过它是通用注解)
- // @SpringCloudApplication // 综合性注解 @SpringCloudApplication = @SpringBootApplication + @EnableDiscoveryClient + @EnableCircuitBreaker
- public class AutoDeliverApplication {
- public static void main(String[] args) {
- SpringApplication.run(AutoDeliverApplication.class, args);
-
- }
-
- // 使用RestTemplate模板对象远程调用
- @Bean
- @LoadBalanced
- public RestTemplate gerRestTemplate() {
- return new RestTemplate();
- }
-
- /**
- * 给被监控微服务中注册一个servlet,后期我们就是通过访问这个servlet来获取服务的Hystrix监控数据的
- * 前提:被监控的微服务,需要引入SpringBoot Actuator的功能
- * @return
- */
- @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;
- }
- }
被监控微服务发布之后,可以直接访问监控servlet,但是得到的数据并不直观,后期可以结合仪表盘更友好的展示
输入监控的微服务端点地址,展示监控的详细数据,比如监控服务消费者http://localhost:8090/actuator/hystrix.stream
实心圆:
曲线波动图: 记录了2分钟内该方法上流量的变化波动图,判断流量上升或者下降的趋势