Hystrix-Dashboard熔断器的可视化界面

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我是靠谱客的博主碧蓝战斗机，最近开发中收集的这篇文章主要介绍Hystrix-Dashboard熔断器的可视化界面，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

在微服务架构中，为了保证服务实例的可用性，防止服务实例出现故障导致线程阻塞，而出现了熔断器模型，熔断器的状况反应了哟个程序的可用性和健壮性，它是一个重要指标。Hystrix Dashboard是监控Hystrix的熔断器状况的一个组件，提供了数据监控和友好的图形化展示界面。

1.添加Hystrix Dashboard依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</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-hystrix-dashboard</artifactId>
    <version>1.4.6.RELEASE</version>
</dependency>

2.在程序的启动类上加上@EnableHystrixDashboard注解，开启Hystrix Dashboard的功能

@SpringBootApplication
@EnableHystrix
@EnableHystrixDashboard
@EnableEurekaClient
public class EurekaRibbonHystrixApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaRibbonHystrixApplication.class, args);
    }

}

在spring boot 2.X还要加上这段配置

    @Bean
    public ServletRegistrationBean servletRegistrationBean() {
        HystrixMetricsStreamServlet streamServlet =new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean =new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;

    }

3.配置文件

server.port=8770

spring.application.name=eureka-consumer2
#Eureka的注册中心
eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8761/eureka/

启动程序后访问http://127.0.0.1:8770/hystrix.stream,在浏览器上会显示熔断器的数据指标：

data: {"type":"HystrixCommand","name":"command名字","group":"RibbonService","currentTime":1553412299390,"isCircuitBreakerOpen":false,"errorPercentage":0,"errorCount":0,"requestCount":0,"rollingCountBadRequests":0,"rollingCountCollapsedRequests":0,"rollingCountEmit":0,"rollingCountExceptionsThrown":0,"rollingCountFailure":0,"rollingCountFallbackEmit":0,"rollingCountFallbackFailure":0,"rollingCountFallbackMissing":0,"rollingCountFallbackRejection":0,"rollingCountFallbackSuccess":0,"rollingCountResponsesFromCache":0,"rollingCountSemaphoreRejected":0,"rollingCountShortCircuited":0,"rollingCountSuccess":0,"rollingCountThreadPoolRejected":0,"rollingCountTimeout":0,"currentConcurrentExecutionCount":0,"rollingMaxConcurrentExecutionCount":0,"latencyExecute_mean":0,"latencyExecute":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"latencyTotal_mean":0,"latencyTotal":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"propertyValue_circuitBreakerRequestVolumeThreshold":20,"propertyValue_circuitBreakerSleepWindowInMilliseconds":5000,"propertyValue_circuitBreakerErrorThresholdPercentage":50,"propertyValue_circuitBreakerForceOpen":false,"propertyValue_circuitBreakerForceClosed":false,"propertyValue_circuitBreakerEnabled":true,"propertyValue_executionIsolationStrategy":"THREAD","propertyValue_executionIsolationThreadTimeoutInMilliseconds":1000,"propertyValue_executionTimeoutInMilliseconds":1000,"propertyValue_executionIsolationThreadInterruptOnTimeout":true,"propertyValue_executionIsolationThreadPoolKeyOverride":null,"propertyValue_executionIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_fallbackIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_metricsRollingStatisticalWindowInMilliseconds":10000,"propertyValue_requestCacheEnabled":true,"propertyValue_requestLogEnabled":true,"reportingHosts":1,"threadPool":"RibbonService"}

data: {"type":"HystrixThreadPool","name":"RibbonService","currentTime":1553412299390,"currentActiveCount":0,"currentCompletedTaskCount":27,"currentCorePoolSize":10,"currentLargestPoolSize":10,"currentMaximumPoolSize":10,"currentPoolSize":10,"currentQueueSize":0,"currentTaskCount":27,"rollingCountThreadsExecuted":0,"rollingMaxActiveThreads":0,"rollingCountCommandRejections":0,"propertyValue_queueSizeRejectionThreshold":5,"propertyValue_metricsRollingStatisticalWindowInMilliseconds":10000,"reportingHosts":1}

ping: 

data: {"type":"HystrixCommand","name":"command名字","group":"RibbonService","currentTime":1553412299890,"isCircuitBreakerOpen":false,"errorPercentage":0,"errorCount":0,"requestCount":0,"rollingCountBadRequests":0,"rollingCountCollapsedRequests":0,"rollingCountEmit":0,"rollingCountExceptionsThrown":0,"rollingCountFailure":0,"rollingCountFallbackEmit":0,"rollingCountFallbackFailure":0,"rollingCountFallbackMissing":0,"rollingCountFallbackRejection":0,"rollingCountFallbackSuccess":0,"rollingCountResponsesFromCache":0,"rollingCountSemaphoreRejected":0,"rollingCountShortCircuited":0,"rollingCountSuccess":0,"rollingCountThreadPoolRejected":0,"rollingCountTimeout":0,"currentConcurrentExecutionCount":0,"rollingMaxConcurrentExecutionCount":0,"latencyExecute_mean":0,"latencyExecute":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"latencyTotal_mean":0,"latencyTotal":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"propertyValue_circuitBreakerRequestVolumeThreshold":20,"propertyValue_circuitBreakerSleepWindowInMilliseconds":5000,"propertyValue_circuitBreakerErrorThresholdPercentage":50,"propertyValue_circuitBreakerForceOpen":false,"propertyValue_circuitBreakerForceClosed":false,"propertyValue_circuitBreakerEnabled":true,"propertyValue_executionIsolationStrategy":"THREAD","propertyValue_executionIsolationThreadTimeoutInMilliseconds":1000,"propertyValue_executionTimeoutInMilliseconds":1000,"propertyValue_executionIsolationThreadInterruptOnTimeout":true,"propertyValue_executionIsolationThreadPoolKeyOverride":null,"propertyValue_executionIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_fallbackIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_metricsRollingStatisticalWindowInMilliseconds":10000,"propertyValue_requestCacheEnabled":true,"propertyValue_requestLogEnabled":true,"reportingHosts":1,"threadPool":"RibbonService"}

在浏览器上访问http://127.0.0.1:8770/hystrix，浏览器显示的界面如下图所示：