【Hystrix斷路器】之Hystrix圖形化Dashboard搭建與實戰

前言：

本篇博客主要是分享Hystrix圖形化Dashboard搭建與監控實戰，通過博客的編寫提高自己的掌握能力也想幫助其他人：

概述

除了隔離依賴服務的調用以外，Hystrix還提供了準實時的調用監控（Hystrix Dashboard），Hystrix會持續地記錄所有通過Hystrix發起的請求的執行信息，並以統計報表和圖形的形式展示給用戶，包括每秒執行多少請求多少成功，多少失敗等，Netflix通過hystrix-metrics-event-stream項目實現了對以上指標的監控。Spring Cloud也提供了Hystrix Dashboard的整合，對監控內容轉化成可視化界面。

儀表盤創建

修改pom

<?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">
    <parent>
        <artifactId>com.zcw.springcloud2020508</artifactId>
        <groupId>com.zcw</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumer-hystrix-dashboard9001</artifactId>

     <dependencies>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-devtools</artifactId>
             <scope>runtime</scope>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>
</project>

創建YML

server:
  port: 9001

修改啓動類

package com.zcw.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;

/**
 * @ClassName : HystrixDashboardApplication9001
 * @Description :
 * @Author : Zhaocunwei
 * @Date: 2020-05-21 13:43
 */
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardApplication9001 {
    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardApplication9001.class,args);
    }
}

注意如果服務需要圖形化被監控，需要添加如下依賴：

搭建成功：

斷路器演示

修改我們服務提供者配置

重點注意的地方:


package com.zcw.springcloud;

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.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;

/**
 * @ClassName : PaymentHystrixApplication
 * @Description :
 * @Author : Zhaocunwei
 * @Date: 2020-05-19 15:45
 */
@SpringBootApplication
@EnableEurekaClient
@EnableCircuitBreaker
public class PaymentHystrixApplication {
    public static void main(String[] args) {
        SpringApplication.run(PaymentHystrixApplication.class,args);
    }

    /**
     * 此配置是爲了服務監控而配置，與服務容錯本身無關，springcloud升級後的坑
     * ServletRegistrationBean因爲springboot 的默認路徑不是"/hystrix.stream"，
     * 只要在自己的項目裏配置上下面的servlet就可以了
     * @return
     */
    @Bean
    public ServletRegistrationBean getServlet(){
        HystrixMetricsStreamServlet hystrixMetricsStreamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(hystrixMetricsStreamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}