spring cloud 2.x版本 Hystrix Dashboard斷路器教程

時間 2019-11-06

標籤 spring cloud 2.x 版本 hystrix dashboard 斷路器教程欄目 Spring 简体版

原文原文鏈接

前言

本文采用Spring cloud本文爲2.1.8RELEASE，version=Greenwich.SR3 java

本文基於前兩篇文章eureka-server、eureka-client、eureka-ribbon和eureka-feign的實現。參考git

eureka-server

eureka-client

eureka-ribbon

eureka-feign

概念

Hystrix Dashboard時Hystrix提供的一個能夠查看hystrix監控數據的控制面板。Hystrix提供了近實時的數據監控，Hystrix會實時、累加的記錄全部關於HystrixCommand的執行信息，包括每秒執行多少請求，多少成功和多少失敗等。github

建立Hystrix Dashboard工程

1.1 建立sping boot工程：hysteric-dashboard

1.2 添加pom.xml相關依賴

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
</dependency>
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1.3 application添加配置信息

spring:
 application:
 name: hystrix-dashboard
server:
 port: 8500

eureka:
 instance:
 hostname: localhost
 lease-renewal-interval-in-seconds: 5
 lease-expiration-duration-in-seconds: 10
 client:
 service-url:
 defaultZone: http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/
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1.4 啓動類HystrixDashboardApplication增長註解

package spring.cloud.demo.hystrixdashboard;

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

@EnableHystrixDashboard
@EnableDiscoveryClient
@SpringBootApplication
public class HystrixDashboardApplication {

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

}
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@EnableHystrixDashboard：啓動Hystrix Dashboard斷路器看板相關配置web

1.5 啓動hystrix-dashboard服務

打開瀏覽器，輸入http://localhost:8500/hystrix顯示結果以下：spring

url輸入框：表明要監控的服務消費者瀏覽器

Single Hystrix App: https://hystrix-app:port/actuator/hystrix.stream：要監控路徑url格式app

1.6 監控ribbon服務

1.6.1 eureka-ribbon增長Hystrix的Configuration

package spring.cloud.demo.eurekaribbon.config;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/** * @auther: maomao * @DateT: 2019-09-17 */
@Configuration
public class HystrixConfig {

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

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啓動eureka-client和eureka-ribbon服務。而後在hystrix dashboard控制面板url框中輸入：分佈式

點擊Monitor Stream會顯示： spring-boot

Unable to connect to Command Metric Stream問題緣由：由於咱們開啓監控的斷路器流Hystrix Stream路徑http://localhost:8901/hystrix.stream不是spring boot的默認路徑，也不是hystrix的默認路徑，全部要增長Hystrixconfig來制定斷路器的指標流Servlet。post

首次成功啓動頁面也有可能會顯示loading，這表明尚未訪問咱們要監控的服務，這是咱們能夠屢次請求要訪問的服務就能夠看到指標數據

按照一樣的方式我能夠設置eureka-feign的配置來進行監看。