13、如何使用断路器监控Hystrix Dashboard

在微服务架构中如何去监控服务的状态是否正常，非常重要。为例保证微服务的可用性，防止程序断路器模型。运维人员需要一个友好的程序来监控微服务的状态， Hystrix Dashboard作为断路器监控的一个重要组件，提供了数据监控及非常友好的图形化界面，方便运维人员对服务进行监控；，通过界面反馈的信息可以快速发现系统中存在的问题。另外Hystrix Dashboard是一个独立的服务结点，不需要配置任何的注册中心。

1、 新建项目sc-hystrix-dashboard，对用的pom.xml文件如下

 

<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">

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>spring-cloud</groupId>

  <artifactId>sc-hystrix-dashboard</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>sc-hystrix-dashboard</name>

  <url>http://maven.apache.org</url>

 

  <parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>2.0.4.RELEASE</version>

</parent>

 

<dependencyManagement>

<dependencies>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-dependencies</artifactId>

<version>Finchley.RELEASE</version>

<type>pom</type>

<scope>import</scope>

</dependency>

 

</dependencies>

</dependencyManagement>

 

<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

</properties>

 

  <dependencies>

 

<!-- <dependency>

    <groupId>org.springframework.cloud</groupId>

    <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>

    <version>1.4.5.RELEASE</version>

</dependency> -->

 

 

<dependency>

    <groupId>org.springframework.cloud</groupId>

    <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>

</dependency>

 

 

<!-- <dependency>

    <groupId>org.springframework.cloud</groupId>

    <artifactId>spring-cloud-starter-hystrix</artifactId>

    <version>1.4.5.RELEASE</version>

</dependency> -->

 

<dependency>

    <groupId>org.springframework.cloud</groupId>

    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>

</dependency>

 

 

<dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-actuator</artifactId>

</dependency>

 

 

  </dependencies>

</project>

 

 

说明：spring cloud 2.x之后spring-cloud-starter-hystrix-dashboard和spring-cloud-starter-hystrix都标志为过期，具体推荐使用两个依赖请看下面的图片

 

 

 

2、 新建spring boot启动类DashboardApplication.java

package sc.hystrix.dashboard;

 

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;

 

@SpringBootApplication

@EnableHystrixDashboard

public class DashboardApplication {

 

public static void main(String[] args) {

SpringApplication.run(DashboardApplication.class, args);

}

 

}

只需添加注解EnableHystrixDashboard，启动Hystrix Dashboard即可

3、 配置Hystrix Dashboard对应的Servlet

 

package sc.hystrix.dashboard;

 

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

 

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;

 

@Configuration

public class DashboardServletConfig {

 

@Bean

public ServletRegistrationBean getDashboardServlet(){

 

HystrixMetricsStreamServlet servlet = new HystrixMetricsStreamServlet();

ServletRegistrationBean bean = new ServletRegistrationBean(servlet);

bean.setLoadOnStartup(1);

bean.addUrlMappings("/hystrix.stream");

bean.setName("hystrix");

return bean;

}

 

}

 

 

4、 新建配置文件bootstrap.yml

spring:

  application:

    name: sc-hystrix-dashboard

    

server:

  port: 2001

 

5、 启动并验证是否启动成功

方法一：查看日志配置的端口2001，在日志中标志启动成功

 

方法二：从上图标志的1中可以知道可以方法地址：http://127.0.0.1:2001/hystrix

 

 

6、 分析一下下图中的英文

 

大概的意思是：如果查看默认集群使用第一个url，查看指定集群使用第二个url，单个应用监控使用最后一个

7、 在url中输入http://127.0.0.1:2001/hystrix.stream

 

然后点击Monitor Stream按钮

 

或者访问http://localhost:2001/hystrix.stream也会不断的显示ping