1三、如何使用斷路器監控Hystrix Dashboard

公衆號: java樂園java

在微服務架構中如何去監控服務的狀態是否正常,很是重要。爲例保證微服務的可用性,防止程序斷路器模型。運維人員須要一個友好的程序來監控微服務的狀態, Hystrix Dashboard做爲斷路器監控的一個重要組件,提供了數據監控及很是友好的圖形化界面,方便運維人員對服務進行監控;,經過界面反饋的信息能夠快速發現系統中存在的問題。另外Hystrix Dashboard是一個獨立的服務結點,不須要配置任何的註冊中心。web

一、 新建項目sc-hystrix-dashboard,對用的pom.xml文件以下spring

<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>

說明:spring cloud 2.x以後spring-cloud-starter-hystrix-dashboard和spring-cloud-starter-hystrix都標誌爲過時,具體推薦使用兩個依賴請看下面的圖片apache

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二、 新建spring boot啓動類DashboardApplication.javabootstrap

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);
    }

}

只需添加註解EnableHystrixDashboard,啓動Hystrix Dashboard便可架構

三、 配置Hystrix Dashboard對應的Servletapp

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;
    }

}

四、 新建配置文件bootstrap.yml運維

spring:
  application:
    name: sc-hystrix-dashboard
    
server:
  port: 2001

五、 啓動並驗證是否啓動成功
方法一:查看日誌配置的端口2001,在日誌中標誌啓動成功maven

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方法二:從上圖標誌的1中能夠知道能夠方法地址:http://127.0.0.1:2001/hystrixspring-boot

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六、 分析一下下圖中的英文

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大概的意思是:若是查看默認集羣使用第一個url,查看指定集羣使用第二個url,單個應用監控使用最後一個

七、 在url中輸入http://127.0.0.1:2001/hystrix.stream

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而後點擊Monitor Stream按鈕

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或者訪問http://localhost:2001/hystrix.stream也會不斷的顯示ping

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