《SpringCloud专题19》-服务监控hystrixDashboard

1.概述

2.仪表盘9001

新建cloud-consumer-hystrix-dashboard9001

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>springcloud2020</artifactId>
        <groupId>com.itxiongmao.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <dependencies>

        <!--hystrix dashboard-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>

        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!--热部署-->
        <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>

YML

server:
  port: 9001

HystrixDashboardMain9001+新注解@EnableHystrixDashboard

package com.itxiongmao;

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.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
@EnableHystrixDashboard
public class DashboardMain9001 {
    public static void main(String[] args) {
        SpringApplication.run(DashboardMain9001.class,args);
    }
}

所有Provider微服务提供类(8001/8002/8003)都需要监控依赖部署

启动cloud-consumer-hystrix-dashboard9001该微服务后续将监控微服务8001
​​​ http://localhost:9001/hystrix​​

3.断路器演示(服务监控hystrixDashboard)

修改cloud-provider-hystrix-payment8001
注意:新版本Hystrix需要在主启动MainAppHystrix8001中指定监控路径

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.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.context.annotation.Bean;

/**
 * @author zzyy
 * @create 2020/3/7 17:27
 **/
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardMain9001 {
    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardMain9001.class);
    }

    /**
     * 此配置是为了服务监控而配置，与服务容错本身无观，springCloud 升级之后的坑
     * ServletRegistrationBean因为springboot的默认路径不是/hystrix.stream
     * 只要在自己的项目中配置上下面的servlet即可
     * @return
     */
    @Bean
    public ServletRegistrationBean getServlet(){
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean<HystrixMetricsStreamServlet> registrationBean = new ServletRegistrationBean<>(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

Unable to connect to Command Metric Stream. 404

监控测试:
启动一个eureka或者3个eureka集群均可
观察监控窗口
9001监控8001

填写监控地址

http://localhost:8001/hystrix.stream

测试地址

http://localhost:8001/payment/circuit/31
http://localhost:8001/payment/circuit/-31

上述测试通过
先访问正确地址,再访问错误地址,再正确地址,会发现图标断路器都是慢慢放开的.
监控结果,成功

监控结果,失败

4.如何看?

7色

1圈

1线

整图说明

整图说明2

搞懂一个才能看懂复杂的