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SpringCloud HystrixDashboard服務(wù)監(jiān)控詳解

更新時間：2022年11月04日 14:03:38 作者：小鐘要學(xué)習(xí)?。?！

Hystrix Dashboard 是Spring Cloud中查看Hystrix實(shí)例執(zhí)行情況的一種儀表盤組件，支持查看單個實(shí)例和查看集群實(shí)例，本文將對其服務(wù)監(jiān)控學(xué)習(xí)

hystrixDashboard服務(wù)監(jiān)控

除了隔離依賴服務(wù)的調(diào)用以外，Hystrix還提供了準(zhǔn)實(shí)時的調(diào)用監(jiān)控（Hystrix Dashboard），Hystrix會持續(xù)地記錄所有通過Hystrix發(fā)起的請求的執(zhí)行信息，并以統(tǒng)計報表和圖形的形式展示給用戶，包括每秒執(zhí)行多少請求多少成功，多少失敗等。Netflix通過hystrix-metrics-event-stream項(xiàng)目實(shí)現(xiàn)了對以上指標(biāo)的監(jiān)控。Spring Cloud也提供了Hystrix Dashboard的整合，對監(jiān)控內(nèi)容轉(zhuǎn)化成可視化界面。

1、新建cloud-consumer-hystrix-dashboard9001儀表盤監(jiān)控模塊

2、修改pom.xml文件引入儀表盤依賴

核心依賴：spring-cloud-starter-netflix-hystrix-dashboard

注意：所有的圖形化展示，都需要引入spring-boot-starter-actuator依賴，在8001、8002上都需要引入

<?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>springcloud2022</artifactId>
        <groupId>com.zcl.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>cloud-consumer-hystrix-dashboard9001</artifactId>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <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>

3、添加YAML配置文件

server:
port: 9001

4、建立啟動類

必須要加上@EnableHystrixDashboard注解激活

package com.zcl.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
/**
 * 描述：儀表盤啟動類
 */
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardMain9001 {
    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardMain9001.class, args);
    }
}

5、啟動項(xiàng)目

啟動項(xiàng)目測試：http://localhost:901/hystrix

使用方法：在下面頁面中輸入需要進(jìn)行監(jiān)控的地址即可

斷路器演示監(jiān)控

監(jiān)控8001注意事項(xiàng)

1、必須要有如下的兩個依賴

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

2、對啟動類的修改

注意:新版本Hystrix需要在主啟動類MainAppHystrix8001中指定監(jiān)控路徑,否則會出現(xiàn)報錯

package com.zcl.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;
/**
 * 描述：熔斷限流啟動類
 */
@SpringBootApplication
@EnableEurekaClient
@EnableCircuitBreaker
public class PaymentHystrixMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentHystrixMain8001.class, args);
    }
    /**
     *此配置是為了服務(wù)監(jiān)控而配置，與服務(wù)容錯本身無關(guān)，springcloud升級后的坑
     *ServletRegistrationBean因?yàn)閟pringboot的默認(rèn)路徑不是"/hystrix.stream"，
     *只要在自己的項(xiàng)目里配置上下面的servlet就可以了
     */
    @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;
    }
}

監(jiān)控測試

啟動7001Eureka服務(wù)中心

觀察監(jiān)控窗口

9001監(jiān)控8001

8001地址測試

先訪問正確地址，再訪問錯誤地址，再正確地址，會發(fā)現(xiàn)圖示斷路器都是慢慢放開的。

http://localhost:8001/payment/circuit/31：正常的訪問

http://localhost:8001/payment/circuit/-31：異常訪問

監(jiān)控狀態(tài)

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