springcloud學習-13 服務監控hystrixDashboard【周陽springcloud2020學習筆記】

Hystrix-dashboard是一款針對Hystrix進行實時監控的可視化圖形工具。
通過Hystrix Dashboard我們可以在直觀地看到各Hystrix Command的請求響應時間, 請求成功率等數據。

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1.新建 hystrix-dashboard-consumer9001
2.pom.xml

    <?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>demo2020</artifactId>
            <groupId>cn.chen.demo</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>

        <artifactId>hystrix-dashboard-consumer9001</artifactId>

        <dependencies>
            <!--新增hystrix dashboard-->
            <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.yml

    server:
      port: 9001

4.主啓動類：添加註解 @EnableHystrixDashboard 開啓熔斷監控支持

    @SpringBootApplication
    @EnableHystrixDashboard
    public class HystrixDashboard9001 {
    	public static void main(String[] args) {
    		SpringApplication.run(HystrixDashboard9001.class,args);
    	}
    }

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所有Provider微服務提供類（8001/8002/8003）都需要監控依賴配置

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

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啓動cloud-consumer-hystrix-dashboard9001該微服務後續將監控微服務8001
http://localhost:9001/hystrix

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修改cloud-provider-hystrix-payment8001
注意：新版本Hystrix需要在主啓動類MainAppHystrix8001中指定監控路徑

    @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;
    }

沒添加會出現 Unable to connect to Command Metric Stream 404

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監控測試
1.啓動eureka
2.觀察監控窗口
9001監控8001：填寫監控地址，http://localhost:8001/hystrix.stream
測試：http://localhost:8001/payment/circuit/31
http://localhost:8001/payment/circuit/-31

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