SpringCloud Hystrix Dashboard斷路器監控詳解

Hystrix Dashboard簡介

在微服務架構中爲例保證程序的可用性，防止程序出錯導致網絡阻塞，出現了斷路器模型。斷路器的狀況反應了一個程序的可用性和健壯性，它是一個重要指標。Hystrix Dashboard是作爲斷路器狀態的一個組件，提供了數據監控和友好的圖形化界面。

構建Dashboard斷路器監控

1）新建項目，引入依賴

	<dependencies>
        <!-- 引入公用實體類依賴,引入api -->
        <dependency>
            <groupId>com.sc</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- spring boot web啓動器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- Eureka依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!-- Ribbon依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

        <!-- Hystrix依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

        <!-- Hystrix Dashboard依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

        <!-- 監控信息 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- 熱部署依賴 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

必要的依賴

		<!-- Hystrix依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

        <!-- Hystrix Dashboard依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

        <!-- 監控信息 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

2. 修改配置文件

server:
  port: 9001

management:
  endpoints:
    web:
      exposure:
        include: health,info,env,metrics

3）配置啓動類

@SpringBootApplication
@EnableHystrixDashboard //開啓Dashboard監控
public class HystrixDashboardApplication {

    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardApplication.class,args);
    }

}

== 至此Dashboard項目搭建完成，可以看出，只需要簡單的配置即可，不需要任何的開發==
開打地址：http://loacalhost:9001/hystrix看到一頭豪豬圖片，說明配置成功

4）配置服務提供者環境

• 添加依賴

		<!-- Hystrix依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!-- 監控信息 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

• 註冊ServletRegistrationBean

@Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(new HystrixMetricsStreamServlet());
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        return registrationBean;
    }

== 這裏需要給dashboard監控的服務發送一個請求，該請求是所監控的服務的開啓了熔斷的端點，也就是該請求裏面有調用加了@HystrixCommand註解的方法，然後就可以看到數據了 ==

== 完成對單一服務的斷路器監控 ==