SpringCloud Hystrix Dashboard断路器监控详解

Hystrix Dashboard简介

在微服务架构中为例保证程序的可用性，防止程序出错导致网络阻塞，出现了断路器模型。断路器的状况反应了一个程序的可用性和健壮性，它是一个重要指标。Hystrix Dashboard是作为断路器状态的一个组件，提供了数据监控和友好的图形化界面。

构建Dashboard断路器监控

1）新建项目，引入依赖

	<dependencies>
        <!-- 引入公用实体类依赖,引入api -->
        <dependency>
            <groupId>com.sc</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- spring boot web启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- Eureka依赖 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!-- Ribbon依赖 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

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

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

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

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

必要的依赖

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

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

        <!-- 监控信息 -->
        <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）配置启动类

@SpringBootApplication
@EnableHystrixDashboard //开启Dashboard监控
public class HystrixDashboardApplication {

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

}

== 至此Dashboard项目搭建完成，可以看出，只需要简单的配置即可，不需要任何的开发==
开打地址：http://loacalhost:9001/hystrix看到一头豪猪图片，说明配置成功

4）配置服务提供者环境

• 添加依赖

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

• 注册ServletRegistrationBean

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

== 这里需要给dashboard监控的服务发送一个请求，该请求是所监控的服务的开启了熔断的端点，也就是该请求里面有调用加了@HystrixCommand注解的方法，然后就可以看到数据了 ==

== 完成对单一服务的断路器监控 ==