6、Dashboard流监控

1、新建监控模块：springcloud-consumer-hystrix-dashboard

pom依赖：

<dependencies>
        <!--Hystrix依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!--dashboard依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!--Ribbon-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!--Eureka-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>
        <!--我们需要拿到实体类，所以要配置api moudle-->
        <dependency>
            <groupId>com.zhixi</groupId>
            <artifactId>springcloud-01-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

2、编写端口配置

1 2	`server:` `port: 9001`

3、启用Hystrix仪表板（主配置类）

// 启用Hystrix仪表板
@EnableHystrixDashboard
@SpringBootApplication
public class DeptConsumerDashboard_9001 {
    public static void main(String[] args) {
        SpringApplication.run(DeptConsumerDashboard_9001.class, args);
    }
}

开启9001服务可以看到监控页面：

4、往服务里面放入监控实例

在springcloud-provider-dept-8001-hystrix模块的主启动类中添加servlet

@EnableCircuitBreaker
// 启用发现客户端
@EnableDiscoveryClient
// 开启Eureka客户端注解，在服务启动后自动向注册中心注册服务
@EnableEurekaClient
// 启动类
@SpringBootApplication
public class DeptProvider_hystrix_8001 {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider_hystrix_8001.class, args);
    }

    //增加一个 Servlet
    @Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(new HystrixMetricsStreamServlet());
        //访问该页面就是监控页面
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        return registrationBean;
    }
}