用Hystrix Dashboard和Turbine實現(xiàn)數(shù)據(jù)的可視化監(jiān)控

Hystrix提供了實時監(jiān)控箩溃，可以記錄執(zhí)行信息，QPS拄丰，請求中成功和失敗的數(shù)量等蝇棉。

Hystrix Dashboard的可視化監(jiān)控

單個應用的熔斷監(jiān)控

1. 添加依賴和配置

添加Eureka、Hystrix澜倦、Hystrix-dashboard聚蝶、Actuator、Feign的依賴

 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <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.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

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

2. 添加配置

spring.application.name=spring-cloud-consumer-hystrix
server.port=9001
feign.hystrix.enabled=true
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

3. 添加配置啟動類和Servlet

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableHystrixDashboard
@EnableCircuitBreaker
public class SpringCloudConsumerHystrixApplication {

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

    @Bean
    public ServletRegistrationBean getServlet() {
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

注意： springboot2.0需要配置Servlet才會顯示監(jiān)控數(shù)據(jù)藻治。

4. 查看監(jiān)控數(shù)據(jù)

啟動項目spring-cloud-eureka碘勉、spring-cloud-producer、spring-cloud-consumer三個項目
訪問http://localhost:9001/hystrix
然后輸入http://localhost:9001/actuator/hystrix.stream 即可進入監(jiān)控頁面桩卵。

Hystrix Dashboard + Turbine的可視化監(jiān)控

在分布式系統(tǒng)中验靡，相同服務實例經(jīng)常需要部署上百甚至上千個倍宾，很多時候需要把服務實例的狀態(tài)以集群方式展現(xiàn)出來，這樣就可以更好的查看系統(tǒng)狀態(tài)胜嗓。凿宾，為此Netflix提供了一個開源項目（Turbine）來提供把多個hystrix.stream的內(nèi)容聚合為一個數(shù)據(jù)源供Dashboard展示。

1. 添加依賴并啟動支持

需要添加Turbine兼蕊、Hystrix-dashboard初厚、Actuator、Hystrix依賴

 <!--Turbine-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-turbine</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <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.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

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

2. 添加配置

spring.application.name=hystrix-dashboard-turbine
server.port=8001
turbine.appConfig=node01,node02
turbine.aggregator.clusterConfig= default
turbine.clusterNameExpression= new String("default")
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

turbine.appConfig ：配置Eureka中的serviceId列表孙技，表明監(jiān)控哪些服務
turbine.aggregator.clusterConfig ：指定聚合哪些集群产禾，多個使用”,”分割，默認為default牵啦⊙乔椋可使用http://.../turbine.stream?cluster={clusterConfig之一}訪問
turbine.clusterNameExpression ： 1. clusterNameExpression指定集群名稱，默認表達式appName哈雏；此時：turbine.aggregator.clusterConfig需要配置想要監(jiān)控的應用名稱楞件；2. 當clusterNameExpression: default時，turbine.aggregator.clusterConfig可以不寫裳瘪，因為默認就是default土浸；3. 當clusterNameExpression: metadata[‘cluster’]時，假設想要監(jiān)控的應用配置了eureka.instance.metadata-map.cluster: ABC彭羹，則需要配置黄伊，

3. 配置啟動支持

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

4. 創(chuàng)建多個服務消費者

分別創(chuàng)建子項目spring-cloud-consumer-node1,spring-cloud-consumer-node2
node01添加配置

spring.application.name=node01
server.port=9001
feign.hystrix.enabled=true
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

node02添加配置

spring.application.name=node02
server.port=9002
feign.hystrix.enabled=true
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

分別配置feign
node01

@FeignClient(name = "spring-cloud-provider", fallback = HelloHystrix.class)
public interface MyFeignClient {
    @RequestMapping(value = "/hello")
    public String hello(@RequestParam(value = "name") String name);
}

node02

@FeignClient(name = "spring-cloud-provider2", fallback = HelloHystrix.class)
public interface MyFeignClient {
    @RequestMapping(value = "/hello")
    public String hello2(@RequestParam(value = "name") String name);
}

5. 測試

依次啟動spring-cloud-eureka、spring-cloud-consumer-node1派殷、spring-cloud-consumer-node1还最、hystrix-dashboard-turbine（Turbine）
（1）訪問 http://localhost:8001/turbine.stream
返回：

ping
data: {"reportingHostsLast10Seconds":1,"name":"meta","type":"meta","timestamp":1494921985839}

進行圖形化監(jiān)控查看，輸入：http://localhost:8001/hystrix毡惜，返回酷酷的小熊界面拓轻，輸入： http://localhost:8001/turbine.stream，然后點擊 Monitor Stream ,可以看到出現(xiàn)了倆個監(jiān)控列表

參考：
http://www.ityouknow.com/springcloud/2017/05/18/hystrix-dashboard-turbine.html