Spring Cloud - breaker index data monitoring Hystrix Dashboard and Turbine Spring Cloud Start Tutorial (VIII): circuit breakers index data monitoring Hystrix Dashboard and Turbine

Spring Cloud Start Tutorial (VIII): circuit breakers index data monitoring Hystrix Dashboard and Turbine

1. Hystrix Dashboard (breaker: hystrix dashboard)

Hystrix a very important function is to collect relevant data indicators by HystrixCommand. Hystrix Dashboard can be very efficient real health of each circuit breaker.

1). In the Ribbon services g and Feign services Maven project pom.xml have joined rely

1 <dependency>
2     <groupId>org.springframework.boot</groupId>
3     <artifactId>spring-boot-starter-actuator</artifactId>
4  </dependency>
5 <dependency>
6     <groupId>org.springframework.cloud</groupId>
7     <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
8 </dependency>

spring-boot-starter-actuator used in mobile phones metric, support hystrix.stream. spring-cloud-starter-hystrix-dashboard support dashboard of UI

2) based on the start Spring Boot@EnableHystrixDashboard注解和@EnableCircuitBreaker注解。需要特别注意的是我们之前的Feign服务由于内置断路器支持，所以没有@EnableCircuitBreaker注解，但要使用Dashboard则必须加，如果不加，Dashboard无法接收到来自Feign内部断路器的监控数据，会报“Unable to connect to Command Metric Stream”错误

 1 @SpringBootApplication
 2 @EnableDiscoveryClient
 3 @EnableFeignClients
 4 @EnableCircuitBreaker
 5 @EnableHystrixDashboard
 6 public class ServiceFeignApplication {
 7 
 8     public static void main(String[] args) {
 9         SpringApplication.run(ServiceFeignApplication.class, args);
10     }
11 }

3) Then you can access the /hystrix，这个URL将dashboard point to define /hystrix.stream in Hystrix client application

Entered service in the dashboard URL: Click monitor into the monitoring interface, Ribbon service localhost created before our visit: 8901 / or Feign service localhost: 8902 / can see the dynamic change monitoring UI

2. Turbine monitored using a plurality of streams in the Dashboard

以上例子只能监控一个，要同时监控多个流怎么办？答案是，可以单独做一个Turbine服务，专门监控所有断路器状态，从而掌握整个系统中所有微服务的状态。下面我们就来创建一个Turbine服务，来监控我们之前做的Feign服务和Ribbon服务

1）. 创建一个maven工程，在pox.xml添加以下依赖

 1         <dependency>
 2             <groupId>org.springframework.cloud</groupId>
 3             <artifactId>spring-cloud-starter-turbine</artifactId>
 4         </dependency>
 5         <dependency>
 6             <groupId>org.springframework.cloud</groupId>
 7             <artifactId>spring-cloud-netflix-turbine</artifactId>
 8         </dependency>
 9         <dependency>
10             <groupId>org.springframework.boot</groupId>
11             <artifactId>spring-boot-starter-actuator</artifactId>
12         </dependency>
13         <dependency>
14             <groupId>org.springframework.cloud</groupId>
15             <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
16         </dependency>

整个个pox.xml文件如下：

<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>cm.chry</groupId>
<artifactId>spring.helloworld.turbine.service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring.helloworld.turbine.service</name>
<description>Turbine service demo</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
<relativePath/> 
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-turbine</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-netflix-turbine</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-hystrix-dashboard</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.RC1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>

pom.xml

2）. 创建Turbine Dashboard启动类:

用@EnableHystrixDashboard和@EnableTurbine修饰主类，分别用于支持Hystrix Dashboard和Turbine

 1 package spring.helloworld.turbine.service;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
 6 import org.springframework.cloud.netflix.turbine.EnableTurbine;
 7 
 8 @SpringBootApplication
 9 @EnableHystrixDashboard
10 @EnableTurbine
11 public class DashboardApplication {
12 
13     public static void main(String[] args) {
14         SpringApplication.run(DashboardApplication.class, args);
15     }
16 }

3). 在application.yml中配置turbine参数

 1 eureka:
 2     client:
 3         serviceUrl:
 4             defaultZone: http://localhost:8761/eureka/
 5 server:
 6     port: 8903
 7 spring:
 8     application:
 9         name: hystrix-dashboard-turbine
10 turbine:
11     appConfig: service-feign, service-ribbon
12     aggregator:
13         clusterConfig: default
14     clusterNameExpression: new String("default")

turbine.appConfig定义了要监控的服务，这里是我们在前面章节创建的service-feign和sercice-ribbon; aggregator.clusterConfig定义了聚合方式，此处为default.

turbine.appConfig ：配置Eureka中的serviceId列表，表明监控哪些服务

turbine.aggregator.clusterConfig ：指定聚合哪些集群，多个使用”,”分割，默认为default。可使用http://.../turbine.stream?cluster={clusterConfig之一}访问

turbine.clusterNameExpression ：指定集群名称，可以是三种类型的值

- 默认表达式为appName；此时turbine.aggregator.clusterConfig需要配置想要监控的应用名称；

- 当为default时，turbine.aggregator.clusterConfig可以不写，因为默认就是default；

- 当为metadata[‘cluster’]时，假设想要监控的应用配置了eureka.instance.metadata-map.cluster: ABC，则需要配置，同时turbine.aggregator.clusterConfig: ABC

4）. 依次启动eureka服务， 2个Helloworld服务， Feign服务，ribbon服务和刚创建turbine服务。从eureka服务中我们可以看到

5）通过Turbine服务访问HystrixDashborad， http:localhost:8903/hystrix

监控流的URL填http://localhost:8903/turbine.stream, 点击monitor stream, 进入监控页面，随便刷新下feign和ribbon服务（http://localhost:8902/hello和http://localhost:8901），可以看到监控页面的变化。如下图，两个服务的监控都会显示在dashboard上

1. Hystrix Dashboard (断路器：hystrix 仪表盘)

Hystrix一个很重要的功能是，可以通过HystrixCommand收集相关数据指标. Hystrix Dashboard可以很高效的现实每个断路器的健康状况。

1）. 在Ribbon服务g和Feign服务的Maven工程的pom.xml中都加入依赖

1 <dependency>
2     <groupId>org.springframework.boot</groupId>
3     <artifactId>spring-boot-starter-actuator</artifactId>
4  </dependency>
5 <dependency>
6     <groupId>org.springframework.cloud</groupId>
7     <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
8 </dependency>

spring-boot-starter-actuator用于手机metric，支持hystrix.stream。spring-cloud-starter-hystrix-dashboard支持dashboard的UI

2）在Spring Boot启动类上用@EnableHystrixDashboard注解和@EnableCircuitBreaker注解。需要特别注意的是我们之前的Feign服务由于内置断路器支持，所以没有@EnableCircuitBreaker注解，但要使用Dashboard则必须加，如果不加，Dashboard无法接收到来自Feign内部断路器的监控数据，会报“Unable to connect to Command Metric Stream”错误

 1 @SpringBootApplication
 2 @EnableDiscoveryClient
 3 @EnableFeignClients
 4 @EnableCircuitBreaker
 5 @EnableHystrixDashboard
 6 public class ServiceFeignApplication {
 7 
 8     public static void main(String[] args) {
 9         SpringApplication.run(ServiceFeignApplication.class, args);
10     }
11 }

3）然后就可以访问/hystrix，这个URL将dashboard指向定义在Hystrix客户端应用中的/hystrix.stream

在dashboard中输入服务的URL：点击 monitor后进入监控界面，访问我们之前创建的Ribbon服务localhost:8901/, 或者Feign服务localhost:8902/可以看到监控UI动态变化

2. 利用Turbine在一个Dashboard上监控多个流

1）. 创建一个maven工程，在pox.xml添加以下依赖

 1         <dependency>
 2             <groupId>org.springframework.cloud</groupId>
 3             <artifactId>spring-cloud-starter-turbine</artifactId>
 4         </dependency>
 5         <dependency>
 6             <groupId>org.springframework.cloud</groupId>
 7             <artifactId>spring-cloud-netflix-turbine</artifactId>
 8         </dependency>
 9         <dependency>
10             <groupId>org.springframework.boot</groupId>
11             <artifactId>spring-boot-starter-actuator</artifactId>
12         </dependency>
13         <dependency>
14             <groupId>org.springframework.cloud</groupId>
15             <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
16         </dependency>

整个个pox.xml文件如下：

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

pom.xml

2）. 创建Turbine Dashboard启动类:

用@EnableHystrixDashboard和@EnableTurbine修饰主类，分别用于支持Hystrix Dashboard和Turbine

 1 package spring.helloworld.turbine.service;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
 6 import org.springframework.cloud.netflix.turbine.EnableTurbine;
 7 
 8 @SpringBootApplication
 9 @EnableHystrixDashboard
10 @EnableTurbine
11 public class DashboardApplication {
12 
13     public static void main(String[] args) {
14         SpringApplication.run(DashboardApplication.class, args);
15     }
16 }

3). 在application.yml中配置turbine参数

 1 eureka:
 2     client:
 3         serviceUrl:
 4             defaultZone: http://localhost:8761/eureka/
 5 server:
 6     port: 8903
 7 spring:
 8     application:
 9         name: hystrix-dashboard-turbine
10 turbine:
11     appConfig: service-feign, service-ribbon
12     aggregator:
13         clusterConfig: default
14     clusterNameExpression: new String("default")

turbine.appConfig定义了要监控的服务，这里是我们在前面章节创建的service-feign和sercice-ribbon; aggregator.clusterConfig定义了聚合方式，此处为default.

turbine.appConfig ：配置Eureka中的serviceId列表，表明监控哪些服务

turbine.aggregator.clusterConfig ：指定聚合哪些集群，多个使用”,”分割，默认为default。可使用http://.../turbine.stream?cluster={clusterConfig之一}访问

turbine.clusterNameExpression ：指定集群名称，可以是三种类型的值

- 默认表达式为appName；此时turbine.aggregator.clusterConfig需要配置想要监控的应用名称；

- When is a default, turbine.aggregator.clusterConfigyou can not write, because the default is the default;

- when is metadata [ 'cluster'], assume the application configuration want to monitor eureka.instance.metadata-map.cluster: ABC, configure, andturbine.aggregator.clusterConfig: ABC

4) In turn start eureka service, two Helloworld services, Feign service, ribbon and services just created turbine service. From the eureka service we can see

5) access HystrixDashborad by Turbine Services, http: localhost: 8903 / hystrix

URL monitor the flow of fill http: // localhost: 8903 / turbine.stream, click on the monitor stream, enter the monitoring page, just refresh feign and ribbon Service (http: // localhost: 8902 / hello and http: // localhost: 8901 ), you can see the changes in the monitoring page. Below, two services will be displayed on the dashboard to monitor

Spring Cloud - breaker index data monitoring Hystrix Dashboard and Turbine Spring Cloud Start Tutorial (VIII): circuit breakers index data monitoring Hystrix Dashboard and Turbine

Spring Cloud Start Tutorial (VIII): circuit breakers index data monitoring Hystrix Dashboard and Turbine

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