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

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:

 1 <?xml version="1.0" encoding="UTF-8"?> 
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"  
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
 5     <modelVersion>4.0.0</modelVersion> 
 6     <groupId>cm.chry</groupId> 
 7     <artifactId>spring.helloworld.turbine.service</artifactId> 
 8     <version>0.0.1-SNAPSHOT</version> 
 9     <name>spring.helloworld.turbine.service</name> 
10     <description>Turbine service demo</description> 
11     <parent> 
12         <groupId>org.springframework.boot</groupId> 
13         <artifactId>spring-boot-starter-parent</artifactId> 
14         <version>1.5.3.RELEASE</version> 
15         <relativePath/> <!-- lookup parent from repository --> 
16     </parent> 
17  
18     <properties> 
19         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
20         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
21         <java.version>1.8</java.version> 
22     </properties> 
23  
24     <dependencies> 
25         <dependency> 
26             <groupId>org.springframework.cloud</groupId> 
27             <artifactId>spring-cloud-starter-eureka</artifactId> 
28         </dependency> 
29         <dependency> 
30             <groupId>org.springframework.boot</groupId> 
31             <artifactId>spring-boot-starter-web</artifactId> 
32         </dependency> 
33         <dependency> 
34             <groupId>org.springframework.cloud</groupId> 
35             <artifactId>spring-cloud-starter-turbine</artifactId> 
36         </dependency> 
37         <dependency> 
38             <groupId>org.springframework.cloud</groupId> 
39             <artifactId>spring-cloud-netflix-turbine</artifactId> 
40         </dependency> 
41         <dependency> 
42             <groupId>org.springframework.boot</groupId> 
43             <artifactId>spring-boot-starter-actuator</artifactId> 
44         </dependency> 
45         <dependency> 
46             <groupId>org.springframework.cloud</groupId> 
47             <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId> 
48         </dependency> 
49         <dependency> 
50             <groupId>org.springframework.boot</groupId> 
51             <artifactId>spring-boot-starter-test</artifactId> 
52             <scope>test</scope> 
53         </dependency> 
54     </dependencies> 
55  
56     <dependencyManagement> 
57         <dependencies> 
58             <dependency> 
59                 <groupId>org.springframework.cloud</groupId> 
60                 <artifactId>spring-cloud-dependencies</artifactId> 
61                 <version>Dalston.RC1</version> 
62                 <type>pom</type> 
63                 <scope>import</scope> 
64             </dependency> 
65         </dependencies> 
66     </dependencyManagement> 
67  
68     <build> 
69         <plugins> 
70             <plugin> 
71                 <groupId>org.springframework.boot</groupId> 
72                 <artifactId>spring-boot-maven-plugin</artifactId> 
73             </plugin> 
74         </plugins> 
75     </build> 
76  
77     <repositories> 
78         <repository> 
79             <id>spring-milestones</id> 
80             <name>Spring Milestones</name> 
81             <url>https://repo.spring.io/milestone</url> 
82             <snapshots> 
83                 <enabled>false</enabled> 
84             </snapshots> 
85         </repository> 
86     </repositories> 
87 </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

 

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参考: http://projects.spring.io/spring-cloud/spring-cloud.html#_circuit_breaker_hystrix_dashboard

           http://blog.csdn.net/ityouknow/article/details/72625646

 

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