Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

时间:2022-05-05 17:59:50

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

Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

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

Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

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

         <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>

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/> <!-- lookup parent from repository -->
</parent> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties> <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

 package spring.helloworld.turbine.service;

 import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.cloud.netflix.turbine.EnableTurbine; @SpringBootApplication
@EnableHystrixDashboard
@EnableTurbine
public class DashboardApplication { public static void main(String[] args) {
SpringApplication.run(DashboardApplication.class, args);
}
}

3). 在application.yml中配置turbine参数

 eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
server:
port: 8903
spring:
application:
name: hystrix-dashboard-turbine
turbine:
appConfig: service-feign, service-ribbon
aggregator:
clusterConfig: default
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

Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

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

Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

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

Spring Cloud 入门教程(八): 断路器指标数据监控Hystrix Dashboard 和 Turbine

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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