添加依赖

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>org.baozi</groupId>
    <artifactId>cloud-hystrix</artifactId>
    <version>1.0</version>
    <packaging>pom</packaging>

    <modules>
        <module>hystrix-registration</module>
        <module>hystrix-provider</module>
        <module>hystrix-consumer</module>
        <module>hystrix-dashboard</module>
    </modules>


    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
    </properties>


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


    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</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>

</project>

<?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>
   <parent>
      <groupId>org.baozi</groupId>
      <artifactId>cloud-hystrix</artifactId>
      <version>1.0</version>
      <relativePath>..</relativePath>
   </parent>

   <artifactId>hystrix-dashboard</artifactId>


</project>

服务消费者

1. 确保被监控的(这里是前面的服务消费者)添加了@EnableCircuitBreaker或者@EnableHystrix。
2. 修改application.properties，开放actuator。

spring.application.name=hystrix-consumer
server.port=11000

eureka.client.service-url.defaultZone=http://localhost:9000/eureka

management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

Hystrix Dashboard

spring.application.name=hystrix-dashboard
server.port=12000

eureka.client.service-url.defaultZone=http://localhost:9000/eureka

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;

@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardApplication {

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

}

访问：http://localhost:12000/hystrix

hystrix-dashboard
单体监控：输入http://localhost:11000/actuator/hystrix.stream hystrix-dashboard

实心圆：共有两种含义。
1.颜色代表实例的健康度，健康度从绿色、黄色、橙色、红色递减。
2.大小也会根据实例的请求流量发生变化，流量越大该实心圆就越大。