spring cloud 断路器监控-Hystrix Dashboard

Hystrix Dashboard是作为断路器状态的一个组件，提供了数据监控和友好的图表化界面。

修改service-hi

1、在pom工程文件引入相应的依赖

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

2、在程序的入口ServiceHiApplication类，加上@EnableHystrix注解开启断路器，这个必须的，并且需要在程序中声明断点HystrixCommand，加上@EnableHystrixDashboard注解，开启HystrixDashboard。

@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
@RestController
@EnableHystrix
@EnableHystrixDashboard
@EnableCircuitBreaker
public class ServiceHiApplication {

    /**
     * 访问地址 http://localhost:8762/actuator/hystrix.stream
     * @param args
     */

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

    @Value("${server.port}")
    String port;

    @RequestMapping("/hi")
    @HystrixCommand(fallbackMethod = "hiError")
    public String home(@RequestParam(value = "name", defaultValue = "forezp") String name) {
        return "hi " + name + " ,i am from port:" + port;
    }

    public String hiError(String name) {
        return "hi,"+name+",sorry,error!";
    }

}

4、application.yml

server:
  port: 8762
  application:
    name: service-hi

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
management:
  endpoints:
    web:
      exposure:
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

4、运行程序，依次开启eureka-server和service-hi

5、打开http://localhost:8762/actuator/hystrix.stream，可以看到一些具体的数据。

6、打开localhost:8762/hystrix，可以看见下界面。在界面依次输入http://localhost:8762/actuator/hystrix.stream、2000、miya点击确定。

7、在另一个窗口输入http://localhost:8762/hi?name=xxx，重新刷新hystrix.stream网页。