springcloud-Dashboard 流量監控 (九）

本文轉載自查看原文 2021-05-24 17:54 250 springCloud

新建springcloud-consumer-dashboard-82模塊

pom.xml

關鍵依賴

<dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
     <version>1.4.6.RELEASE</version>
 </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</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>

其它依賴

<!--Feign的依賴-->
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-feign</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-ribbon</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>com.dong</groupId>
      <artifactId>springcloud-common</artifactId>
      <version>1.0-SNAPSHOT</version>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <!--熱部署工具-->
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
  </dependency>

application.yml

server:
  port: 82

主啟動類 @EnableHystrixDashboard開啟流量監控

package com.dong.consumer3;

@SpringBootApplication
@EnableHystrixDashboard
public class ConsumerThreeApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConsumerThreeApplication.class, args);
    }
}

到此dashboard流量監控模塊就搭建完畢了。（可以認為它是一個工具，用來監控某個模塊的訪問量）

springcloud-provider-8001 配置流量監控

添加依賴

<dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-hystrix</artifactId>
      <version>1.4.6.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
  </dependency>

主啟動類關鍵注解@EnableDiscoveryClient

注意：起初沒有使用@EnableCircuitBreaker注解，訪問http://localhost:8001/actuator/hystrix.stream 一直z在ping。並且流量監控頁面也是一直loading。最后發現需要加上@EnableCircuitBreaker 添加熔斷的支持。

package com.dong.provider;

@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
@EnableCircuitBreaker
public class ProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }

    @Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(new HystrixMetricsStreamServlet());
        //訪問該頁面就是監控頁面
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

controller 訪問的接口上加一個@HystrixCommand注解，可以不寫相關熔斷的方法。監控頁面就可以監控到了。（此注解的詳細用戶見服務熔斷）

    @GetMapping("/dept/get/{id}")
    @HystrixCommand
    public Dept getDept(@PathVariable("id") Long id) {
        Dept dept = deptService.queryById(id);
        if (dept == null) {
            throw new RuntimeException("Fail");
        }
        return dept;
    }