17：Hystrix Dashboard配置

Hystrix提供了Hystrix Dashboard来实时监控HystrixCommand方法的执行情况。 Hystrix Dashboard可以有效地反映出每个Hystrix实例的运行情况，帮助我们快速发现系统中的问题，从而采取对应措施。

需要创建dashboard监控的服务消费者

添加pom jar依赖

<?xml version="1.0"?>
<project
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.junjay</groupId>
    <artifactId>SpringCloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <groupId>com.junjay</groupId>
  <artifactId>springcloud-consumer-hystrix-dashboard</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>springcloud-consumer-hystrix-dashboard</name>
  <url>http://maven.apache.org</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
    <!-- 消费者只需要实体类+web -->
    <dependency>
      <groupId>com.junjay</groupId>
      <artifactId>springcloud-pai</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>
    <!-- 热部署工具 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
    </dependency>
    <!-- 添加负载均衡Ribbon依赖 -->
    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-ribbon -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-ribbon</artifactId>
      <version>1.4.6.RELEASE</version>
    </dependency>
    <!-- 加入eureka依赖进行服务注册 -->
    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
      <version>1.4.6.RELEASE</version>
    </dependency>
    <!-- 增加hystrix依赖 -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-hystrix</artifactId>
      <version>1.4.6.RELEASE</version>
    </dependency>
    <!-- 增加dashboard依赖 -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
      <version>1.4.6.RELEASE</version>
    </dependency>
  </dependencies>
</project>

配置yml文件

#服务消费者只需要配置启动端口
server:
  port: 9001

编辑主启动类

package org.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
@SpringBootApplication
@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class })
// 开启dashboard
@EnableHystrixDashboard
public class DeptConsumer_9001 {
    public static void main(String[] args) {
        SpringApplication.run(DeptConsumer_9001.class, args);
    }
}

保证服务端都有监控actuator

<!-- actuator 完善监控信息 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

启动服务9001

证明可以访问，启动成功，完整访问（豪猪）

豪猪（学名：Hystrix brachyura hodgsoni）

http://localhost:9001/hystrix

配置监控

在服务端启动类添加监控url
springcloud-provider-dept-8081服务添加

package org.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
// 启动类
@SpringBootApplication
// 开启eureka 在服务启动后自动将服务注册到eureka中
@EnableEurekaClient
// 服务发现及DeptController中的discovery方法
@EnableDiscoveryClient
public class DeptProvider_8081 {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider_8081.class, args);
    }
    // 增加一个servlet
    @Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet() {
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(new HystrixMetricsStreamServlet());
        // Single Hystrix应用程序： http://hystrix-app:port/actuator/hystrix.stream
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        return registrationBean;
    }
}

访问localhost:8081/actuator/hystrix.stream

在dashboard中监控localhost:8081/actuator/hystrix.stream

Dashboard监控一直是Loading ping:一直都是空的

https://blog.csdn.net/qq_38788216/article/details/103929756
错误原因是一直链接不到eureka


需要加在有熔断机制服务中，