springcloud系列九 整合Hystrix Dashboard

Hystrix Dashboard是Hystrix的仪表盘组件，主要用来实时监控Hystrix的各项指标信息，通过界面反馈的信息可以快速发现系统中存在的问题。

整合快速体验:

pom.xml(这个是F系之后的依赖)

    <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>

之前的使用:

<dependency>   
 <groupId>org.springframework.cloud</groupId>  
  <artifactId>spring-cloud-starter-hystrix</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-actuator</artifactId>
</dependency>

启动类上加

启动类配置@EnableHystrixDashboard注解

启动类加配置:

package com.cxy;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import com.netflix.loadbalancer.BestAvailableRule;
import com.netflix.loadbalancer.IRule;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

/***
 * @ClassName: PersonApplication
 * @Description:
 * @Auther: 陈绪友
 * @Date: 2019/1/2816:30
 * @version : V1.0
 */
@EnableCircuitBreaker
@SpringBootApplication
@EnableEurekaClient  //开启注解，注册服务
@MapperScan("com.cxy")
@EnableFeignClients
@EnableHystrixDashboard
public class UserApplication {
    public static void main(String[] args) {

        SpringApplication.run(UserApplication.class,args);
    }
   @Bean
   // @LoadBalanced  //使用负载均衡器Ribbon
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }

    /*@Bean
    public IRule myRule(){
        //return new RoundRobinRule();//轮询
        // return new RetryRule();//重试
        return new BestAvailableRule();
    }*/
    @Bean
    public ServletRegistrationBean getServlet(){
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup();
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

http://127.0.0.1:8082/actuator/hystrix.stream  这个路径配置千万不要写localhost

不然控制台报错:

java.net.UnknownHostException: loclahost
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_192]
    at java.net.InetAddress$.lookupAllHostAddr(InetAddress.java:) ~[na:1.8.0_192]
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:) ~[na:1.8.0_192]
    at java.net.InetAddress.getAllByName0(InetAddress.java:) ~[na:1.8.0_192]
    at java.net.InetAddress.getAllByName(InetAddress.java:) ~[na:1.8.0_192]
    at java.net.InetAddress.getAllByName(InetAddress.java:) ~[na:1.8.0_192]
    at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:) ~[httpclient-4.5..jar:4.5.]
    at org.springframework.cloud.netflix.hystrix.dashboard.HystrixDashboardConfiguration$ProxyStreamServlet.doGet(HystrixDashboardConfiguration.java:) ~[spring-cloud-netflix-hystrix-dashboard-2.1..RELEASE.jar:2.1..RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) [tomcat-embed-core-9.0..jar:9.0.]

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