SpringCloud Hystrix dashboard2.2.7使用和配置，SpringCloud Hystrix dashboard服务监控

SpringCloud Hystrix dashboard2.2.7使用和配置，SpringCloud Hystrix dashboard服务监控

Unable to connect to Command Metric Stream.解决方案

 

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©Copyright 蕃薯耀 2021-03-15

https://www.cnblogs.com/fanshuyao/

一、SpringCloud Hystrix使用和配置

SpringCloud Hystrix使用和配置，见：

https://www.cnblogs.com/fanshuyao/p/14537475.html

项目：

服务消费者：springCloud-hystrix-web-8655
服务监控：springCloud-hystrix-dashboard-8656

二、SpringCloud Hystrix dashboard使用和配置（服务监控：springCloud-hystrix-dashboard-8656）

1、pom.xml引入依赖
引入：spring-cloud-starter-netflix-hystrix-dashboard、spring-boot-starter-actuator

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
    <version>2.2.7.RELEASE</version>
</dependency>

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

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

2、application.properties配置文件修改

#监控访问地址：http://127.0.0.1:8656/hystrix
#要监控的地址：http://127.0.0.1:8655/actuator/hystrix.stream
server.port=8656

#必须要配置hystrix.dashboard.proxy-stream-allow-list，不然进入监听页面，会报错：Unable to connect to Command Metric Stream.

#控制台输出：ashboardConfiguration$ProxyStreamServlet : Origin parameter: http://127.0.0.1:8655/actuator/hystrix.stream is not in the allowed list of proxy host names.  If it should be allowed add it to hystrix.dashboard.proxyStreamAllowList.

#配置的访问列表的地址，必须一一对应：
#如使用：http://127.0.0.1:8655/actuator/hystrix.stream访问，就配置hystrix.dashboard.proxy-stream-allow-list=127.0.0.1
#如使用：http://localhost:8655/actuator/hystrix.stream访问，就配置hystrix.dashboard.proxy-stream-allow-list=localhost
#不然会出现：Unable to connect to Command Metric Stream.
hystrix.dashboard.proxy-stream-allow-list=127.0.0.1

3、启动类
@EnableHystrixDashboard：启动监控

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

@SpringBootApplication
@EnableHystrixDashboard
public class SpringCloudHystrixDashboard8656Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringCloudHystrixDashboard8656Application.class, args);
    }

}

三、服务消费者：springCloud-hystrix-web-8655，修改监控配置

1、pom.xml引入依赖，actuator不能少

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    <version>2.2.7.RELEASE</version>
</dependency>


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

2、application.properties配置文件修改

#熔断监控暴露的接口，或者使用
#使用*表示全部
#management.endpoints.web.exposure.include=*
management.endpoints.web.exposure.include=hystrix.stream,info,health

3、启动类
加上@EnableHystrix，或者@EnableCircuitBreaker，而@EnableHystrix继承于@EnableCircuitBreaker

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableFeignClients
@EnableEurekaClient
@EnableHystrix
public class SpringCloudHystrixWeb8655Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringCloudHystrixWeb8655Application.class, args);
    }

}

四、启动测试
启动服务消费者和服务监控

1、在浏览器输入地址：

http://127.0.0.1:8656/hystrix

2、在输入框输入监控的地址（服务消费者的监控地址）：

 这里的地址是有/actuator的，有些版本是没有这个的。

http://127.0.0.1:8655/actuator/hystrix.stream

听说这样能把/actuator去掉（未验证）：

#修改base-path，默认是/actuator
#private String basePath = "/actuator";
management.endpoints.web.base-path=/

3、Delay和title自己定义就好

4、点击Monitor Stream按钮进入监控页面，然后调用服务消费者的接口产生服务调用数据

5、当一个服务请求不断发生错误，如10秒中产生20次请求，且请求失败率达到50%以上，此服务就会发生熔断（仅是单个服务，其它服务不影响）

五、注意事项

1、Unable to connect to Command Metric Stream.

问题原因是：

ashboardConfiguration$ProxyStreamServlet : Origin parameter: http://127.0.0.1:8655/actuator/hystrix.stream is not in the allowed list of proxy host names.  If it should be allowed add it to hystrix.dashboard.proxyStreamAllowList.

翻译：ashboardConfiguration $ ProxyStreamServlet：原始参数：http://127.0.0.1:8655/actuator/hystrix.stream不在代理主机名的允许列表中。 如果应允许将其添加到hystrix.dashboard.proxyStreamAllowList。

就是要配置：hystrix.dashboard.proxy-stream-allow-list

解决方法是：

在服务监控：springCloud-hystrix-dashboard-8656项目的application.properties增加：hystrix.dashboard.proxy-stream-allow-list

#配置的访问列表的地址，必须一一对应：
#如使用：http://127.0.0.1:8655/actuator/hystrix.stream访问，就配置hystrix.dashboard.proxy-stream-allow-list=127.0.0.1
#如使用：http://localhost:8655/actuator/hystrix.stream访问，就配置hystrix.dashboard.proxy-stream-allow-list=localhost
#不然会出现：Unable to connect to Command Metric Stream.

hystrix.dashboard.proxy-stream-allow-list=127.0.0.1

（时间宝贵，分享不易，捐赠回馈，^_^）

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©Copyright 蕃薯耀 2021-03-15

https://www.cnblogs.com/fanshuyao/