SpringCloud（八）hystrix Dashboard 单独微服务

末蓝、 2022-05-22 19:57 175阅读 0赞

##### 前言： #####

我们需要监控每一个微服务，但是如果每个微服务都集成hystrix Dashboard，这样设计并不好，所以要把hystrix Dashboard单独分离成一个微服务。

（前几次工程的代码都是基于以前的工程，这次工程完全重写）

##### 代码： #####

首先看一下工程的目录

![70][]

我把springcloud的maven直接放到最外面了，子module直接引用父类的pom

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.xhx.springcloud</groupId>
        <artifactId>springcloud8-hystrix-turbine</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <modules>
            <module>eureka-server</module>
            <module>hystrix-dashboard</module>
            <module>service</module>
            <module>client</module>
        </modules>
        <packaging>pom</packaging>
    
        <name>springcloud8-hystrix-turbine</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.2.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.RC2</spring-cloud.version>
        </properties>
    
        <dependencies>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </repository>
        </repositories>
    
    
    </project>

##### 子module  eureka #####

pom.xml

spring配置文件：

server:
      port: 8761
    eureka:
      instance:
        hostname: localhost
      client:
        fetch-registry: false
        register-with-eureka: false
        service-url:
         defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka

启动类：

package com.xhx.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
    
    /**
     * xuhaixing
     * 2018/6/7 14:22
     */
    @SpringBootApplication
    @EnableEurekaServer
    public class EurekaserverApplication {
        public static void main(String[] args) {
            SpringApplication.run(EurekaserverApplication.class, args);
        }
    }

至此，eureka工程就创建完毕了

##### 子module  微服务的服务端 #####

pom.xml

spring配置文件：

server:
      port: 8083
    spring:
      application:
        name: application-service
    eureka:
      client:
        service-url:
          defaultZone: http://localhost:8761/eureka

controller类，一会用客户端直接调用它

package com.xhx.springcloud.controller;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * xuhaixing
     * 2018/6/7 15:04
     */
    @RestController
    @RequestMapping(value = "hello")
    public class HelloController {
    
        @RequestMapping(value = "getWord")
        public String getWord(@RequestParam(value = "name") String name){
            return name;
        }
    }

启动类：

package com.xhx.springcloud;
    
    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;
    
    /**
     * xuhaixing
     * 2018/6/7 14:56
     */
    @SpringBootApplication
    @EnableEurekaClient
    public class ServiceApplication {
        public static void main(String[] args) {
            SpringApplication.run(ServiceApplication.class,args);
        }
    }

#####     #####

##### 子module 微服务的客户端： #####

pom.xml

openfeign: 新的feign maven依赖包，老的不推荐使用了

actuator: 程序监控与管理

hystrix: 熔断

spring配置文件：

server:
      port: 8085
    spring:
      application:
        name: application-client
    management:
      endpoints:
        web:
          exposure:
            include: "*"
    feign:
      hystrix:
        enabled: true

在springboot2.0以上，management...必须有，否则不会暴露actuator端点

feign.hystrix.enabled为开启feign熔断

feign接口类：

package com.xhx.springcloud.api;
    
    import com.xhx.springcloud.hystrix.HelloHystrix;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    
    /**
     * xuhaixing
     * 2018/6/7 15:28
     */
    @FeignClient(value = "APPLICATION-SERVICE",path = "hello",fallback =HelloHystrix.class)
    public interface HelloApi {
        @RequestMapping(value = "getWord")
        String getWord(@RequestParam(value = "name") String name);
    }

hystrix类：

package com.xhx.springcloud.hystrix;
    
    import com.xhx.springcloud.api.HelloApi;
    import org.springframework.stereotype.Component;
    
    /**
     * xuhaixing
     * 2018/6/7 15:37
     */
    @Component
    public class HelloHystrix implements HelloApi {
        @Override
        public String getWord(String name) {
            return "调用第三方api错误";
        }
    }

controller类：

package com.xhx.springcloud.controller;
    
    import com.netflix.discovery.converters.Auto;
    import com.xhx.springcloud.api.HelloApi;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * xuhaixing
     * 2018/6/7 15:44
     */
    @RestController
    @RequestMapping(value = "userInfo")
    public class UserController {
    
        @Autowired
        private HelloApi helloApi;
    
        @RequestMapping(value = "getName",method = RequestMethod.POST)
        public String getName(@RequestParam(value = "name") String name){
            return helloApi.getWord(name);
        }
    }

启动类：

package com.xhx.springcloud;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
    import org.springframework.cloud.netflix.hystrix.EnableHystrix;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    /**
     * xuhaixing
     * 2018/6/7 15:13
     */
    @SpringBootApplication
    @EnableCircuitBreaker
    @EnableFeignClients
    public class ClientApplication {
        public static void main(String[] args) {
            SpringApplication.run(ClientApplication.class,args);
        }
    }

@EnableCircuitBreaker 为启用熔断，给hystrix dashboard用

@EnableFeignClients 为启用feign客户端

启动这三个工程：

![70 1][]

下面创建hystrix dashboard

pom.xml

启动类：

package com.xhx.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
    
    /**
     * xuhaixing
     * 2018/6/7 14:22
     */
    @SpringBootApplication
    @EnableHystrixDashboard
    public class HystrixdashboardApplication {
        public static void main(String[] args) {
            SpringApplication.run(HystrixdashboardApplication.class, args);
        }
    }

spring配置文件：

server:
      port: 8081
    spring:
      application:
        name: hystrix-dashboard

启动，然后访问：http://localhost:8081/hystrix

![70 2][]

然后点击monitor Stream

首先要访问一次接口，否则 直接访问http://localhost:8085/actuator/hystrix.stream  会一直ping ping ping...

进去后是这样的：

![70 3][]

在监控的界面有两个重要的图形信息：一个实心圆和一条曲线。

**　▪实心圆：**1、通过颜色的变化代表了实例的健康程度，健康程度从绿色、黄色、橙色、红色递减。2、通过大小表示请求流量发生变化，流量越大该实心圆就越大。所以可以在大量的实例中快速发现故障实例和高压实例。

**　▪曲线：**用来记录2分钟内流浪的相对变化，可以通过它来观察流量的上升和下降趋势。

下面这张图是引用的别人的：

![70 4][]

将在下节引用turbine,继续用此工程。

[我的github地址][github]

参考：

[Hystrix-Dashboard仪表盘][Hystrix-Dashboard]

[Spring Cloud中Hystrix仪表盘与Turbine集群监控][Spring Cloud_Hystrix_Turbine]

[70]: /images/20220523/485487f5872a4f94974ad8e15c44c1dd.png
[70 1]: /images/20220523/d9e4693545b649ef99ed8cef5ddbee4e.png
[70 2]: /images/20220523/4190d2d26ad647e59daf44c51d668883.png
[70 3]: /images/20220523/9cacdfde69e640e9ae4f28bb2cc4e8e1.png
[70 4]: /images/20220523/575bde05a6cc447e845022224843ac70.png
[github]: https://github.com/xuhaixing/myDocument.git
[Hystrix-Dashboard]: https://www.cnblogs.com/happyflyingpig/p/8372485.html
[Spring Cloud_Hystrix_Turbine]: https://segmentfault.com/a/1190000011478978