SpringCloud（八）hystrix Dashboard 单独微服务

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

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/> <!-- lookup parent from repository -->
    </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

<?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">
    <parent>
        <artifactId>springcloud8-hystrix-turbine</artifactId>
        <groupId>com.xhx.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>eureka-server</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
    </dependencies>

</project>

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

<?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">
    <parent>
        <artifactId>springcloud8-hystrix-turbine</artifactId>
        <groupId>com.xhx.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>service</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

    </dependencies>

</project>

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

<?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">
    <parent>
        <artifactId>springcloud8-hystrix-turbine</artifactId>
        <groupId>com.xhx.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>client</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>

</project>

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：

下面创建hystrix dashboard

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">
    <parent>
        <artifactId>springcloud8-hystrix-turbine</artifactId>
        <groupId>com.xhx.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>hystrix-dashboard</artifactId>

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

    </dependencies>

</project>

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

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：

 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：

将在下节引用turbine,继续用此工程。

我的github地址

参考：

Hystrix-Dashboard仪表盘

Spring Cloud中Hystrix仪表盘与Turbine集群监控