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README
Apache-2.0

项目wiki文档 https://gitee.com/zhoubang85/sea-springcloud/wikis/pages

springcloud全家桶

项目中使用的技术如下:

  • Eureka注册中心 (支持集群部署)
  • Config注册中心 (支持集群部署)
  • Zuul 服务网关 (支持集群部署)
  • Hystrix 断路器
  • Ribbon 负载均衡
  • Feign 负载均衡
  • Turbine 聚合监控
  • Bus 消息总线

服务与应用

  • user服务提供者 (支持集群部署)
  • shop服务消费者 (支持集群部署)

项目启动

1、前期准备
  • 首先在本地电脑的host文件中,配置好虚拟域名;

虚拟域名需要与sea-server-eureka、sea-service-user、sea-web-shop中application.yml中配置的eureka.client.service-url.defaultZone的域名一致;

我本地host文件中的配置如下(注意中间空格):

127.0.0.1 server.eureka.slave1.com server.eureka.slave2.com
  • 安装rabbitmq
rabbitmq目前只用在配置中心,实现动态刷新spring bean,建议安装。
2、开发环境(以下是我本机环境)
  • jdk1.8
  • idea 2017.3
3、服务启动

1、启动eureka注册中心 - 运行\sea-server-eureka\src\main\java\pers\zb\server\eureka\EurekaServer.java 中的main方法

(建议运行至少2个eureka服务器节点,方可看到高可用集群效果)

2、启动config配置中心 - 运行\sea-server-config\src\main\java\pers\zb\server\config\ConfigApplication.java 中的main方法

(建议运行至少2个config配置中心节点,方可看到高可用集群效果)

3、启动zuul服务网关 - 运行\sea-service-zuul\src\main\java\pers\zb\service\zuul\ZuulApplication.java 中的main方法

(建议运行至少2个zuul服务网关节点,方可看到高可用集群效果)

4、启动hystrix dashboard仪表盘服务 - 运行\sea-web-hystrix-dashboard\src\main\java\pers\zb\web\hystrix\dashboard\HystrixDashboardApplication.java 中的main方法


5、启动user服务 - 运行\sea-service-user\src\main\java\pers\zb\service\user\UserServiceApplication.java 中的main方法

(建议运行至少2个user服务节点,方可看到高可用集群效果)

6、启动shop应用 - 运行\sea-web-shop\src\main\java\pers\zb\web\shop\ShopApplication.java 中的main方法

(建议运行至少2个shop应用节点,方可看到高可用集群效果)

打开eureka控制台,查看各服务的集群信息

  • 根据在\sea-server-eureka\src\main\resources\application.yml中配置的eureka服务器的地址,在浏览器中输入:
    http://127.0.0.1:18761 或者 http://127.0.0.1:28761 即可进入eureka控制台(其中,18761和28761代表不同的eureka服务器的端口号)

  • eureka控制台截图 springcloud eureka控制台

访问项目,查看效果

  • 直接访问shop应用

http://127.0.0.1:(shop应用的端口号)/router

查看user服务的调用效果:观察浏览器的输出内容,通过 msg 的值可以看到其中的端口号发生了变化,也就说明调用了不同的user服务节点,实现了负载均衡。具体代码请查看 \sea-web-shop\src\main\java\pers\zb\web\shop\service\UserServiceFeign.java
  • 通过zuul服务网关访问shop应用

http://127.0.0.1:(zuul服务网关的端口号)/api-shop/router

最终效果与上面的直接访问shop的效果是一样的,主要区别就是访问路径发生了变化。被zuul网关拦截处理,再进行转发请求shop应用。具体zuul配置请查看 \sea-service-zuul\src\main\resources\application.yml
  • 修改git仓库配置文件属性值,实现动态刷新spring bean属性

git使用的是我的码云的项目(https://gitee.com/zhoubang85/springcloud-config-test

具体需要测试的地方在 \sea-web-shop\src\main\java\pers\zb\web\shop\controller\ShopController.java中的@Value("${message}")

这个message的值是shop应用启动的时候从config配置中心获取的,而配置中心是从git远程仓库获取的

当git仓库的配置文件属性值发生了变化后,要想让shop应用在不需要重启的状态下,动态刷新@Value("${message}")的值,就需要结合Bus消息总线来实现

故:本地需要提前安装好rabbitmq,这里就不演示如何安装了,请自行解决

下面开始操作:

1、首先查看一下message的值,浏览器访问http://localhost:(shop应用的端口号)/config/hello ,显示的内容就是当前应用上下文中的message属性值

2、访问上面的码云git项目,找到sea-web-shop-dev.properties属性文件,修改文件中的message属性值并提交

3、git仓库中午文件修改之后,shop应用并没有动态更新message的值,需要我们手动调用一下接口http://localhost:(shop应用的端口号)/bus/refresh ,该接口只支持POST请求,本地测试的话建议使用postmain工具

4、请求/bus/refresh后,及时切换到idea并打开shop应用控制台(如果启动多个shop应用的话,每个shop应用都会有更新),就会看到shop应用会自动获取git仓库最新内容,并实现动态更新bean属性值,其中的实现原理就是利用了MQ。

5、在shop应用不重启的情况下,浏览器再次访问http://localhost:(shop应用的端口号)/config/hello ,这时候你就会发现,显示的内容已经是git仓库最新值

  • Turbine聚合监控

当前项目都是集群环境,所以我们采用Turbine实现服务的监控;至于如何配置实现的,请查看\sea-web-shop\pom.xml与\sea-web-hystrix-dashboard\pom.xml中的相关依赖配置,以及启动类的注解配置。 访问仪表盘,查看服务运行状态:

1、浏览器访问http://localhost:2001/hystrix ,会进入Hystrix Dashboard界面;其中的2001是hystrix-dashboard应用的端口号

2、在文本框中输入要监控的服务地址http://localhost:(shop应用的端口号)/turbine.stream ,这里我们就监控shop应用,在title文本框中随意输入名称即可,然后点击Monitor Stream按钮进入监控后台页面

3、监控效果截图:
Hystrix Dashboard监控仪表盘

至于监控仪表的内容都是什么含义,请自行网上查找资料

  • Hystrix断路器效果

断路器的作用,我就不多说了,请网上自行查找资料了解

我本地启动的是2个shop应用实例,端口分别是8087、8088

在这2个应用都正常的情况下,浏览器分别访问这2个应用的/router方法(http://localhost:8087/router和http://localhost:8088/router), 都会正常的返回JSON结果,比如:{"personId":1,"name":"EurekaTest","age":30,"msg":"http://localhost:8084/person/1"}

这时候,我们随意关闭其中一个user服务(这里我关闭的是8087端口的服务),浏览器重新访问shop的/router方法

这时候你会发现:

  • 在前2、3分钟内,网页上显示的内容有可能是正常的JSON数据,有时会出现“hystrix断路器生效了...”的字样!说明断路器生效了
  • 然后等eureka注册中心剔除这个down掉的user节点后,再重新访问/router方法,你会发现一直返回的是正常的JSON数据,不再出现“hystrix断路器生效了...”的字样,毕竟还有一个user节点是可用状态的。

断路器效果:
Hystrix断路器效果

具体的断路器代码处理,请查看\sea-web-shop\src\main\java\pers\zb\web\shop\service\UserServiceFeign.java与UserServiceHystrix.java的相关注解,以及main启动类的相关注解

《发行版》板块的说明

《发行版》板块中的内容,是一些细化的springcloud技术的案例,方便大家的学习;在不同版本中,都是独立的技术,需要学习什么技术的,可以按照需要下载对应的案例源码; 详细的内容,请看当前项目上面菜单栏中的《发行版》。

项目动态

目前项目中只有这几样技术内容,涉及到多数springcloud的技术,后面会根据自己所学,一点点的积累,基础学习之后再进行深入的研究学习,并在项目中更新并分享给大家。

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