基于dubbo2.5.5+zookeeper3.4.9的服务搭建

参考资料：https://segmentfault.com/a/1190000009568509
https://segmentfault.com/a/1190000004654903

0. 环境

Java: jdk1.8.0_144

OS: Windows 10(宿主机192.168.1.105)/Ubuntu 15.10(虚拟机192.168.1.21)

Tomcat: apache-tomcat-7.0.68

1. 下载zookeeper部署到虚拟机

• 下载：`wget http://www.apache.org/dist/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz`
• 解压：`tar -zxvf zookeeper-3.4.9.tar.gz`
• 配置zookeeper：`mv /usr/zookeeper-3.4.9/conf/zoo_sample.cfg /usr/zookeeper-3.4.9/conf/zoo.cfg`
• 启动：在/usr/zookeeper-3.4.9/bin目录下执行`./zkServer.sh start`

2. 下载dubbo源码后打包dubbo-admin并部署到虚拟机

• git下载dubbo源码：https://github.com/alibaba/dubbo/tree/dubbo-2.5.5
• 修改dubbo-admin/src/main/webapp/WEB-INF/dubbo.properties文件的注册地址：dubbo.registry.address=zookeeper://192.168.1.21:2181
• 打包生成war文件并部署到虚拟机(注意：需要隐藏项目名，否则内部跳转易出错)
• 启动tomcat后访问http://192.168.1.21:8080/，用户名密码：root

3. 创建项目并完成配置

• 完成发布和消费服务的编码，见https://github.com/hivsuper/demos/tree/master/dubbo-demo
• 发布服务与zookeeper的连接配置applicationProvider.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
  http://www.springframework.org/schema/beans/spring-beans.xsd 
  http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd ">
  <dubbo:application name="dubbo-demo-provider" />
  <!-- zookeeper注册中心 -->
  <dubbo:registry address="zookeeper://192.168.1.21:2181" />
  <dubbo:protocol name="dubbo" port="20880" />

  <!-- 和本地bean一样实现服务 -->
  <bean id="demoService1" class="org.lxp.dubbo.service.DemoServiceImpl" />
  <bean id="demoService2" class="org.lxp.dubbo.service.DemoServiceImpl2" />

  <!-- 向注册中心注册暴漏服务地址,注册服务 -->
  <dubbo:service interface="org.lxp.dubbo.service.DemoService" ref="demoService1" executes="10" version="1.0.1" />
  <dubbo:service interface="org.lxp.dubbo.service.DemoService" ref="demoService2" executes="10" version="1.0.2" />

</beans>

• 消费服务与zookeeper的连接配置applicationConsumer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
  <dubbo:application name="dubbo-demo-consumer" />

  <dubbo:registry address="zookeeper://192.168.1.21:2181" />

  <!-- 向注册中心订阅服务 -->
  <dubbo:reference id="demoService1" interface="org.lxp.dubbo.service.DemoService" version="1.0.1" />
  <dubbo:reference id="demoService2" interface="org.lxp.dubbo.service.DemoService" version="1.0.2" />
</beans> 

4. 启动发布服务

• 运行dubbo-demo-provider模块BootStrap类的main方法

• 服务已注册成功，见http://192.168.1.21:8080/governance/services

5. 启动消费服务并测试

• tomcat7-maven-plugin插件运行dubbo-demo-consumer应用成功后，可以见到消费者已注册

• 访问http://192.168.1.105:8080/dubbo-consumer/swagger-ui.html可测试API