Dubbox小案例
一。安装zookeeper
1. 进入阿里云的容器服务，搜索zookeeper：https://cr.console.aliyun.com/cn-hangzhou/images
2. 复制网址
3. 下载镜像
[root@ay120tum0is24xe ~]# docker image list REPOSITORY TAG IMAGE ID CREATED SIZE mysql 5.6 27e29668a08a 6 weeks ago 256MB [root@ay120tum0is24xe ~]# docker image pull registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper Using default tag: latest latest: Pulling from zuowenbo/zookeeper 8e3ba11ec2a2: Pull complete 311ad0da4533: Pull complete 391a6a6b3651: Pull complete 1e5180f6c6f9: Pull complete Digest: sha256:d7531d8bec4b2f2a298fceaaaaeac8f5c7d223d4a9ea2136cf0af23110c83ae8 Status: Downloaded newer image for registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper:latest [root@ay120tum0is24xe ~]# docker image list -a REPOSITORY TAG IMAGE ID CREATED SIZE mysql 5.6 27e29668a08a 6 weeks ago 256MB registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper latest 64e049ee9478 6 months ago 148MB [root@ay120tum0is24xe ~]#
4. 修改镜像名称
[root@ay120tum0is24xe ~]# docker image tag registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper:latest zookeeper:latest [root@ay120tum0is24xe ~]# docker image list -a REPOSITORY TAG IMAGE ID CREATED SIZE mysql 5.6 27e29668a08a 6 weeks ago 256MB registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper latest 64e049ee9478 6 months ago 148MB zookeeper latest 64e049ee9478 6 months ago 148MB [root@ay120tum0is24xe ~]# docker image rm registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper:latest Untagged: registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper:latest Untagged: registry.cn-hangzhou.aliyuncs.com/zuowenbo/zookeeper@sha256:d7531d8bec4b2f2a298fceaaaaeac8f5c7d223d4a9ea2136cf0af23110c83ae8 [root@ay120tum0is24xe ~]# docker image list -a REPOSITORY TAG IMAGE ID CREATED SIZE mysql 5.6 27e29668a08a 6 weeks ago 256MB zookeeper latest 64e049ee9478 6 months ago 148MB [root@ay120tum0is24xe ~]#
5. 启动容器
[root@ay120tum0is24xe ~]# docker container run --name zookeeper001 -d -p 2181:2181 zookeeper:latest // 后面的为容器里的端口 838d94a2d1c7120639c4d8219d26e718330d11a93e3e3989027a4ce61c7f32d4 [root@ay120tum0is24xe ~]# docker container run --name zookeeper002 -d -p 2182:2181 zookeeper:latest df4357e92486490918c5a63ab7adec038eb5beddb8d1d42a04a8c9041df9fadf [root@ay120tum0is24xe ~]# docker container list CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES df4357e92486 zookeeper:latest "/opt/zookeeper/bin/…" 19 seconds ago Up 18 seconds (health: starting) 2888/tcp, 3888/tcp, 0.0.0.0:2182->2181/tcp zookeeper002 838d94a2d1c7 zookeeper:latest "/opt/zookeeper/bin/…" 38 seconds ago Up 37 seconds (healthy) 2888/tcp, 0.0.0.0:2181->2181/tcp, 3888/tcp zookeeper001 [root@ay120tum0is24xe ~]#
--name：容器名称
-d：后台运行
-p：端口映射，冒号左边为主机端口，右边为容器端口
6. 进人容器zookeeper002
[root@ay120tum0is24xe ~]# docker container exec -it zookeeper002 /bin/sh /opt/zookeeper # ls LICENSE.txt build.xml ivy.xml zookeeper-3.4.13.jar NOTICE.txt conf ivysettings.xml zookeeper-3.4.13.jar.asc README.md contrib lib zookeeper-3.4.13.jar.md5 README_packaging.txt dist-maven recipes zookeeper-3.4.13.jar.sha1 bin docs src /opt/zookeeper #
7.通过主机 登录容器zookeeper001
/opt/zookeeper # ./bin/zkCli.sh -server 10.20.0.128:2181 [zk: 10.20.0.128:2181(CONNECTED) 0]
8. quit退出zookeeper001，exit 退出容器zookeeper002
二。安装dubbo-admin
1. 下载镜像
[root@ay120tum0is24xe ~]# docker image pull registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin [root@ay120tum0is24xe ~]# docker image list REPOSITORY TAG IMAGE ID CREATED SIZE registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin latest 4b43bc0f997e 3 weeks ago 360MB mysql 5.6 27e29668a08a 6 weeks ago 256MB zookeeper latest 64e049ee9478 6 months ago 148MB [root@ay120tum0is24xe ~]# docker image tag registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin dubbo-admin:latest [root@ay120tum0is24xe ~]# docker image rm registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin Untagged: registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin:latest Untagged: registry.cn-hangzhou.aliyuncs.com/zhaozhiwu/dubbo-admin@sha256:f23d8276e94ccfc5a6e5565ba6744c07f432869667fd08420d58148baf863910 [root@ay120tum0is24xe ~]# docker image list REPOSITORY TAG IMAGE ID CREATED SIZE dubbo-admin latest 4b43bc0f997e 3 weeks ago 360MB mysql 5.6 27e29668a08a 6 weeks ago 256MB zookeeper latest 64e049ee9478 6 months ago 148MB [root@ay120tum0is24xe ~]#
2. 运行容器
[root@192 ~]# docker run -d --add-host zk:10.20.0.129 -p 8090:8080 --name dubbo dubbo-admin 2e164333536a5b3c15260270e3939e9064cc11087824aaeac8bfbe379fea882c [root@192 ~]#
3. 浏览器登录：http://10.20.0.129:8090/ ，用户：root ，密码：root
三。新建项目
1. 建立空项目
2. 添加maven父工程，不用模板，工程名：parent
3. 修改 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.zgh</groupId> <artifactId>parent</artifactId> <version>1.0-SNAPSHOT</version> <packaging>pom</packaging> <!-- 集中定义依赖版本号 --> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <jackson.version>2.8.5</jackson.version> <junit.version>4.12</junit.version> <spring.version>4.2.4.RELEASE</spring.version> <pagehelper.version>4.0.0</pagehelper.version> <servlet-api.version>2.5</servlet-api.version> <dubbo.version>2.8.4</dubbo.version> <zookeeper.version>3.4.7</zookeeper.version> <zkclient.version>0.1</zkclient.version> <mybatis.version>3.2.8</mybatis.version> <mybatis.spring.version>1.2.2</mybatis.spring.version> <mybatis.paginator.version>1.2.15</mybatis.paginator.version> <mysql.version>5.1.32</mysql.version> <druid.version>1.0.9</druid.version> <commons-fileupload.version>1.3.1</commons-fileupload.version> <freemarker.version>2.3.23</freemarker.version> <activemq.version>5.11.2</activemq.version> <security.version>3.2.3.RELEASE</security.version> <solrj.version>4.10.3</solrj.version> <ik.version>2012_u6</ik.version> <mybatis.generator>1.3.5</mybatis.generator> </properties> <dependencies> <!--对象转换成json的转换器--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson.version}</version> </dependency> <!-- Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- dubbo相关 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>${dubbo.version}</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>${zookeeper.version}</version> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>${zkclient.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.9</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.28</version> </dependency> <dependency> <groupId>javassist</groupId> <artifactId>javassist</artifactId> <version>3.11.0.GA</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>${pagehelper.version}</version> </dependency> <!-- Mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <dependency> <groupId>com.github.miemiedev</groupId> <artifactId>mybatis-paginator</artifactId> <version>${mybatis.paginator.version}</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>${mybatis.generator}</version> </dependency> <!-- MySql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- 连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>org.csource.fastdfs</groupId> <artifactId>fastdfs</artifactId> <version>1.2</version> </dependency> <!-- 文件上传组件 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>${commons-fileupload.version}</version> </dependency> <!-- 缓存 --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.8.1</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.7.2.RELEASE</version> </dependency> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>${freemarker.version}</version> </dependency> <dependency> <groupId>org.apache.activemq</groupId> <artifactId>activemq-all</artifactId> <version>${activemq.version}</version> </dependency> <!-- 身份验证 --> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>4.1.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>4.1.0.RELEASE</version> </dependency> <dependency> <groupId>com.github.penggle</groupId> <artifactId>kaptcha</artifactId> <version>2.3.2</version> <exclusions> <exclusion> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-cas</artifactId> <version>4.1.0.RELEASE</version> </dependency> <dependency> <groupId>org.jasig.cas.client</groupId> <artifactId>cas-client-core</artifactId> <version>3.3.3</version> <!-- 排除log4j包冲突 --> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>log4j-over-slf4j</artifactId> </exclusion> </exclusions> </dependency> <!-- solr客户端 --> <dependency> <groupId>org.apache.solr</groupId> <artifactId>solr-solrj</artifactId> <version>${solrj.version}</version> </dependency> <dependency> <groupId>com.janeluo</groupId> <artifactId>ikanalyzer</artifactId> <version>${ik.version}</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> <version>4.4.4</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.3</version> </dependency> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>xml-apis</groupId> <artifactId>xml-apis</artifactId> <version>1.4.01</version> </dependency> </dependencies> <build> <finalName>${project.artifactId}</finalName> <pluginManagement> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> </resource> </resources> </build> </project>
4. 先点击library，然后点击File-->new-->module，建立maven web工程：dubboxDemo-Service (服务提供者)，并继承父工程
5. pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>parent</artifactId> <groupId>com.zgh</groupId> <version>1.0-SNAPSHOT</version> <relativePath>../parent/pom.xml</relativePath> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubboxDemo-Service</artifactId> <packaging>war</packaging> <name>dubboxDemo-Service Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <build> <finalName>${artifactId}</finalName> <plugins> <!-- 配置Tomcat插件 --> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <!--服务启动端口从9000开始--> <port>9000</port> <!--发布路径，发布到Tomcat的根目录，不用写项目(虚拟路径)名访问--> <path>/</path> <uriEncoding>UTF-8</uriEncoding> <!--插件里显示的名称--> <server>tomcat7</server> </configuration> </plugin> </plugins> </build> </project>
6. 同理建立工程：dubboxDemo-web （服务消费者）
<?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>parent</artifactId> <groupId>com.zgh</groupId> <version>1.0-SNAPSHOT</version> <relativePath>../parent/pom.xml</relativePath> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubboxDemo-web</artifactId> <packaging>war</packaging> <name>dubboxDemo-web Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <build> <finalName>${artifactId}</finalName> <plugins> <!-- 配置Tomcat插件 --> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <!--服务启动端口从9000开始--> <port>9001</port> <!--发布路径，发布到Tomcat的根目录，不用写项目(虚拟路径)名访问--> <path>/</path> <uriEncoding>UTF-8</uriEncoding> <!--插件里显示的名称--> <server>tomcat7</server> </configuration> </plugin> </plugins> </build> </project>
四。配置dubboxDemo-Service
1. dubboxDemo-Service 工程新建接口： UserService
package com.dubboxDemo.service;
public interface UserService {
public String getName();
}
2. 实现这个接口
package com.dubboxDemo.service.impl; import com.alibaba.dubbo.config.annotation.Service; import com.dubboxDemo.service.UserService; @Service public class UserServiceImpl implements UserService { @Override public String getName() { return "我的 dubboDemo"; } }
3. 配置applicationContext-service.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"> <!--服务名称，可修改，默认为工程名--> <dubbo:application name="dubboxdemo-service"/> <!--注册地址--> <dubbo:registry address="zookeeper://10.20.0.129:2181"/> <!--实现接口的包名称--> <dubbo:annotation package="com.dubboxDemo.service.impl"/> <!--<dubbo:protocol name="dubbo" host="192.168.1.4" port="20883" />--> </beans>
4. 配置web.xml
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <!-- 加载spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <!--配置路径--> <param-value>classpath:applicationContext*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>
五。配置dubboxDemo-web
1. 把工程dubboxDemo-Service里的接口 UserService 复制下来，包路径要两者一样
2. 实现控制器
package com.dubboxDemo.controller; import com.alibaba.dubbo.config.annotation.Reference; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.dubboxDemo.service.UserService; @Controller @RequestMapping("/user") public class UserController { @Reference private UserService userService; @RequestMapping("/showName") @ResponseBody public String showName(){ return userService.getName(); } }
3. 配置applicationContext-web.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:mvc="http://www.springframework.org/schema/mvc" 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://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!--mvc 转换器--> <mvc:annotation-driven > <mvc:message-converters register-defaults="false"> <!--转换成字符串--> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <constructor-arg value="UTF-8" /> </bean> </mvc:message-converters> </mvc:annotation-driven> <!-- 引用dubbo 服务 --> <dubbo:application name="dubboxdemo-web" /> <!--注册地址--> <dubbo:registry address="zookeeper://10.20.0.129:2181"/> <!--调用服务的包路径--> <dubbo:annotation package="com.dubboxDemo.controller"/> </beans>
4. 配置web.xml
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <!-- 解决post乱码 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <!--符合url的才会处理乱码--> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--所有请求由SpringMVC管理,即交给DispatcherServlet--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--springMVC 配置文件--> <param-value>classpath:applicationContext-web.xml</param-value> </init-param> </servlet> <!--符合url的才会转交--> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
六。测试
1. 运行dubboxDemo-Service（服务提供者）
2. dubbo-admin查看，服务提供者的信息（ip地址和端口(默认20880)等）存储到了zookeepe
3. 同理启动dubboxDemo-web（服务消费者），然后浏览器输入：http://localhost:9001/user/showName.do ，服务消费者会去注册中心zookeepe拿到服务提供者的ip地址和端口(默认20880)，然后到该地址和端口调用
4. dubbo-admin查看，已经被消费了
