ZooKeeper〖一〗在阿里云服务器上搭建伪分布式集群作为Dubbo注册中心
一. 准备工作
- 安装JDK
- 将Zookeeper上传到服务器
- 解压Zookeeper，并创建data目录，将conf下的zoo_sample.cfg文件改名为zoo.cfg
- 建立
/user/local/zookeeper-cluster,将解压后的Zookeeper复制到以下三个目录
/usr/local/zookeeper-cluster/zookeeper-1
/usr/local/zookeeper-cluster/zookeeper-2
/usr/local/zookeeper-cluster/zookeeper-3
- 配置每一个 Zookeeper 的 dataDir（zoo.cfg） clientPort 分别为 2181 2182 2183
修改/usr/local/zookeeper-cluster/zookeeper-1/conf/zoo.cfg
clientPort=2181
dataDir=/usr/local/zookeeper-cluster/zookeeper-1/data
修改/usr/local/zookeeper-cluster/zookeeper-2/conf/zoo.cfg
clientPort=2182
dataDir=/usr/local/zookeeper-cluster/zookeeper-2/data
修改/usr/local/zookeeper-cluster/zookeeper-3/conf/zoo.cfg
clientPort=2183
dataDir=/usr/local/zookeeper-cluster/zookeeper-3/data
二. 配置集群
-
在每个 zookeeper 的 data 目录下创建一个 myid 文件，内容分别是 1、2、3 。这个文件就是记录每个服务器的 ID
-
在每一个 zookeeper 的 zoo.cfg 配置客户端访问端口（clientPort）和集群服务器 IP 列表。
集群服务器 IP 列表如下
server.1=本机公网IP:2881:3881
server.2=本机公网IP:2882:3882
server.3=本机公网IP:2883:3883
quorumListenOnAllIPs=true
解释：server.服务器 ID=服务器 IP 地址：服务器之间通信端口：服务器之间投票选举端口
3.打开阿里云防火墙对应的端口,或关闭防火墙
三. 启动集群
分别进入到每一个zookeeper里,启动集群就是分别启动每个实例。
启动
./bin/zkServer.sh start
暂停
./bin/zkServer.sh stop
重启
./bin/zkServer.sh restart
查看状态:
./bin/zkServer.sh status
如果出现以下图片内容,我们的伪分布式就搭建好了,其实分布式与伪分布式步骤一样的,只不过在三台服务器上去操作如上步骤改一下IP即可
划红线的即是我们在一台机子上开启三个zookeeper形成伪分布式集群
特别说明一下:必须所有的集群zookeeper启动才能查看是否集群状态成功与否,不然可能会一直找不到原因(这里我也遇到排查了好一段时间)
参考了这篇博客搭建的伪分布式环境参考博客
四. springboot整合Dubbo
1. RPC服务接口
public interface IUserService {
public String sayHello(String name);
}
2. 服务提供者
1）添加依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
</parent>
<dependencies>
<!--dubbo-->
<dependency>
<groupId>com.alibaba.spring.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.0.0</version>
</dependency>
<!--spring-boot-stater-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<artifactId>log4j-to-slf4j</artifactId>
<groupId>org.apache.logging.log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!--zookeeper-->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.10</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.9</version>
<exclusions>
<exclusion>
<artifactId>slf4j-log4j12</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!--API-->
<dependency>
<groupId>com.itheima.demo</groupId>
<artifactId>dubbo-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
2）配置文件
# application.properties
spring.application.name=dubbo-demo-provider
spring.dubbo.application.id=dubbo-demo-provider
spring.dubbo.application.name=dubbo-demo-provider
spring.dubbo.registry.address=zookeeper://服务器公网IP:2181;zookeeper://服务器公网IP:2182;zookeeper://服务器公网IP:2183
spring.dubbo.server=true
spring.dubbo.protocol.name=dubbo
spring.dubbo.protocol.port=20880
3）启动类
@EnableDubboConfiguration
@SpringBootApplication
public class ProviderBootstrap {
public static void main(String[] args) throws IOException {
SpringApplication.run(ProviderBootstrap.class,args);
}
}
4）服务实现
@Component
@Service(interfaceClass = IUserService.class)
public class UserServiceImpl implements IUserService{
@Override
public String sayHello(String name) {
return "hello:"+name;
}
}
3. 服务消费者
1）添加依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--dubbo-->
<dependency>
<groupId>com.alibaba.spring.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<artifactId>log4j-to-slf4j</artifactId>
<groupId>org.apache.logging.log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!--zookeeper-->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.10</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.9</version>
<exclusions>
<exclusion>
<artifactId>slf4j-log4j12</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!--API-->
<dependency>
<groupId>com.itheima.demo</groupId>
<artifactId>dubbo-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
2）配置文件
# application.properties
server.port=8081
spring.application.name=dubbo-demo-consumer
spring.dubbo.application.name=dubbo-demo-consumer
spring.dubbo.application.id=dubbo-demo-consumer
spring.dubbo.registry.address=zookeeper://服务器公网IP:2181;zookeeper://服务器公网IP:2182;zookeeper://服务器公网IP:2183
3）启动类
@EnableDubboConfiguration
@SpringBootApplication
public class ConsumerBootstrap {
public static void main(String[] args) {
SpringApplication.run(ConsumerBootstrap.class);
}
}
4）Controller
@RestController
@RequestMapping("/user")
public class UserController {
@Reference
private IUserService userService;
@RequestMapping("/sayHello")
public String sayHello(String name){
return userService.sayHello(name);
}
}
四. 调用
我们启动服务提供者和消费者后,在本地通过RPC方式调用userService的sayHello方法结果如下
下一篇,我会通过整合消息队列与Dubbo调用方法来实现一个经典的例子~
