SpringCloud学习笔记——服务注册中心——Zookeeper

SpringCloud学习笔记——服务注册中心——Zookeeper

参考：尚硅谷2020最新版SpringCloud(H版&alibaba)——周阳

2. Zookeeper

zookeeper安装

1. 下载zookeeper

   wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz

2. 解压

   tar -xvzf zookeeper-3.4.14.tar.gz

3. 进入conf文件夹，复制一份zoo_sample.cfg并重命名为zoo.cfg

   cd conf

   cp zoo_sample.cfg zoo.cfg

4. 修改配置文件

   dataDir=/home/naclo/soft/zookeeper/data
   dataLogDir=/home/naclo/soft/zookeeper/log
   

5. 配置环境变量

   • 使用vi打开etc目录下的profile文件vi /etc/profile

   • 在末尾配置环境变量

     export ZOOKEEPER_HOME=/home/naclo/soft/zookeeper-3.4.14
     export PATH=$PATH:$ZOOKEEPER_HOME/bin
     

   • 写入信息保存，使配置文件生效

     source /etc/profile

6. 启动zookeeper

   zkServer.sh start

7. 停止zookeeper

   zkServer.sh stop

8. 关闭防火墙

   systemctl stop firewalld

9. 连接zookeeper客户端

   ./zkCli.sh

10. 查看当前节点数

    ls /

创建服务提供者并注册

1. 创建子模块，子模块名称

   cloud-provider-payment8004

2. pom依赖

   <dependencies>
       <!-- SpringBoot整合Web组件 -->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>
       <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
           <groupId>com.naclo</groupId>
           <artifactId>cloud-api-commons</artifactId>
           <version>${project.version}</version>
       </dependency>
       <!-- SpringBoot整合zookeeper客户端 -->
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
           <!--排除自带的zookeeper3.5.3-->
           <exclusions>
               <exclusion>
                   <groupId>org.apache.zookeeper</groupId>
                   <artifactId>zookeeper</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
       <!--添加zookeeper3.4.14和服务器版本一致-->
       <dependency>
           <groupId>org.apache.zookeeper</groupId>
           <artifactId>zookeeper</artifactId>
           <version>3.4.14</version>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-devtools</artifactId>
           <scope>runtime</scope>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.projectlombok</groupId>
           <artifactId>lombok</artifactId>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-test</artifactId>
           <scope>test</scope>
       </dependency>
   </dependencies>
   

3. 创建application.yml

   #8004表示注册到zookeeper服务器的支付服务提供者端口号
   server:
     port: 8004
   
   #服务别名----注册zookeeper到注册中心名称
   spring:
     application:
       name: cloud-provider-payment
     cloud:
       zookeeper:
         connect-string: 192.168.119.128:2181
   

4. 创建主启动类PaymentMain8004

   @SpringBootApplication
   @EnableDiscoveryClient
   public class PaymentMain8004 {
       public static void main(String[] args) {
           SpringApplication.run(PaymentMain8004.class, args);
       }
   }
   

5. 编写PaymentController

   @RestController
   @Slf4j
   public class PaymentController {
       @Value("${server.port}")
       private String serverPort;
   
       @RequestMapping(value = "/payment/zk")
       public String paymentzk() {
           return "springcloud with zookeeper: " + serverPort + "\t" + UUID.randomUUID().toString();
       }
   }
   

6. 版本冲突解决

   <!-- SpringBoot整合zookeeper客户端 -->
   <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
       <!--排除自带的zookeeper3.5.3-->
       <exclusions>
           <exclusion>
               <groupId>org.apache.zookeeper</groupId>
               <artifactId>zookeeper</artifactId>
           </exclusion>
       </exclusions>
   </dependency>
   <!--添加zookeeper3.4.14和服务器版本一致-->
   <dependency>
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
       <version>3.4.14</version>
   </dependency>
   

7. 启动，测试
   

创建服务消费者并注册

1. 创建子模块，子模块名称

   cloud-consumerzk-order80

2. pom依赖

   <dependencies>
       <!-- SpringBoot整合Web组件 -->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>
       <!-- SpringBoot整合zookeeper客户端 -->
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
           <!--排除自带的zookeeper3.5.3-->
           <exclusions>
               <exclusion>
                   <groupId>org.apache.zookeeper</groupId>
                   <artifactId>zookeeper</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
       <!--添加zookeeper3.4.14和服务器版本一致-->
       <dependency>
           <groupId>org.apache.zookeeper</groupId>
           <artifactId>zookeeper</artifactId>
           <version>3.4.14</version>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-devtools</artifactId>
           <scope>runtime</scope>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.projectlombok</groupId>
           <artifactId>lombok</artifactId>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-test</artifactId>
           <scope>test</scope>
       </dependency>
   </dependencies>
   

3. 创建application.yml

   server:
     port: 80
   
   spring:
     application:
       name: cloud-consumer-order
     cloud:
       #注册到zookeeper地址
       zookeeper:
         connect-string: 192.168.119.128:2181
   

4. 创建主启动类OrderZKMain80

   @SpringBootApplication
   @EnableDiscoveryClient
   public class OrderZKMain80 {
       public static void main(String[] args) {
           SpringApplication.run(OrderZKMain80.class, args);
       }
   }
   

5. 引入RestTemplate

   @Configuration
   public class ApplicationContextConfig {
       @Bean
       @LoadBalanced
       public RestTemplate getRestTemplate() {
           return new RestTemplate();
       }
   }
   

6. 编写controller

   @RestController
   @Slf4j
   public class OrderZKController {
       public static final String INVOKE_URL = "http://cloud-provider-payment";
   
       @Resource
       private RestTemplate restTemplate;
   
       @GetMapping(value = "/consumer/payment/zk")
       public String paymentInfo() {
           String result = restTemplate.getForObject(INVOKE_URL + "/payment/zk", String.class);
           return result;
       }
   }
   

7. 启动，测试