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SpringCloud-2.0-周阳（6. 服务注册发现 – ZooKeeper）学习笔记

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文章目录



1. 准备工作

  • 在 Linux 上部署 Zookeeper

    我找的教程，也可以自行寻找


    https://www.cnblogs.com/zhiyouwu/p/11546097.html

  • 如果 Zookeeper 部署在 Linux 上，先关闭防火墙 

    systemctl stop firewalld

  • 开启 Zookeeper 

    ./zkServer.sh start

  • 开启 Zookeeper 后，查看 ip 

    ifconfig

    在这里插入图片描述

  • ping 一下 Windows 查看是否连通

    在这里插入图片描述

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  • 最后打开 Zookeeper 客户端 

    ./zkCli.sh



2. 服务提供者 Provider

  1. 新建一个模块 ：

    cloud-provider-payment-8004

  2. 修改 POM 文件 

    <dependencies>
    <dependency>
        <groupId>com.demo.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>${project.version}</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-zookeeper-discovery -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

  3. 编写 YML 

    server:
  port: 8004

spring:
  application:
    name: cloud-provider-payment
  # 这里和之前不同
  cloud:
    zookeeper:
      # 这里要换成自己 Liunx 系统的 IP
      connect-string: 192.168.142.120:2181

  4. 编写主启动类 

    @SpringBootApplication
@EnableDiscoveryClient
public class ZookeeperMain8004 {
    public static void main(String[] args) {
        SpringApplication.run(ZookeeperMain8004.class, args);
    }
}

  5. 编写业务类

  • Controller 

    @Slf4j
@RestController
public class PaymentController {
    @Value("${server.port}")
    private String serverPort;

    @GetMapping(value = "/payment/zk")
    public String paymentzk(){
        return "springcloud with zookeeper:"+serverPort+"\t"+ UUID.randomUUID().toString();
    }
}

  1. 启动 Zookeeper

    在这里插入图片描述

    在这里插入图片描述

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  2. 启动 8004

    在这里插入图片描述

    在这里插入图片描述

  3. 解决办法 

    	<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-zookeeper-discovery -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        <!--排除zk3.5.3-->
        <exclusions>
            <exclusion>
                <groupId>org.apache.zookeeper</groupId>
                <artifactId>zookeeper</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <!--添加zk 对应的版本，按照自己的 Zookeeper 版本来-->
    <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.4.11</version>
    </dependency>

  4. 重启 8004，没有报错成功启动

  5. 去 Zookeeper 上查看，是否注册进去

    在这里插入图片描述

    访问 ：http://localhost:8004/payment/zk

    在这里插入图片描述



3. 服务消费者 Consumer

  1. 新建一个模块 ：

    cloud-consumer-order-ZK-80

  2. 修改 POM 文件 

    <dependencies>
    <dependency>
        <groupId>com.demo.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>${project.version}</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-zookeeper-discovery -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        <!--排除zk3.5.3-->
        <exclusions>
            <exclusion>
                <groupId>org.apache.zookeeper</groupId>
                <artifactId>zookeeper</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <!--添加zk 对应的版本，按照自己的 Zookeeper 版本来-->
    <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.4.11</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

  3. 编写 YML 

    server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
    zookeeper:
      connect-string: 192.168.142.120:2181

  4. 编写主启动类 

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

  5. 编写业务类

  • 配置 RestTemplate 的 Bean 

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

  • 编写 Controller 

    @Slf4j
@RestController
public class OrderZKController {
    public static final String INVOME_URL = "http://cloud-provider-payment";

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/zk")
    public String payment (){
        String result = restTemplate.getForObject(INVOME_URL+"/payment/zk",String.class);
        return result;
    }
}

  1. 启动测试

    Zookeeper

    在这里插入图片描述

    访问 http://localhost/consumer/payment/zk

    在这里插入图片描述


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