Zookeeper入门操作

服务注册

根据上一讲Eureka基础继续讲解使用，其实原理都是一样都是注册服务。

zookepper

Eureka停止更新了你怎么办?

只要技术有用处就不怕他会消失

zookeeper是一个分布式协调工具，可以实现注册中心功能

我们用zookeeper服务器取代Eureka服务器，zk作为服务注册中心

首先应该在虚拟机下载zk，关闭防火墙可以尝试ping地址查看是否能相互ping通即可

创建支付模块cloud-provider-payment8004

配置pom

xml复制代码 <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.cloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- SpringBoot整合zookeeper客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--先排除自带的zookeeper3.5.3-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</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>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
    </dependencies>

配置yml,这里我们发现其实注册器配置基本相同

yaml复制代码server:
  port: 8004

spring:
  application:
    name: cloud-provider-payment
  cloud:
    zookeeper:
      connect-string: 116.62.12.158:2181

启动类注解 @EnableDiscoveryClient

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

写Controller

java复制代码@RestController
public class PayMentController {
    @Value("${server.port}")
    private String port;

    @GetMapping("payment/zk")
    public String payment(){
        return "zookeeper" + port+ UUID.randomUUID().toString();
    }
}

创建客服端模块cloud-consumer-zk-order80

还是按步骤来 pom配置

xml复制代码<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.cloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- SpringBoot整合zookeeper客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--先排除自带的zookeeper3.5.3-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</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>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
    </dependencies>

配置yml

yml复制代码server:
  port: 80

spring:
  application:
    name: cloud-order-service
  cloud:
    zookeeper:
      connect-string: 116.62.12.158:2181

启动类注解

java复制代码
@SpringBootApplication
@EnableDiscoveryClient
public class ZkOrder80 {
    public static void main(String[] args) {
        SpringApplication.run(ZkOrder80.class,args);
    }
}

配置RestTemplate

java复制代码@Configuration
public class Application {

    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    {
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        return restTemplate;
    }
}

controller

java复制代码@RestController
public class OrderController {

    @Resource
    private RestTemplate restTemplate;

    private static final String   PAYMENT_URL = "http://cloud-provider-payment";
    @GetMapping("order/zk")
    public String orderzk(){
        String result = restTemplate.getForObject(PAYMENT_URL+"/payment/zk", String.class);
        return result;
    }
}