前言

SpringCloud使用ZooKeeper作为服务注册，主要用于纪录部署过程。

一、VMware安装和ZooKeeper环境搭建

• 环境搭建

1. VMware Workstation15虚拟机安装教程
2. CentOS 7镜像下载 （我安装的是精简版的）
3. VMware安装Centos7超详细过程（图文）
4. centos7 安装jdk1.8环境
5. # centos7上安装zookeeper
   

• 启动ZooKeeper

1. 首先关闭CentOS的防火墙

//关闭防火墙
[root@localhost bin]# systemctl stop firewalld
//查看状态
[root@localhost bin]# systemctl status  firewalld

2. 进入ZooKeeper的bin目录

//启动ZooKeeper
[root@localhost bin]# ./zkServer.sh start
//查看状态
[root@localhost bin]# ./zkServer.sh status
//启动ZooKeeper客户端
[root@localhost bin]# ./zkCli.sh 
//查看ZooKeeper服务
[zk: localhost:2181(CONNECTED) 0] ls /
//查看注册进ZooKeeper的服务
[zk: localhost:2181(CONNECTED) 1] ls /services

二、服务提供者

• pom文件

    <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.huzh.springcloud</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>
            <!--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>
    </dependencies>

• yml文件

#8004表示注册到zookeeper服务器的服务提供者端口号
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: 192.168.118.128:2181

• 启动类

@SpringBootApplication
@EnableDiscoveryClient //该注解用于向使用consul或者zookeeper作为注册中心时注册服务
public class PaymentMain8004 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8004.class, args);
    }
}

• controller文件

只提供controller供测试

@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();
    }
}

三、服务调用者

• pom文件

通服务提供者

• yml文件

server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
    #注册到zookeeper地址
    zookeeper:
      connect-string: 192.168.118.128:2181

• 启动类

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

• 配置文件

配置Rest组件配置

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

• controller文件

@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;
    }
}