zookeeper注册中心

使用zookeeper作为注册中心就不需要像eureka一样，在写一个eureka-server的服务了，因为zookeeper本身就是一个服务端，所以只需要编写需要进行服务注册的客户端即可

依赖

<!-- zookeeper 注册中心 -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
</dependency>

主程序

@SpringBootApplication
@EnableDiscoveryClient
public class ZookeeperApp {

    public static void main(String[] args) {
        SpringApplication.run(ZookeeperApp.class, args);
    }
}

配置zookeeper注册中心

spring:
  application:
    name: provide-zookeeper
  cloud:
    zookeeper:
      connect-string: localhost:2181  # zookeeper连接地址

启动该服务后，在zookeeper中就可以看到在services目录下有了一个provide-zookeeper文件夹，provide-zookeeper就是指的provide-zookeeper服务，下面会有一个个的实例，可以获取到实例的信息

1
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get /services/provide-zookeeper/39a78506-f2cb-4c8f-bbab-768f1f9fc702
{"name":"provide-zookeeper","id":"39a78506-f2cb-4c8f-bbab-768f1f9fc702","address":"192.168.1.124","port":8004,"sslPort":null,"payload":{"@class":"org.springframework.cloud.zookeeper.discovery.ZookeeperInstance","id":"application-1","name":"provide-zookeeper","metadata":{}},"registrationTimeUTC":1630313091916,"serviceType":"DYNAMIC","uriSpec":{"parts":[{"value":"scheme","variable":true},{"value":"://","variable":false},{"value":"address","variable":true},{"value":":","variable":false},{"value":"port","variable":true}]}}

服务节点在zookeeper中注册的是临时节点

可以看到该节点的ephemeralOwner不为0