zookeeper客户端操作

1、当zk服务端启动起来的时候，可以使用客户端链接服务端通过./zkCli.sh
2、进入客户端窗口后使用ls / 表示查看根目录下的节点信息
3、get /zookeeper 表示获取节点信息

[zk: localhost:2181(CONNECTED) 0] ls /
[services, zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /services
[cloud-provider-payment]
[zk: localhost:2181(CONNECTED) 2] ls /services/cloud-provider-payment
[b2da939e-ae55-47ae-a668-1413d3d6aa7c]
[zk: localhost:2181(CONNECTED) 3] ls /services/cloud-provider-payment/b2da939e-ae55-47ae-a668-1413d3d6aa7c
[]
[zk: localhost:2181(CONNECTED) 4] get /services/cloud-provider-payment/b2da939e-ae55-47ae-a668-1413d3d6aa7c
{"name":"cloud-provider-payment","id":"b2da939e-ae55-47ae-a668-1413d3d6aa7c","address":"48J6N00BZKBYAOE","port":8004,"sslPort":null,"payload":{"@class":"org.springframework.cloud.zookeeper.discovery.ZookeeperInstance","id":"application-1","name":"cloud-provider-payment","metadata":{}},"registrationTimeUTC":1651128478063,"serviceType":"DYNAMIC","uriSpec":{"parts":[{"value":"scheme","variable":true},{"value":"://","variable":false},{"value":"address","variable":true},{"value":":","variable":false},{"value":"port","variable":true}]}}
cZxid = 0x23
ctime = Wed Apr 27 23:48:05 PDT 2022
mZxid = 0x23
mtime = Wed Apr 27 23:48:05 PDT 2022
pZxid = 0x23
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x100001d2d260001
dataLength = 536
numChildren = 0

{
    "address": "48J6N00BZKBYAOE",
    "id": "b2da939e-ae55-47ae-a668-1413d3d6aa7c",
    "name": "cloud-provider-payment",
    "payload": {
        "@class": "org.springframework.cloud.zookeeper.discovery.ZookeeperInstance",
        "id": "application-1",
        "metadata": {},
        "name": "cloud-provider-payment"
    },
    "port": 8004,
    "registrationTimeUTC": 1651128478063,
    "serviceType": "DYNAMIC",
    "uriSpec": {
        "parts": [
            {
                "value": "scheme",
                "variable": true
            },
            {
                "value": "://",
                "variable": false
            },
            {
                "value": "address",
                "variable": true
            },
            {
                "value": ":",
                "variable": false
            },
            {
                "value": "port",
                "variable": true
            }
        ]
    }
}

zookeeper 服务节点是临时节点，不是持久节点，服务下线，zookeeper服务节点数据就会删除。

注意：整合zookeeper 的时候，一定要保证zookeeper 的jar包版本和zookeeper服务器版本一致，否则会导致各种问题。

       <!-- springboot整合zookeeper客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <version>3.1.1</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--添加3.4.14版本 -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
        </dependency>