zookeeper stat nc 如何禁止

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小咪咪 2024-09-12 10:03:07

文章标签 zookeeper linux debian hadoop 数据 文章分类 运维

1、启停脚本

1.1、启动脚本

1.2、关闭脚本

1.3、启动关闭一体化

2、选举机制

3、客户端命令行操作

3.1、命令行语法

3.2、znode 节点数据信息

3.3、节点类型（持久/短暂/有序号/无序号）

3.4、监听器原理

3.5、节点删除与查看

1、启停脚本

1.1、启动脚本

#!/bin/sh
echo "start zkServer..."
for i in 01 02 03
do
  ssh eshop-cache$i "source /etc/profile;/usr/local/module/zookeeper-3.4.10/bin/zkServer.sh start"
done
echo "zookeeper集群启动完成"

1.2、关闭脚本

#!/bin/sh
echo "start zkServer..."
for i in 01 02 03
do
  ssh eshop-cache$i "source /etc/profile;/usr/local/module/zookeeper-3.4.10/bin/zkServer.sh stop"
done
echo "zookeeper集群关闭完成"

1.3、启动关闭一体化

#! /bin/bash
case $1 in
"start"){
	for i in hadoop102 hadoop103 hadoop104
	do
		ssh $i "/opt/module/zookeeper-3.4.10/bin/zkServer.sh start"
	done
	};;
"stop"){
	for i in hadoop102 hadoop103 hadoop104
	do
		ssh $i "/opt/module/zookeeper-3.4.10/bin/zkServer.sh stop"
	done
	};;
esac

2、选举机制

zookeeper stat nc 如何禁止_debian

zookeeper stat nc 如何禁止_linux_02

3、客户端命令行操作

3.1、命令行语法

zookeeper stat nc 如何禁止_数据_03

zookeeper stat nc 如何禁止_linux_04

1）启动客户端

[kgf@hadoop102 zookeeper-3.5.7]$ bin/zkCli.sh -server hadoop102:2181

2）显示所有操作命令

[zk: hadoop102:2181(CONNECTED) 1] help

3.2、znode 节点数据信息

1）查看当前znode中所包含的内容

[zk: hadoop102:2181(CONNECTED) 1] ls /
[zookeeper]
[zk: hadoop102:2181(CONNECTED) 2]

2）查看当前节点详细数据

[zk: hadoop102:2181(CONNECTED) 2] ls -s /
[zookeeper]cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1

[zk: hadoop102:2181(CONNECTED) 3]

（1）czxid：创建节点的事务 zxid

每次修改 ZooKeeper 状态都会产生一个 ZooKeeper 事务 ID。事务 ID 是 ZooKeeper 中所有修改总的次序。每次修改都有唯一的 zxid，如果 zxid1 小于 zxid2，那么 zxid1 在 zxid2 之前发生。

（2）ctime：znode 被创建的毫秒数（从 1970 年开始）

（3）mzxid：znode 最后更新的事务 zxid

（4）mtime：znode 最后修改的毫秒数（从 1970 年开始）

（5）pZxid：znode 最后更新的子节点 zxid

（6）cversion：znode 子节点变化号，znode 子节点修改次数

（7）dataversion：znode 数据变化号

（8）aclVersion：znode 访问控制列表的变化号

（9）ephemeralOwner：如果是临时节点，这个是 znode 拥有者的 session id。如果不是临时节点则是 0。

（10）dataLength：znode 的数据长度

（11）numChildren：znode 子节点数量

3.3、节点类型（持久/短暂/有序号/无序号）

zookeeper stat nc 如何禁止_linux_05

1）分别创建2个普通节点（永久节点 + 不带序号）

[zk: hadoop102:2181(CONNECTED) 3]  create /sanguo "diaochan"
 Created /sanguo
 [zk: hadoop102:2181(CONNECTED) 4] create /sanguo/shuguo "liubei"
 Created /sanguo/shuguo
 [zk: hadoop102:2181(CONNECTED) 5]注意：创建节点时，要赋值
2）获得节点的值
[zk: hadoop102:2181(CONNECTED) 5] get -s /sanguo
 diaochan
 cZxid = 0x200000004
 ctime = Sat Apr 27 19:32:16 CST 2024
 mZxid = 0x200000004
 mtime = Sat Apr 27 19:32:16 CST 2024
 pZxid = 0x200000005
 cversion = 1
 dataVersion = 0
 aclVersion = 0
 ephemeralOwner = 0x0
 dataLength = 8
 numChildren = 1
 [zk: hadoop102:2181(CONNECTED) 6][zk: hadoop102:2181(CONNECTED) 6] get -s /sanguo/shuguo
 liubei
 cZxid = 0x200000005
 ctime = Sat Apr 27 19:32:46 CST 2024
 mZxid = 0x200000005
 mtime = Sat Apr 27 19:32:46 CST 2024
 pZxid = 0x200000005
 cversion = 0
 dataVersion = 0
 aclVersion = 0
 ephemeralOwner = 0x0
 dataLength = 6
 numChildren = 0
 [zk: hadoop102:2181(CONNECTED) 7]3）创建带序号的节点（永久节点 + 带序号）
（1）先创建一个普通的根节点/sanguo/weiguo
[zk: hadoop102:2181(CONNECTED) 7] create /sanguo/weiguo "caocao"
 Created /sanguo/weiguo
 [zk: hadoop102:2181(CONNECTED) 8]（2）创建带序号的节点
[zk: hadoop102:2181(CONNECTED) 8] create -s /sanguo/weiguo/zhangliao "zhangliao"
 Created /sanguo/weiguo/zhangliao0000000000
 [zk: hadoop102:2181(CONNECTED) 9] create -s /sanguo/weiguo/zhangliao "zhangliao"
 Created /sanguo/weiguo/zhangliao0000000001
 [zk: hadoop102:2181(CONNECTED) 10] create -s /sanguo/weiguo/xuchu "xuchu"
 Created /sanguo/weiguo/xuchu0000000002
 [zk: hadoop102:2181(CONNECTED) 11]

如果原来没有序号节点，序号从 0 开始依次递增。如果原节点下已有 2 个节点，则再排序时从 2 开始，以此类推。

4）创建短暂节点（短暂节点 + 不带序号 or 带序号）

（1）创建短暂的不带序号的节点
[zk: hadoop102:2181(CONNECTED) 11] create -e /sanguo/wuguo "zhouyu"
 Created /sanguo/wuguo
 [zk: hadoop102:2181(CONNECTED) 12]（2）创建短暂的带序号的节点
[zk: hadoop102:2181(CONNECTED) 12] create -e -s /sanguo/wuguo "zhouyu"
 Created /sanguo/wuguo0000000003
 [zk: hadoop102:2181(CONNECTED) 13]（3）在当前客户端是能查看到的
[zk: hadoop102:2181(CONNECTED) 13] ls /sanguo
 [shuguo, weiguo, wuguo, wuguo0000000003]
 [zk: hadoop102:2181(CONNECTED) 14]（4）退出当前客户端然后再重启客户端
[zk: localhost:2181(CONNECTED) 12] quit
[kgf@hadoop104 zookeeper-3.5.7]$ bin/zkCli.sh
（5）再次查看根目录下短暂节点已经删除
[zk: localhost:2181(CONNECTED) 0] ls /sanguo
 [shuguo, weiguo]
 [zk: localhost:2181(CONNECTED) 1]

5）修改节点数据值

[zk: localhost:2181(CONNECTED) 1] get -s /sanguo/weiguo
caocao
 cZxid = 0x200000006
 ctime = Sat Apr 27 19:35:31 CST 2024
 mZxid = 0x200000006
 mtime = Sat Apr 27 19:35:31 CST 2024
 pZxid = 0x200000009
 cversion = 3
 dataVersion = 0
 aclVersion = 0
 ephemeralOwner = 0x0
 dataLength = 6
 numChildren = 3
 [zk: localhost:2181(CONNECTED) 2] set /sanguo/weiguo "simayi"
 [zk: localhost:2181(CONNECTED) 3] get -s /sanguo/weiguo
simayi
 cZxid = 0x200000006
 ctime = Sat Apr 27 19:35:31 CST 2024
 mZxid = 0x200000010
 mtime = Sat Apr 27 19:44:54 CST 2024
 pZxid = 0x200000009
 cversion = 3
 dataVersion = 1
 aclVersion = 0
 ephemeralOwner = 0x0
 dataLength = 6
 numChildren = 3
 [zk: localhost:2181(CONNECTED) 4]

3.4、监听器原理

客户端注册监听它关心的目录节点，当目录节点发生变化（数据改变、节点删除、子目录节点增加删除）时，ZooKeeper 会通知客户端。监听机制保证 ZooKeeper 保存的任何的数据的任何改变都能快速的响应到监听了该节点的应用程序。

zookeeper stat nc 如何禁止_linux_06

1）节点的值变化监听

（1）在 hadoop104 主机上注册监听/sanguo 节点数据变化
[zk: localhost:2181(CONNECTED) 26] get -w /sanguo
（2）在 hadoop103 主机上修改/sanguo 节点的数据
[zk: localhost:2181(CONNECTED) 1] set /sanguo "xisi"
（3）观察 hadoop104 主机收到数据变化的监听
[zk: localhost:2181(CONNECTED) 0] get -w /sanguo
 diaochan
 [zk: localhost:2181(CONNECTED) 1]
 WATCHER::WatchedEvent state:SyncConnected type:NodeDataChanged path:/sanguo

注意：在hadoop103再多次修改/sanguo的值，hadoop104上不会再收到监听。因为注册一次，只能监听一次。想再次监听，需要再次注册

2）节点的子节点变化监听（路径变化）

（1）在 hadoop104 主机上注册监听/sanguo 节点的子节点变化
[zk: localhost:2181(CONNECTED) 1]  ls -w /sanguo
 [shuguo, weiguo]
 [zk: localhost:2181(CONNECTED) 2]（2）在 hadoop103 主机/sanguo 节点上创建子节点
[zk: localhost:2181(CONNECTED) 1]  create /sanguo/jin "simayi"
 Created /sanguo/jin
 [zk: localhost:2181(CONNECTED) 2]（3）观察 hadoop104 主机收到子节点变化的监听
[zk: localhost:2181(CONNECTED) 1]  ls -w /sanguo
 [shuguo, weiguo]
 [zk: localhost:2181(CONNECTED) 2]
 WATCHER::WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/sanguo

注意：节点的路径变化，也是注册一次，生效一次。想多次生效，就需要多次注册。

3.5、节点删除与查看

1）删除节点
[zk: localhost:2181(CONNECTED) 2] delete /sanguo/jin
 [zk: localhost:2181(CONNECTED) 3]2）递归删除节点
[zk: localhost:2181(CONNECTED) 3] deleteall /sanguo/shuguo
 [zk: localhost:2181(CONNECTED) 4]3）查看节点状态
[zk: localhost:2181(CONNECTED) 4] stat /sanguo
 cZxid = 0x200000004
 ctime = Sat Apr 27 19:32:16 CST 2024
 mZxid = 0x200000013
 mtime = Sat Apr 27 19:56:06 CST 2024
 pZxid = 0x200000016
 cversion = 9
 dataVersion = 1
 aclVersion = 0
 ephemeralOwner = 0x0
 dataLength = 4
 numChildren = 1
 [zk: localhost:2181(CONNECTED) 5]

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