[TOC]
说明： 本学习主要对尚硅谷大数据研发部《zookeeper视频》记录，一下文字来源这个视频PPT
注意： Zookeeper 版本 3.4
命令行操作
连接zk集群
bin/zkCli.sh -server localhost:2181,localhost:2182,localhost:2183
查看zk集群中谁是leader 和当前zk的状态：
bin/zkServer.sh status
ls
查看当前znode中包含的内容
[zk: localhost:2181(CONNECTED) 3] ls /
[zookeeper]
ls2
查看当前znode详细数据
[zk: localhost:2181(CONNECTED) 4] ls2 /
[zookeeper]
cZxid = 0x0
ctime = Thu Jan 01 00:00:00 GMT 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 GMT 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1
create
创建节点， 如果原来没有序号节点，序号从0开始一次递增，如果原节点下已有2个节点，则再排序时从2开始，依次类推
[zk: localhost:2181(CONNECTED) 6] create /flag success #注意需要写值，不然失败
Created /flag
[zk: localhost:2181(CONNECTED) 7] ls /
[flag, zookeeper]
选择
-e : 短暂节点
-s: 序列节点
默认是持久节点。 create -e -s /flag success
get
获取节点值
[zk: localhost:2181(CONNECTED) 8] get /flag
success
cZxid = 0x20000001e
ctime = Fri Apr 26 14:02:15 GMT 2019
mZxid = 0x20000001e
mtime = Fri Apr 26 14:02:15 GMT 2019
pZxid = 0x20000001e
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 0
set
修改数据节点
[zk: localhost:2181(CONNECTED) 4] set /flag maizi
cZxid = 0x20000001e
ctime = Fri Apr 26 14:02:15 GMT 2019
mZxid = 0x20000002a
mtime = Fri Apr 26 14:16:14 GMT 2019
pZxid = 0x20000001e
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0
get path [watch]
监听值的变化
2181窗口
[zk: localhost:2181(CONNECTED) 10] get /flag watch
maizi
cZxid = 0x20000001e
ctime = Fri Apr 26 14:02:15 GMT 2019
mZxid = 0x20000002f
mtime = Fri Apr 26 14:23:43 GMT 2019
pZxid = 0x20000001e
cversion = 0
dataVersion = 5
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0
[zk: localhost:2181(CONNECTED) 11]
WATCHER::
WatchedEvent state:SyncConnected type:NodeDataChanged path:/flag #这里就监控到了
[zk: localhost:2181(CONNECTED) 7] set /flag xiaoqiang
cZxid = 0x20000001e
ctime = Fri Apr 26 14:02:15 GMT 2019
mZxid = 0x200000030
mtime = Fri Apr 26 14:24:06 GMT 2019
pZxid = 0x20000001e
cversion = 0
dataVersion = 6
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 9
numChildren = 0
注意：每一次watch，只能监控一次， 下次在set操作，不会在进行监控。
ls path watch
监听路径变化，和上面的一样，只监控一次。
WATCHER::
WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/flag
delete path
删除节点
[zk: localhost:2181(CONNECTED) 8] delete /ok0000000003
[zk: localhost:2181(CONNECTED) 9] ls /
[flag, zookeeper]
rmr path
递归删除节点
[zk: localhost:2181(CONNECTED) 12] ls /
[flag, zookeeper]
[zk: localhost:2181(CONNECTED) 13] delete /flag
Node not empty: /flag
[zk: localhost:2181(CONNECTED) 14] rmr /flag
[zk: localhost:2181(CONNECTED) 15] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 16]
stat path
查看节点状态
[zk: localhost:2181(CONNECTED) 16] stat /zookeeper
cZxid = 0x0
ctime = Thu Jan 01 00:00:00 GMT 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 GMT 1970
pZxid = 0x200000019
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 3
stat结构体
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