zk的单机部署，与客户端的使用

下载zk 

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1	wget https://archive.apache.org/dist/zookeeper/stable/apache-zookeeper-3.5.5-bin.tar.gz

安装jdk

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tar xf jdk-12.0.2_linux-x64_bin.tar.gz -C /usr/local/ vim /etc/profile.d/jdk.sh export JAVA_HOME=/usr/local/jdk export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$JAVA_HOME/bin:$PATH ln -s /usr/local/jdk-12.0.2 /usr/local/jdk

部署zk 

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mkdir /data/zk -pv tar xf apache-zookeeper-3.5.5-bin.tar.gz  -C /data/zk/ cp /data/zk/apache-zookeeper-3.5.5-bin/bin/../conf/zoo_sample.cfg /data/zk/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg 创建数据目录 mkdir /data/zk/data [root@master conf]# vim zoo.cfg   # The number of milliseconds of each tick tickTime=2000 # The number of ticks that the initial # synchronization phase can take initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/data/zk/data   数据目录 # the port at which the clients will connect clientPort=2181 # the maximum number of client connections. # increase this if you need to handle more clients #maxClientCnxns=60 # # Be sure to read the maintenance section of the # administrator guide before turning on autopurge. # # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance # # The number of snapshots to retain in dataDir #autopurge.snapRetainCount=3 # Purge task interval in hours # Set to "0" to disable auto purge feature #autopurge.purgeInterval=1

　　配置zk的环境变量

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[root@master conf]# vim /etc/profile.d/zk.sh   export ZOOKEEPER_HOME=/data/zk/apache-zookeeper-3.5.5-bin export ZOOBINDIR=/data/zk/apache-zookeeper-3.5.5-bin/bin export PATH=$ZOOKEEPER_HOME/bin:$PATH   [root@master conf]# exec bash

　　启动

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1	[root@master conf]# zkServer.sh start

　　客户端登录

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[root@master conf]# zkCli.sh [zk: localhost:2181(CONNECTED) 0] help   帮助 ZooKeeper -server host:port cmd args     addauth scheme auth     close     config [-c] [-w] [-s]     connect host:port     create [-s] [-e] [-c] [-t ttl] path [data] [acl]     delete [-v version] path     deleteall path     delquota [-n|-b] path     get [-s] [-w] path     getAcl [-s] path     history     listquota path     ls [-s] [-w] [-R] path     ls2 path [watch]     printwatches on|off     quit     reconfig [-s] [-v version] [[-file path] | [-members serverID=host:port1:port2;port3[,...]*]] | [-add serverId=host:port1:port2;port3[,...]]* [-remove serverId[,...]*]     redo cmdno     removewatches path [-c|-d|-a] [-l]     rmr path     set [-s] [-v version] path data     setAcl [-s] [-v version] [-R] path acl     setquota -n|-b val path     stat [-w] path     sync path Command not found: Command not found help [zk: localhost:2181(CONNECTED) 1] create /app4   创建node Created /app4 [zk: localhost:2181(CONNECTED) 2] create /app4/p-1 Created /app4/p-1 [zk: localhost:2181(CONNECTED) 3] create /app4/p-2 Created /app4/p-2 [zk: localhost:2181(CONNECTED) 4] create /app4/p-3 Created /app4/p-3 [zk: localhost:2181(CONNECTED) 5] ls -R / 查看node / /app1 /app2 /app4 /zookeeper /app1/p_1 /app1/p_2 /app1/p_3 /app4/p-1 /app4/p-2 /app4/p-3 /zookeeper/config /zookeeper/quota

　　客户端创建分布式锁

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[zk: localhost:2181(CONNECTED) 6] create -e /log Created /log [root@master data]# zkCli.sh [zk: localhost:2181(CONNECTED) 2] create -e /log   Node already exists: /log [zk: localhost:2181(CONNECTED) 3] stat -w /log  监控这个锁 cZxid = 0x14 ctime = Wed Sep 11 16:31:46 CST 2019 mZxid = 0x14 mtime = Wed Sep 11 16:31:46 CST 2019 pZxid = 0x14 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x100014034170002 dataLength = 0 numChildren = 0 退出第一个客户端；释放锁 [zk: localhost:2181(CONNECTED) 7] quit   WATCHER::   WatchedEvent state:Closed type:None path:null 2019-09-11 16:35:02,053 [myid:] - INFO  [main:ZooKeeper@1422] - Session: 0x100014034170002 closed 2019-09-11 16:35:02,053 [myid:] - INFO  [main-EventThread:ClientCnxn$EventThread@524] - EventThread shut down for session: 0x100014034170002 释放锁后 [zk: localhost:2181(CONNECTED) 4] WATCHER::   WatchedEvent state:SyncConnected type:NodeDeleted path:/log   [zk: localhost:2181(CONNECTED) 4] create -e /log  第二的 Created /log