在CentOS7上安装和使用ZooKeeper最新版本（V3.4.11）

0.ZooKeeper文档

http://zookeeper.apache.org/doc/r3.4.11/zookeeperOver.html

1.准备

在CentOS7上安装zookeeper时，如下工具必须要有：wget

如果没有，则进行安装：

yum -y install wget

下载到本地

1.  
   cd /usr/local/src
2.  
   wget http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz

解压

tar -xzvf zookeeper-3.4.11.tar.gz

创建的安装目录，并移动解压后的目录到其下

1.  
   mkdir -p ../zookeeper
2.  
   mv zookeeper-3.4.11/ ../zookeeper

创建数据目录，用于存放数据

mkdir -p /var/lib/zookeeper

创建配置

1.  
   cd ../zookeeper/zookeeper-3.4.11/conf
2.  
   cp zoo_sample.cfg zoo.cfg

修改其中配置dataDir：

vi zoo.cfg

dataDir=/var/lib/zookeeper

3.启动服务

1.  
   cd ..
2.  
   ./bin/zkServer.sh start

输出如下信息，表示启动成功

1.  
   Connecting to 127.0.0.1:2181
2.  
   2018-02-09 14:56:10,914 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
3.  
   2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:host.name=jiaodacailei-thinkpad-centos7
4.  
   2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_161
5.  
   2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
6.  
   2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jdk1.8.0_161/jre
7.  
   2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/local/zookeeper/zookeeper-3.4.11/bin/../build/classes:/usr/local/zookeeper/zookeeper-3.4.11/bin/../build/lib/*.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/netty-3.10.5.Final.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/log4j-1.2.16.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/audience-annotations-0.5.0.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../zookeeper-3.4.11.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../src/java/lib/*.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../conf::/usr/local/jdk/jdk1.8.0_161/lib/dt.jar:/usr/local/jdk/jdk1.8.0_161/lib/tools.jar:/usr/local/jdk/jdk1.8.0_161/jre/lib/dt.jar
8.  
   2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
9.  
   2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
10.  
    2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
11.  
    2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
12.  
    2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
13.  
    2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0-693.el7.x86_64
14.  
    2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
15.  
    2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
16.  
    2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/zookeeper/zookeeper-3.4.11
17.  
    2018-02-09 14:56:10,932 [myid:] - INFO [main:ZooKeeper@441] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@579bb367
18.  
    Welcome to ZooKeeper!
19.  
    2018-02-09 14:56:10,983 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1035] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
20.  
    JLine support is enabled
21.  
    2018-02-09 14:56:11,141 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@877] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
22.  
    [zk: 127.0.0.1:2181(CONNECTING) 0] 2018-02-09 14:56:11,242 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1302] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1000150f9ff0000, negotiated timeout = 30000
23.  
     
24.  
    WATCHER::
25.  
     
26.  
    WatchedEvent state:SyncConnected type:None path:null

4.启动客户端

./bin/zkCli.sh -server 127.0.0.1:2181

输入如下，等待用户输入命令：

[zk: 127.0.0.1:2181(CONNECTED) 0]

5.获取帮助

输入如下命令，可以获取帮助信息：

help

输出信息如下：

1.  
   ZooKeeper -server host:port cmd args
2.  
   stat path [watch]
3.  
   set path data [version]
4.  
   ls path [watch]
5.  
   delquota [-n|-b] path
6.  
   ls2 path [watch]
7.  
   setAcl path acl
8.  
   setquota -n|-b val path
9.  
   history
10.  
    redo cmdno
11.  
    printwatches on|off
12.  
    delete path [version]
13.  
    sync path
14.  
    listquota path
15.  
    rmr path
16.  
    get path [watch]
17.  
    create [-s] [-e] path data acl
18.  
    addauth scheme auth
19.  
    quit
20.  
    getAcl path
21.  
    close
22.  
    connect host:port

上面是所有可以使用的命令

6.ls命令

ls /

默认根节点下有一个zookeeper节点

[zookeeper]

7.创建节点

创建节点采用create命令，创建之后查看根路径，发现多了一个节点；

通过get命令，可以查询节点路径对应的数据

1.  
   [zk: 127.0.0.1:2181(CONNECTED) 4] create /zk_test test_data
2.  
   Created /zk_test

1.  
   [zk: 127.0.0.1:2181(CONNECTED) 6] ls /
2.  
   [zookeeper, zk_test]

1.  
   [zk: 127.0.0.1:2181(CONNECTED) 7] get /zk_test
2.  
   test_data
3.  
   cZxid = 0x2
4.  
   ctime = Fri Feb 09 15:19:11 CST 2018
5.  
   mZxid = 0x2
6.  
   mtime = Fri Feb 09 15:19:11 CST 2018
7.  
   pZxid = 0x2
8.  
   cversion = 0
9.  
   dataVersion = 0
10.  
    aclVersion = 0
11.  
    ephemeralOwner = 0x0
12.  
    dataLength = 9
13.  
    numChildren = 0

8.修改节点数据

set命令可以修改路径对应的节点数据，修改后再通过get命令查看结果

[zk: 127.0.0.1:2181(CONNECTED) 8] set /zk_test test_data_change

cZxid = 0x2
ctime = Fri Feb 09 15:19:11 CST 2018
mZxid = 0x3
mtime = Fri Feb 09 15:21:31 CST 2018
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 16
numChildren = 0

[zk: 127.0.0.1:2181(CONNECTED) 10] get /zk_test

test_data_change
cZxid = 0x2
ctime = Fri Feb 09 15:19:11 CST 2018
mZxid = 0x3
mtime = Fri Feb 09 15:21:31 CST 2018
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 16
numChildren = 0

9.删除节点

delete命令可以删除路径对应的节点，删除之后，通过ls命令查看其父路径，可以看到节点已经减少一个

1.  
   [zk: 127.0.0.1:2181(CONNECTED) 11] delete /zk_test
2.  
   [zk: 127.0.0.1:2181(CONNECTED) 12] ls /
3.  
   [zookeeper]

10.退出客户端

quit

11.停止服务

./bin/zkServer.sh stop

在CentOS7上安装和使用ZooKeeper最新版本（V3.4.11）

原文：https://www.cnblogs.com/telwanggs/p/9513582.html