在CentOS7上安装和使用ZooKeeper最新版本（V3.4.12）

zoukankan html css js c++ java

在CentOS7上安装和使用ZooKeeper最新版本（V3.4.12）
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
```
2.下载安装

下载到本地
1. cd /usr/local/src
3. wget http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.12/zookeeper-3.4.12.tar.gz
解压
```
tar -xzvf zookeeper-3.4.12.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-3.4.12/ ../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-3.4.12/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
24. WATCHER::
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
```
查看全文

相关阅读:
如何学习掌握一门新技术
 Linux多线程编程（不限Linux）
腾讯后台开发面试题2
腾讯后台开发面试题
 【转】Linux杀死fork产生的子进程的僵尸进程defunct
【转】Linux网络编程入门
 【转】揭开Socket编程的面纱
 【转】简单理解socket
【转】404、500、502等HTTP状态码介绍
 【转】fread函数和fwrite函数

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