在CentOS7上安装和使用ZooKeeper最新版本（V3.4.12）-白红宇

在CentOS7上安装和使用ZooKeeper最新版本（V3.4.12）

阅读量：6340 次

发布时间：2019-06-22

本文共 6018 字，大约阅读时间需要 20 分钟。

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

cd /usr/
local/src

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

mkdir -p ../zookeeper

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

cd ../zookeeper/zookeeper-3.4.12/conf

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

cd ..

./bin/zkServer.sh
start

输出如下信息，表示启动成功

Connecting
to 127.0.0.1:2181

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

2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:host.name=jiaodacailei-thinkpad-centos7

2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_161

2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation

2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jdk1.8.0_161/jre

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

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

2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp

2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>

2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux

2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64

2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0-693.el7.x86_64

2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root

2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root

2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/zookeeper/zookeeper-3.4.11

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

Welcome
to ZooKeeper!

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)

JLine support
is enabled

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

[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

WATCHER::

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：

ZooKeeper -server host:port cmd args

stat path [watch]

set path data [version]

ls
path [watch]

delquota [-n|-b]
path

ls2
path [watch]

setAcl
path acl

setquota -n|-b val
path

history

redo cmdno

printwatches
on|off

delete path [version]

sync path

listquota
path

rmr
path

get path [watch]

create [-s] [-e] path data acl

addauth scheme auth

quit

getAcl
path

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

[
zk: 127.0.0.1:2181(CONNECTED) 4] create /zk_test test_data

Created /zk_test

[
zk: 127.0.0.1:2181(CONNECTED) 6] ls /

[
zookeeper, zk_test]

[
zk: 127.0.0.1:2181(CONNECTED) 7] get /zk_test

test_data

cZxid =
0x2

ctime = Fri Feb
09 15:19:11 CST 2018

mZxid =
0x2

mtime = Fri Feb
09 15:19:11 CST 2018

pZxid =
0x2

cversion =
0

dataVersion =
0

aclVersion =
0

ephemeralOwner =
0x0

dataLength =
9

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 = 0x2ctime = Fri Feb 09 15:19:11 CST 2018mZxid = 0x3mtime = Fri Feb 09 15:21:31 CST 2018pZxid = 0x2cversion = 0dataVersion = 1aclVersion = 0ephemeralOwner = 0x0dataLength = 16numChildren = 0

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

test_data_changecZxid = 0x2ctime = Fri Feb 09 15:19:11 CST 2018mZxid = 0x3mtime = Fri Feb 09 15:21:31 CST 2018pZxid = 0x2cversion = 0dataVersion = 1aclVersion = 0ephemeralOwner = 0x0dataLength = 16numChildren = 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