搭建zookeeper集群

环境centos6.8

准备zookeeper安装包：zookeeper-3.4.6.tar.gz

单节点搭建

解压

$ tar -zxf zookeeper-3.4.6.tar.gz
$ cd zookeeper-3.4.6
$ mkdir data

 创建配置文件

使用命令vi“conf / zoo.cfg"打开名为 conf / zoo.cfg 的配置文件，并将所有以下参数设置为起点。

$ vi conf/zoo.cfg
tickTime=2000
dataDir=/path/to/zookeeper/data
clientPort=2181
initLimit=5
syncLimit=2

一旦配置文件成功保存并再次返回终端，您可以启动zookeeper服务器。

 启动ZooKeeper服务器

$ bin/zkServer.sh start

执行此命令后，您将得到如下所示的响应 -

$ JMX enabled by default
$ Using config: /Users/../zookeeper-3.4.6/bin/../conf/zoo.cfg
$ Starting zookeeper ... STARTED

 启动CLI

$ bin/zkCli.sh

输入上面的命令后，您将被连接到zookeeper服务器，并将获得以下响应。

Connecting to localhost:2181
................
................
................
Welcome to ZooKeeper!
................
................
WATCHER::
WatchedEvent state:SyncConnected type: None path:null
[zk: localhost:2181(CONNECTED) 0]

停止Zookeeper服务器

连接服务器并执行所有操作后，可以使用以下命令停止zookeeper服务器 -

$ bin/zkServer.sh stop

集群搭建

解压

tar -zxf zookeeper-3.4.6.tar.gz

移动到特定目录

mv zookeeper-3.4.6 /uer/zookeeper01

准备配置文件，从zookeeper/conf/zoo_sample.cfg中复制

cd /uer/zookeeper01/conf

cp zoo_sample.cfg zoo.cfg

创建data目录

cd ../

mkdir data

cd data

创建一个id

echo 1 >> myid

可以检查一下

vi myid

然后退出目录

cd ../../

复制多份zookeeper文件

cp -r zookeeper01 zookeeper02

cp -r zookeeper01 zookeeper03

修改myid

vi zookeeper02/data/myid

改成2

vi zookeeper03/data/myid

改成3

修改配置文件

vi zookeeper01/conf/zoo.cfg

修改日志目录

修改端口

修改server信息

修改完成的如下：

# 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=/usr/zookeeper01/data

# the port at which the clients will connect

clientPort=2181

server.1=127.0.0.1:2881:3881

server.2=127.0.0.1:2882:3882

server.3=127.0.0.1:2883:3883

# 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

 其他两个节点，需要修改文件目录和端口，server信息不需要修改，保持完全一样即可

执行命令启动服务：

zookeeper01/bin/zkServer.sh start

zookeeper02/bin/zkServer.sh start

zookeeper03/bin/zkServer.sh start

查看状态，判断主机和从机：

 zookeeper01/bin/zkServer.sh status

 zookeeper02/bin/zkServer.sh status

 zookeeper03/bin/zkServer.sh status

Mode: follower：从机

Mode: leader:  主机

进入zookeeper

zookeeper03/bin/zkCli.sh

进入zookeeper界面后，可以执行zk命令，如果不知道zk的命令，就瞎写几个字母，然后就会有命令的提示

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

close 

connect host:port