大数据环境搭建--02 Centos7安装Zookeeper3.

注意：我们将大数据相关组件全部安装在/opt/bigdata目录

1.下载zookeeper安装包

[root@cluster201 bigdata]# pwd
/opt/bigdata
[hadoop@cluster201 bigdata]$ wget http://mirror.bit.edu.cn/apache/zookeeper/stable/zookeeper-3.4.10.tar.gz

2.解压

[root@cluster201 bigdata]# pwd
/opt/bigdata
[hadoop@cluster201 bigdata]$ tar -zvxf zookeeper-3.4.10.tar.gz

3. 修改环境变量，在/etc/profile文件中增加如下内容

#zookeeper
export ZOOKEEPER_HOME=/opt/bigdata/zookeeper-3.4.10
export PATH=$PATH:$ZOOKEEPER_HOME/bin

用source命令让配置文件生效

[root@cluster201 bigdata]# source /etc/profile

4.在/opt/bigdata/zookeeper-3.4.10下创建存放数据与日志的目录

[root@cluster201 bigdata]# pwd
/opt/bigdata/zookeeper-3.4.10
[root@cluster201 zookeeper-3.4.10]# mkdir data
[root@cluster201 zookeeper-3.4.10]# mkdir log

5.修改配置文件(cluster201/cluster202/cluster203执行同样的操作)

先拷贝样本配置文件

[root@cluster201 conf]# pwd
/opt/bigdata/zookeeper-3.4.10/conf
[root@cluster201 conf]# cp zoo_sample.cfg zoo.cfg

将zoo.cfg的内容修改如下

# 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.
#配置数据存放目录
dataDir=/opt/bigdata/zookeeper-3.4.10/data
#配置日志存放目录
dataLogDir=/opt/bigdata/zookeeper-3.4.10/log
# 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
#配置集群地址
server.1=cluster201:2888:3888
server.2=cluster202:2888:3888
server.3=cluster203:2888:3888

6.在data目录中创建myid文件

cluster201(192.168.88.201)

[root@cluster201 zookeeper-3.4.10]# pwd
/opt/bigdata/zookeeper-3.4.10
[root@cluster201 zookeeper-3.4.10]# echo 1 > data/myid

cluster202(192.168.88.202)

[root@cluster202 zookeeper-3.4.10]# pwd
/opt/bigdata/zookeeper-3.4.10
[root@cluster202 zookeeper-3.4.10]# echo 2 > data/myid

cluster203(192.168.88.203)

[root@cluster203 zookeeper-3.4.10]# pwd
/opt/bigdata/zookeeper-3.4.10
[root@cluster203 zookeeper-3.4.10]# echo 3 > data/myid

7.zookeeper的启动、停止、状态查看,三台执行相同操作

#启动zookeeper
[hadoop@cluster201 zookeeper-3.4.10]$ zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/bigdata/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
#查看Java进程
[hadoop@cluster201 zookeeper-3.4.10]$ jps
2814 QuorumPeerMain
2846 Jps
#查看zookeeper状态
[hadoop@cluster201 zookeeper-3.4.10]$ zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/bigdata/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower
#停止zookeeper
[hadoop@cluster201 zookeeper-3.4.10]$ zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /opt/bigdata/zookeeper-3.4.10/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
#重启zookeeper
[hadoop@cluster201 zookeeper-3.4.10]$ zkServer.sh restart

Paste_Image.png

8.zookeeper基本命令

#链接到集群
[hadoop@cluster201 zookeeper-3.4.10]$ zkCli.sh -server cluster201:2181
#查看帮助
[zk: cluster201:2181(CONNECTED) 0] help
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
    close 
    connect host:port