【详解】Linux（CentOS）下安装Zookeeper服务

1.zookeeper是基于java环境的，所以首先在centos上装一个jdk

# yum install -y  java-1.8.0-openjdk-devel.x86_64

2.创建 /usr/local/services/zookeeper 文件夹

mkdir -p /usr/local/services/zookeeper

3.进入到 /usr/local/services/zookeeper 目录中

 cd /usr/local/services/zookeeper

4.下载 zookeeper-3.4.9.tar.gz

wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz

5、解压缩 zookeeper-3.4.9.tar.gz：

tar -zxvf zookeeper-3.4.9.tar.gz

6、进入到 /usr/local/services/zookeeper/zookeeper-3.4.9/conf 目录中：

 cd zookeeper-3.4.9/conf/

7、复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg： 

 cp zoo_sample.cfg zoo.cfg

8、用 vim 打开 zoo.cfg 文件并修改其内容为如下：

# 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/local/services/zookeeper/apache-zookeeper-3.5.9/data

# 日志文件夹
dataLogDir=/usr/local/services/zookeeper/apache-zookeeper-3.5.9/logs
# 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
~

9、保存并关闭 zoo.cfg 文件:

:wq

10、进入到 /usr/local/services/zookeeper/zookeeper-3.4.9/bin 目录中：
    cd ../bin/
 
11、用 vim 打开 /etc/ 目录下的配置文件 profile：

  vim /etc/profile

 
    # idea - zookeeper-3.4.9 config start - 2016-09-08
 
    export ZOOKEEPER_HOME=/usr/local/services/zookeeper/zookeeper-3.4.9/
    export PATH=$ZOOKEEPER_HOME/bin:$PATH
    export PATH
 
    # idea - zookeeper-3.4.9 config start - 2016-09-08

12、使 /etc/ 目录下的 profile 文件即可生效：

source /etc/profile

13、启动 zookeeper 服务：

zkServer.sh start
如打印如下信息则表明启动成功：
ZooKeeper JMX enabled by default
Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

14、查询 zookeeper 状态：   

 zkServer.sh status

15.关闭zookeeper服务

关闭 zookeeper 服务：
    zkServer.sh stop
    如打印如下信息则表明成功关闭：
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Stopping zookeeper ... STOPPED

16.重启zookeeper服务

zkServer.sh restart
    如打印如下信息则表明重启成功：
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Stopping zookeeper ... STOPPED
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED

OK，Zookeeper在Linux平台的安装到这儿就结束了。