Linux系统（CentOS7.4）安装zookeeper

1.创建软件安装路径：

mkdir -p /usr/local/services/zookeeper

2.进入刚创建的目录

cd /usr/local/services/zookeeper

3.下载 zookeeper-3.4.9.tar.gz 到该目录

wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz

4、解压缩安装包

tar -zxvf zookeeper-3.4.9.tar.gz

解压完毕删除安装包

rm zookeeper-3.4.9.tar.gz

5、进入到解压目录下的conf目录中

cd zookeeper-3.4.9/conf/

6、复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg

cp zoo_sample.cfg zoo.cfg

7.用 vim 打开 zoo.cfg 文件并修改其内容为如下

# The number of milliseconds of each tick

# zookeeper 定义的基准时间间隔，单位：毫秒
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=/tmp/zookeeper

# 数据文件夹
dataDir=/usr/local/services/zookeeper/zookeeper-3.4.9/data

# 日志文件夹
dataLogDir=/usr/local/services/zookeeper/zookeeper-3.4.9/logs

# the port at which the clients will connect
# 客户端访问 zookeeper 的端口号
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

保存并关闭：ESC——:wq

8.用 vim 打开 /etc/ 目录下的配置文件 profile：

vim /etc/profile

在其尾部追加如下内容并保存关闭：

#idea - zookeeper-3.4.9 config start - 2017-12-09
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 end - 2017-12-09

9.使 /etc/ 目录下的 profile 文件即可生效：

source /etc/profile

10.进入到解压目录下的bin目录中：

cd /usr/local/services/zookeeper/zookeeper-3.4.9/bin
或者
cd ../bin/

11、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

12.查询 zookeeper 状态：

zkServer.sh status

13.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

14.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