Centos 7 安装部署 zookeeper

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本文详细介绍了如何在Centos 7系统中安装并部署Zookeeper，包括客户端连接步骤和基本命令操作，是Zookeeper初学者的实用指南。

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客户端连接： zkCli.cmd(sh) -server ip:2181

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

解压缩 zookeeper-3.4.9.tar.gz：
tar -zxvf zookeeper-3.4.9.tar.gz -C /agui/zookeeper/

进入到 /agui/zookeeper/zookeeper-3.4.9/conf 目录中：
cd /agui/zookeeper/zookeeper-3.4.9/conf/

复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg：
cp zoo_sample.cfg  zoo.cfg
rm -f zoo_sample.cfg



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 zoo.cfg 文件:

配置环境变量(此配置可有可无)

进入到 /agui/zookeeper/zookeeper-3.4.9/bin 目录中：
cd ../bin/

用 vim 打开 /etc/ 目录下的配置文件 profile：
vim /etc/profile
并在其尾部追加如下内容：
# 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

使 /etc/ 目录下的 profile 文件即可生效：
source /etc/profile

zookeeper基本命令

 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

 查询 zookeeper 状态：
    zkServer.sh status

 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

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