Zookeeper QuickStart

环境版本

• 操作系统：CentOS release 6.6 (Final)
• java版本: jdk1.8
• zookeeper版本: zookeeper-3.4.11

一、 安装jdk

此处省略

二、 安装zookeeper

2.1 下载源码包，并解压

官网下载地址：http://www.apache.org/dyn/closer.cgi/zookeeper

wget http://mirror.olnevhost.net/pub/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz
tar zxvf zookeeper-3.4.11.tar.gz  
mv zookeeper-3.4.11 /usr/local/zookeeper

2.2 修改环境变量

编辑 /etc/profile 文件, 在文件末尾添加以下环境变量配置:

# ZooKeeper Env
export ZOOKEEPER_HOME=/usr/local/zookeeper
export PATH=$PATH:$ZOOKEEPER_HOME/bin

运行以下命令使环境变量生效: source /etc/profile

2.3 重命名配置文件

初次使用 ZooKeeper 时,需要将$ZOOKEEPER_HOME/conf 目录下的 zoo_sample.cfg 重命名为 zoo.cfg, zoo.cfg

mv  $ZOOKEEPER_HOME/conf/zoo_sample.cfg $ZOOKEEPER_HOME/conf/zoo.cfg

2.4 单机模式--修改配置文件

创建目录/usr/local/zookeeper/data 和/usr/local/zookeeper/logs 修改配置文件

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/usr/local/zookeeper/data
dataLogDir=/usr/local/zookeeper/logs
clientPort=2181

2.5 启动 ZooKeeper 服务

# cd /usr/local/zookeeper/zookeeper-3.4.11/bin
# ./zkServer.sh  start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Mode: follower

2.6 验证zooKeeper服务

服务启动完成后，可以使用 telnet 和 stat 命令验证服务器启动是否正常:

# telnet 127.0.0.1 2181
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
stat
Zookeeper version: 3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
Clients:
/127.0.0.1:48430[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x0
Mode: standalone
Node count: 4
Connection closed by foreign host.

2.7 停止 ZooKeeper 服务

想要停止 ZooKeeper 服务, 可以使用如下命令:

# cd /usr/local/zookeeper/zookeeper-3.4.11/bin
# ./zkServer.sh  stop
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED