Windows下ZooKeeper的配置和启动步骤——单机模式

1. 序

ZooKeeper的工作模式有三种：单机模式、集群模式、伪集群模式

2. 下载

2.1 zookeeper

可去ZooKeeper官网下载ZooKeeper的稳定版：zookeeper官网

2.2 jdk

由于Zookeeper使用Java编写，因此运行ZooKeeper之前需安装Java环境——配置JDK，且JDK版本应大于等于1.6

3 ZooKeeper配置

解压后，可得到如下目录：

zookeeper.png

3.1 cfg文件配置

进入conf文件夹，打开zoo_sample.cfg文件，具体内容为：
# 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=/tmp/zookeeper
# 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
在该文件夹下新建“zoo.cfg”文件（ZooKeeper启动时会找名为“zoo.cfg”文件并将其作为默认配置文件），并将zoo_sample.cfg中内容复制到该文件中，并做修改，修改后如下所示：
# 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=D:/zookeeper-3.4.9/data
# 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
至此，ZooKeeper在Windows中的安装配置完毕。

4 启动ZooKeeper

进入bin文件夹，可得如下目录：

bin.png

4.1 启动ZooKeeper服务器端

在Windows中双击“zkServer.cmd”；

4.2 启动ZooKeeper客户端

在Windows中双击“zkCli.cmd”；

注意：
上面两个步骤不能颠倒，否则ZooKeeper客户端不能成功启动。

5 添加系统变量

ZOOKEEPER_HOME:D:/zookeeper-3.4.9
Path: 在现有的值后面添加 ";%ZOOKEEPER_HOME%\bin;"