一、zk配置文件 zoo.cfg（我自己新建的）：

# 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=/Users/huluwa/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

• tickTime：用于計(jì)算的時(shí)間單元。比如session超時(shí)：N*tickTime。
• initLimit：用于集群的，允許節(jié)點(diǎn)連接并同步到master節(jié)點(diǎn)的初始化時(shí)間，以tickTime的倍數(shù)來(lái)表示。
• syncLimit：用于集群，master主節(jié)點(diǎn)與 從節(jié)點(diǎn)之間發(fā)送消息，請(qǐng)求和 應(yīng)答的時(shí)間長(zhǎng)度。（心跳機(jī)制）
  如果從節(jié)點(diǎn)超過(guò)一定時(shí)間就會(huì)被拋棄。
• dataDir：必須配置。zk的一些數(shù)據(jù)，如日志啥的，都會(huì)存在此路徑下。
• datalogDir：日志目錄，如果不配置會(huì)和dataDir公用。
• clientPort：連接服務(wù)器的端口，默認(rèn)2181

現(xiàn)在的配置只是單機(jī)環(huán)境，后面集群環(huán)境再配置。

二、運(yùn)行zk

在安裝目錄的bin目錄下啟動(dòng)服務(wù)器：

./zkServer.sh start