這裡安裝的是可生產用的 zookeeper 集群，非偽分布式集群。提前準備三颱伺服器。並且都已經安裝jdk 1.8。其 ip 對映如下：
192.168.56.101 worker-01 worker-01.joyxj.com
192.168.56.102 worker-02 worker-02.joyxj.com
192.168.56.103 worker-03 worker-03.joyxj.com
wget
tar -zxvf apache-zookeeper-3.5.5-bin.tar.gz
mv apache-zookeeper-3.5.5-bin zzookeeper-3.5.5
mkdir -p /var/lib/zookeeper
拷貝乙份配置檔案zoo_sample.cfg,重新命名為zoo.cfg。配置以下內容:
# 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.
# 配置資料目錄
datadir=/var/lib/zookeeper
# the port at which the clients will connect
# 配置埠
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.
## ## 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
# 配置集群資訊，下面的worker-*也可以用 ip 替代。
server.1=worker-01:2888:3888
server.2=worker-02:2888:3888
server.3=worker-03:2888:3888
這一步的操作每台伺服器上不致。
在worker-01伺服器上的操作：
echo
"1"> /var/lib/zookeeper/myid
在worker-02伺服器上的操作：
echo
"2"> /var/lib/zookeeper/myid
在worker-03伺服器上的操作：
echo
"3"> /var/lib/zookeeper/myid
以上寫入/var/lib/zookeeper/myid的值分別對應配置集群時的server後面的值。
比如：對於 worker-01 這台伺服器，其配置的對應關係是server.1=worker-01:2888:3888,所以寫入/var/lib/zookeeper/myid的值是1。
執行命令sh bin/zkserver.sh start分別啟動三颱伺服器。啟動後可以用sh bin/zkserver.sh status檢視伺服器的狀態。
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