一、安装介质
https://archive.apache.org/dist/zookeeper/zookeeper-3.4.5/
二、安装方法
1、解压安装包
[root@hadoop-server01 conf]# tar -xvf zookeeper-3.4.5.tar.gz -C /usr/local/apps/
2、修改配置文件
[root@hadoop-server01 conf]# cp zoo_sample.cfg zoo.cfg
[root@hadoop-server01 conf]# vi zoo.cfg
# 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=/usr/local/apps/zookeeper-3.4.5/data
# the port at which the clients will connect
clientPort=2181
#
# 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
server.1=hadoop-server01:2888:3888
server.2=hadoop-server02:2888:3888
server.3=hadoop-server03:2888:3888
#说明
#2888端口代表leader和follower之间通讯端口
#3888代表follower和follower之间的投票端口
3、创建myid文件
[root@hadoop-server01 data]# cd /usr/local/apps/zookeeper-3.4.5/data
[root@hadoop-server01 data]# echo 1 > myid
4、将节点1修改的文件分发到其它节点
[root@hadoop-server01 apps]# scp -r zookeeper-3.4.5/ root@hadoop-server02:/usr/local/apps/
[root@hadoop-server01 apps]# scp -r zookeeper-3.4.5/ root@hadoop-server03:/usr/local/apps/
5、修改myid文件
[root@hadoop-server02 data]# cd /usr/local/apps/zookeeper-3.4.5/data
[root@hadoop-server02 data]# echo 2 > myid
[root@hadoop-server03 data]# cd /usr/local/apps/zookeeper-3.4.5/data
[root@hadoop-server03 data]# echo 3 > myid
6、启动zk服务
[root@hadoop-server01 bin]# ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hadoop-server01 bin]# jps
2514 QuorumPeerMain
2531 Jps
[root@hadoop-server02 bin]# ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hadoop-server02 bin]# jps
2403 QuorumPeerMain
2434 Jps
[root@hadoop-server03 bin]# ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hadoop-server03 bin]# jps
2352 QuorumPeerMain
2377 Jps
7、查看当前节点的工作模式
[root@hadoop-server01 bin]# ./zkServer.sh status
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Mode: follower
[root@hadoop-server02 bin]# ./zkServer.sh status
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Mode: leader
[root@hadoop-server03 bin]# ./zkServer.sh status
JMX enabled by default
Using config: /usr/local/apps/zookeeper-3.4.5/bin/../conf/zoo.cfg
Mode: follower
特点：
（1）集群中只要有半数以上的节点活跃，集群服务可以正常提供
（2）集群中配置的节点数最好为基数个