zookeeper3.4.14集群搭建

0 前置条件

主机gcw1，gcw2，gcw3

• JDK

1 zk下载

华为镜像

2 上传解压

[root@gcw2 src]# tar -zxvf zookeeper-3.4.14.tar.gz -C  /opt/app/

3 配置文件修改

三台主机同样配置

[root@gcw3 src]# cd /opt/app/zookeeper-3.4.14/conf/
[root@gcw3 conf]# cp zoo_sample.cfg  zoo.cfg 
[root@gcw3 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=/data/zookeeper/zd
# 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
server.1=gcw1:2888:3888
server.2=gcw2:2888:3888
server.3=gcw3:2888:3888

4 myid文件创建

去到dataDir=/data/zookeeper/zd目录下根据配置创建

server.1=gcw1:2888:3888
server.2=gcw2:2888:3888
server.3=gcw3:2888:3888

例如主机gcw1

[root@gcw1 src]#  cd /data/zookeeper/zd
[root@gcw1 zd]# vi myid
[root@gcw1 zd]# cat myid
1

例如主机gcw2

[root@gcw2 conf]# cd /data/zookeeper/zd
[root@gcw2 zd]# clear
[root@gcw2 zd]# vi myid 
[root@gcw2 zd]# cat myid 
2

例如主机gcw3

[root@gcw3 conf]# cd /data/zookeeper/zd/
[root@gcw3 zd]# vi myid
[root@gcw3 zd]# cat myid 
3

5 创建软连接&环境变量

三台主机都需要配置

[root@gcw3 app]# cd /opt/app/
[root@gcw3 app]# ln -s zookeeper-3.4.14/ zookeeper
[root@gcw3 app]# pwd
/opt/app

环境变量 vi /etc/profile

export ZK_HOME=/opt/app/zookeeper
export PATH=$PATH:$ZK_HOME/bin

环境变量生效

[root@gcw2 conf]# source /etc/profile

6 启动测试

启动命令  zkServer.sh start
状态查看  zkServer.sh status

注意：集群启动时至少启动半数以上zk状态才会显示正常，比如我的3台主机，至少须启动2台

[root@gcw2 app]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/app/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@gcw2 app]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/app/zookeeper/bin/../conf/zoo.cfg
Mode: leader