centos7上搭建zookeeper集群

1.下载zookeeper

http://www.apache.org/dyn/closer.cgi/zookeeper/  可以登录这个网站下载，然后上传到 centos上

   修改成自己需要的版本 ，建议登录上上面的网站看看选择合适的版本

此处，我构建根目录下一个专门放安装软件的目录 /software 

cd /software 
sudo wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz

2.  解压 

tar -zxvf  zookeeper-3.4.14.tar.gz

3.复制配置文件名称

cd zookeeper-3.4.14/conf/
cp  zoo_sample.cfg   zoo.cfg

4.修改配置文件

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=/sortware/data/zookeeper #修改数据存放位置
# the port at which the clients will connect
dataLogDir=/sortware/log/zookeeper #修改日志存放位置
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
#增加集群信息
server.1=node1:2888:3888
server.2=node2:2888:3888
server.3=node3:2888:3888

wq! 保存退出

5.设置每个节点的id

在zoo.cfg中对应的   dataDir 目录下执行

echo 1 > myid    注意myid要一摸一样  1这个对应  zoo.cfg 中 集群信息  server.1

6.复制整个software目录到其他节点上

scp -r /software node2:/

scp -r /software node3:/

然后分别修改node2上的  echo 2 > myid，node3上的  echo 3 > myid

备注：我事先在/etc/hosts 里增加每个节点映射到域名，node1,node2,node3,如果你没有设置，所有主机名要改成ip地址。

7.关闭防火墙

systemctl stop firewalld.service #停止firewall

systemctl disable firewalld.service #禁止firewall开机启动

firewall-cmd --state #查看默认防火墙状态（关闭后显示notrunning，开启后显示running）

8.把zk目录添加到环境变量

export ZOOKEEPER_HOME=//software/zookeeper-3.4.14/
export PATH=$ZOOKEEPER_HOME/bin:$PATH
export PATH

8.启动zk集群，

zookeeper-3.4.14至少启动3台节点，集群才能正常运行，一般zk集群搭建奇数节点数

zkServer.sh start

9.查看zk运行状态

[root@node2 zookeeper]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: //software/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: leader

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