ZooKeeper Version: 3.4.5
I environment: a virtual machine to install three Linux workstation
host names are: hadoop / hadoop01 / hadoop02
the JDK version: 1.7
1: Unzip
tar -zxvf zookeeper-3.4.5.tar.gz（解压）
2: rename
mv zookeeper-3.4.5 zookeeper（重命名文件夹zookeeper-3.4.5为zookeeper）
3: Modify environment variables
vim /etc/profile(修改文件)
4: Recompile the modified configuration file to make it effective
source /etc/profile
Note: The above three zookeepers need to be modified
Next is the configuration and modification of the ZooKeeper environment
cd zookeeper/conf
cp zoo_sample.cfg zoo.cfg , (zoo.cfg is the actual loading configuration file)
vi zoo.cfg
Add content
1. dataDir=/home/hadoop/zookeeper/data --注意其他主机路径是否一致
2. dataLogDir=/home/hadoop/zookeeper/log --注意其他主机路径是否一致
3. server.1=hadoop:2888:3888 (主机名, 心跳端口、数据端口)
4. server.2=hadoop01:2888:3888
5. server.3=hadoop02:2888:3888Create folder
cd /home/hadoop/zookeeper/
mkdir -m 755 data
mkdir -m 755 log
Create a new myid file in the data folder. The content of the myid file is:
cd data
vi myid
Added content: 1
Distribute the cluster to other machines:
scp -r /home/hadoop/zookeeper hadoop@hadoop01:/home/hadoop/
scp -r /home/hadoop/zookeeper hadoop@hadoop02:/home/hadoop/
Modify the configuration files of other machines
到hadoop01上：修改myid为：2
到hadoop02上：修改myid为：3
So far, ZooKeeper has been installed and configured!
Before starting ZooKeeper, you need to do some configuration of the firewall, otherwise it will cause startup failure.
Take iptables as an example: the following is a success:
直接修改配置文件:
vi /etc/sysconfig/iptables @添加一下三行
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2181 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2888 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3888 -j ACCEPT
或者对指定端口做临时修改(重启之后失效,此种方式不许重启防火墙.)
iptables -I INPUT -p tcp --dport 2181 -j ACCEPT
iptables -I INPUT -p tcp --dport 2888 -j ACCEPT
iptables -I INPUT -p tcp --dport 3888 -j ACCEPT
重启防火墙:
service iptables restart
查看防火墙端口状态：
service iptables status
Then you can start ZooKeeper and
enter the zookeeper directory: zkServer.sh start
View process: jps (QuorumPeerMain is the zookeeper process)