Download Zookeeper

Extract file

Put this file on at least 2 machines

Open conf/zoo.cfg

Select your data directory

dataDir=/yourSelectedDirectory

List the whole Zookeeper cluster with this scheme : server.numberOfServer=ip

server.1=123.456.789.01:2888:5888
server.2=456.789.123.02:2888:5888
server.3=789.123.456.03:2888:5888
[...]

On each machine respect the same numberOfServer with the same ip.

Start Zookeeper

bin/zkServer.sh start

Check if Zookeeper is runing

bin/zkServer.sh status

It is running if we can see

JMX enabled by default
Using config: ZOOKEEPER_HOME/bin/../conf/zoo.cfg
Mode: follower

Or

JMX enabled by default
Using config: ZOOKEEPER_HOME/bin/../conf/zoo.cfg
Mode: leader

Verify that numberOfServer matches the selected ip. Go to /yourSelectedDirectory and open myid on each machine.

One the first machine (server.1=123.456.789.01:2888:5888 on the example), we have to see on myid : 1

One the second machine (server.2=456.789.123.02:2888:5888 on the example), we have to see on myid : 2

Etc.

Leader and Followers

On the Zookeeper cluster, we must have only one Leader and many Followers.