Zookeeper installation and cluster construction (1) Zookeeper stand-alone installation

Introduction to Zookeeper

ZooKeeper is a distributed , open source distributed application coordination service, which provides functions including configuration maintenance, domain name service, distributed synchronization, group service, etc.

Single machine installation of Zookeeper

Preparation before installation

• Host planning, I use a virtual machine to install a centOS7 version of the system.
• Install JDK1.8 and above

Download Zookeeper

Official address: http://zookeeper.apache.org/

Download path: https://www.apache.org/dyn/closer.cgi/zookeeper/

The version I currently download is 3.4.14

Upload the downloaded installation package to the system

First create the app directory under /usr/local/

cd /usr/local/

mkdir app

cd app

Upload the zookeeper installation package to the app directory

rz command to select the installation package to upload

Install Zookeeper

• Unzip apache-zookeeper-3.4.14.tar.gz 

tar -xvf zookeeper-3.4.14.tar.gz

• Create soft connection

 ln -s zookeeper-3.4.14/ zookeeper

• Configure environment variables

vi etc/profile

Add the following content

export ZK_HOME=/usr/local/app/zookeeper

export PATH =$ZK_HOME/bin:$PATH

source /etc/profile

• Modify the zoo.cfg configuration file

cd /usr/local/app/zookeeper/conf

• Copy the zoo.cfg file

cp zoo_sample.cfg zoo.cfg

vi zoo.cfg

 Modify the following content:

#修改数据目录

dataDir=/usr/data/zookeeper

• Save the file

Note: If the data directory is not created, create the directory first

mkdir /usr/data/zookeepre -p

 

• Start Zookeeper

zkServer.sh start

 

• Check Zookeeper status

./zkServer.sh status

The following content is displayed: 

ZooKeeper JMX enabled by default

Using config: /usr/local/app/zookeeper/bin/../conf/zoo.cfg

Mode: standalone

1. View process

ps -ef | grep zookeeper

The above steps complete the Zookeeper stand-alone installation.