大数据必知必会：Zookeeper（1）单机环境安装

sudo apt-get update

sudo apt-get install -y openjdk-8-jdk

vi .bashrc

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

source .bashrc

wget https://dlcdn.apache.org/zookeeper/zookeeper-3.8.0/apache-zookeeper-3.8.0-bin.tar.gz

mkdir -p apps
tar -xzf apache-zookeeper-3.8.0-bin.tar.gz -C apps

cp apps/apache-zookeeper-3.8.0-bin/conf/zoo_sample.cfg apps/apache-zookeeper-3.8.0-bin/conf/zoo.cfg

vi apps/apache-zookeeper-3.8.0-bin/conf/zoo.cfg

# The number of milliseconds of each tick
# 通信心跳时间，Zookeeper服务器与客户端心跳时间，单位毫秒。
tickTime=2000

# The number of ticks that the initial 
# synchronization phase can take
# LF初始通信时限
# Leader和Follower初始连接时能容忍的最多心跳数，单位次（即tickTime的数量）
initLimit=10

# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
# LF同步通信时限
# Leader和Follower连接之后，通信时能容忍的最多心跳数，单位次
# 时间如果超过syncLimit * tickTime，Leader认为Follwer挂掉，从服务器列表中删除Follwer
syncLimit=5

# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
# Zookeeper数据存放目录
dataDir=/home/wux_labs/data/zookeeper

# the port at which the clients will connect
# 客户端连接端口，通常不做修改
clientPort=2181

# Zookeeper数据存放目录
dataDir=/home/wux_labs/data/zookeeper
# 客户端连接端口
clientPort=2181

mkdir -p /home/wux_labs/data/zookeeper

cd apps/apache-zookeeper-3.8.0-bin

bin/zkServer.sh start

bin/zkServer.sh status

bin/zkServer.sh stop