Hadoop（1）搭建zookeeper集群

配置JDK

bash> vim /etc/profile

JAVA_HOME=/opt/jdk-11/
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME CLASSPATH MVN_HOME PATH

bash> source /etc/profile

安装

bash> useradd -r -m -s /bin/bash zookeeper
bash> su – zookeeper
bash> tar zxvf apache-zookeeper-3.7.1-bin.tar.gz
bash> cd apache-zookeeper-3.7.1-bin/conf
bash> cp zoo_sample.cfg zoo.cfg
bash> mkdir -p /home/zookeeper/data
bash> mkdir -p /home/zookeeper/log

配置

1、修改配置文件（所有节点执行）

bash> cd /home/zookeeper/apache-zookeeper-3.7.1-bin/conf
bash> cp zoo_sample.cfg zoo.cfg
bash> vim /home/zookeeper/apache-zookeeper-3.7.1-bin/conf/zoo.cfg

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/home/zookeeper/data
dataLogDir=/home/zookeeper/log
clientPort=2181
server.1=192.168.3.51:2888:3888
server.2=192.168.3.52:2888:3888
server.3=192.168.3.53:2888:3888
server.4=192.168.3.54:2888:3888
server.5=192.168.3.55:2888:3888

2、配置myid

sever1：192.168.3.51

echo 1 > /home/zookeeper/data/myid

sever1：192.168.3.52

echo 2 > /home/zookeeper/data/myid

sever1：192.168.3.53

echo 3 > /home/zookeeper/data/myid

sever1：192.168.3.54

echo 4 > /home/zookeeper/data/myid

sever1：192.168.3.55

echo 5 > /home/zookeeper/data/myid

启动

/home/zookeeper/apache-zookeeper-3.7.1-bin/bin/zkServer.sh start

测试集群

/home/zookeeper/apache-zookeeper-3.7.1-bin/bin/zkServer.sh status

配置systemd

bash> vim /lib/systemd/system/zookeeper.service

[Unit]
Description=zookeeper.service
After=network.target

[Service]
Type=forking
Environment=JAVA_HOME=/opt/jdk-11
ExecStart=/home/zookeeper/apache-zookeeper-3.7.1-bin/bin/zkServer.sh start
ExecStop=/home/zookeeper/apache-zookeeper-3.7.1-bin/bin/zkServer.sh stop
ExecReload=/home/zookeeper/apache-zookeeper-3.7.1-bin/bin/zkServer.sh restart

User=zookeeper
[Install]
WantedBy=multi-user.target

bash> systemctl enable zookeeper
bash> systemctl start zookeeper
bash> systemctl status zookeeper