Centos8 单机配置 Zookeeper3.6.3 集群

安装 Zookeeper 3.6.3

前提

已经安装好 JDK8+. 如果使用JDK8, 版本需要在211以上.

下载, 解压

使用root用户

wget https://downloads.apache.org/zookeeper/stable/apache-zookeeper-3.6.3-bin.tar.gz
tar xvf apache-zookeeper-3.6.3-bin.tar.gz 
cd /opt/
ll
mkdir zookeeper
cd zookeeper/
mv ~/backup/apache-zookeeper-3.6.3-bin .
# 命名加 -1 , 因为后面还有两个节点
mv apache-zookeeper-3.6.3-bin/ apache-zookeeper-3.6.3-bin-1

修改配置

使用root用户

cd apache-zookeeper-3.6.3-bin-1/conf
cp zoo_sample.cfg zoo.cfg
vi zoo.cfg 
# 增加环境变量配置
vi zookeeper-env.sh
chmod +x zookeeper-env.sh 
# 产生另外两个节点
cd /opt/zookeeper
cp -r apache-zookeeper-3.6.3-bin-1/ apache-zookeeper-3.6.3-bin-2
cp -r apache-zookeeper-3.6.3-bin-1/ apache-zookeeper-3.6.3-bin-3
# 修改另外两个节点配置
vi apache-zookeeper-3.6.3-bin-2/conf/zoo.cfg 
vi apache-zookeeper-3.6.3-bin-3/conf/zoo.cfg 
vi apache-zookeeper-3.6.3-bin-2/conf/zookeeper-env.sh 
vi apache-zookeeper-3.6.3-bin-3/conf/zookeeper-env.sh 

对于每个节点的zoo.cfg, 需要修改以下几处

dataDir=/home/tomcat/zookeeper/data1 #修改, 各节点分别为data1, data2, data3
clientPort=2181 #修改, 各节点分别为 2181, 2182, 2183
...
autopurge.purgeInterval=1 #取消注释

server.1=127.0.0.1:10090:10091 #新增 各节点都是这三行
server.2=127.0.0.1:10092:10093 #新增
server.3=127.0.0.1:10094:10095 #新增

对于每个节点的 zookeeper-env.sh , 需要增加这两行

JAVA_HOME=/opt/jdk/latest #因为没有设置全局JAVA_HOME,需要在这里配置
ZOO_LOG_DIR=/home/tomcat/zookeeper/log1 #各节点分别为 log1, log2, log3

关于zookeeper-env.sh
这个文件会在zkEnv.sh中调用, 在检查zoo.cfg文件是否存在之前就会执行, 此时可以设置任何你想设置的环境变量

if [ -f "${ZOOCFGDIR}/zookeeper-env.sh" ]; then
  . "${ZOOCFGDIR}/zookeeper-env.sh"
fi

创建工作区

使用 tomcat 用户

cd
mkdir zookeeper
cd zookeeper/
# 创建工作目录
mkdir data1
mkdir data2
mkdir data3
# 接入节点ID
echo "1" > data1/myid
echo "2" > data2/myid
echo "3" > data3/myid
# 创建日志目录
mkdir log1
mkdir log2
mkdir log3
# 创建启动脚本
vi startup.sh
chmod u+x startup.sh 
# 创建关闭脚本
vi shutdown.sh 
chmod u+x shutdown.sh 

启动脚本 zookeeper/startup.sh 的内容

/opt/zookeeper/apache-zookeeper-3.6.3-bin-1/bin/zkServer.sh start
/opt/zookeeper/apache-zookeeper-3.6.3-bin-2/bin/zkServer.sh start
/opt/zookeeper/apache-zookeeper-3.6.3-bin-3/bin/zkServer.sh start

关闭脚本 zookeeper/shudown.sh 的内容

/opt/zookeeper/apache-zookeeper-3.6.3-bin-1/bin/zkServer.sh stop
/opt/zookeeper/apache-zookeeper-3.6.3-bin-2/bin/zkServer.sh stop
/opt/zookeeper/apache-zookeeper-3.6.3-bin-3/bin/zkServer.sh stop