Shell脚本实现自动安装zookeeper

根据配置修改最后一行:

install_zookeeper "2181" "192.168.122.201" "192.168.122.202" "192.168.122.203"

注意：需要把zk-cluster的每台机器上的防火墙停掉，再启动zookeeper:

$ /usr/lib/zookeeper/bin/zkServer.sh start-foreground