HADOOP ntp时区同步

安装ntp服务器
sudo yum install ntp
启动
systemctl start ntpd
开机自启动
systemctl enable ntpd
查看状态
systemctl status ntpd
时钟同步
ntpdate -u ntp.aliyun.com

cp /etc/ntp.conf /etc/ntp.conf.backup

sudo vi /etc/ntp.conf
hadoop 主节点(hostname=hadoop01)

server ntp.aliyun.com prefer

#server 0.centos.pool.ntp.org iburst
#server 1.centos.pool.ntp.org iburst
#server 2.centos.pool.ntp.org iburst
#server 3.centos.pool.ntp.org iburst

hadoop 副节点

server hadoop01

#server 0.centos.pool.ntp.org iburst
#server 1.centos.pool.ntp.org iburst
#server 2.centos.pool.ntp.org iburst
#server 3.centos.pool.ntp.org iburst

如果没有配置hosts文件，用主节点ip地址（例如192.168.1.128是自己的ip地址）代替hadoop01
ip addr 可以查看ip地址

systemctl restart ntpd
hadoop 主节点
ntpdate -u ntp.aliyun.com
hadoop 副节点
ntpdate -u hadoop01

date查看时间