CentOS7的Hadoop集群配置时间同步

[root@master hadoop]# vim /etc/ntp.conf

...前文省略..
# Hosts on local network are less restricted.

restrict 192.168.10.0 mask 255.255.255.0 nomodify notrap

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
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

..前文省略..
disable monitor

server  127.127.1.0
fudge  127.127.1.0 stratum 10

[root@master hadoop]# vim /etc/sysconfig/ntpd

# Command line options for ntpd
OPTIONS="-g"
SYNC_HWCLOCK=yes

~                                                                                                                                                                         
~              
[root@master hadoop]# service ntpd restart
Redirecting to /bin/systemctl restart ntpd.service



                                ```
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从机
<details>
<summary>点击查看代码</summary>

[root@clone1 ~]# cd hadoop*
[root@clone1 hadoop-3.4.0]# crontab -e
*/1 * * * * /usr/sbin/ntpdate master // 分钟

crontab: installing new crontab
您在 /var/spool/mail/root 中有新邮件

</details>