yum -y install ntp
服务器端
[root@ip-172-31-6-148~]# vim /etc/ntp.conf
...
# Use public servers from thepool.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
server 127.127.1.0 #local clock
fudge 127.127.1.0 stratum 10
客户端节点
vim /etc/ntp.conf
server 172.31.6.148 iburst
==================
[root@ip-172-31-6-148~]# ntpq -p
remote refid stt when poll reach delay offset jitter
==============================================================================
*LOCAL(0) .LOCL. 10 l 15 64 7 0.000 0.000 0.001
[root@ip-172-31-6-148 ~]# ssh -i fayson.pem.txtip-172-31-5-190.fayson.com "ntpq-p"
remote refid st t when pollreach delay offset jitter
==============================================================================
*ip-172-31-6-148 LOCAL(0) 11 u 68 128 377 0.274 1.005 0.243
[root@ip-172-31-6-148 ~]# ssh -i fayson.pem.txtip-172-31-10-118.fayson.com "ntpq-p"
remote refid stt when poll reach delay offset jitter
==============================================================================
*ip-172-31-6-148 LOCAL(0) 11 u 75 128 377 0.285 1.214 0.213
[root@ip-172-31-6-148 ~]# ssh -i fayson.pem.txt ip-172-31-9-33.fayson.com"ntpq -p"
remote refid stt when poll reach delay offset jitter
==============================================================================
*ip-172-31-6-148 LOCAL(0) 11 u 1 64 367 0.294 -9.249 1.511
注：标记部分，有“*”显示则表示同步成功。