所有节点配置NTP服务

主节点：

打开vim /etc/ntp.conf文件

  For more information about this file, see the man pages
 # ntp.conf(), ntp_acc(), ntp_auth(), ntp_clock(), ntp_misc(), ntp_mon().

 driftfile /var/lib/ntp/drift

 # Permit time synchronization with our time source, but do not
 # permit the source to query or modify the service on this system.
 restrict default kod nomodify notrap nopeer noquery
 #restrict - default kod nomodify notrap nopeer noquery

 # Permit all access over the loopback interface.  This could
 # be tightened as well, but to do so would effect some of
 # the administrative functions.
 restrict 192.168.133.131 nomodify notrap nopeer noquery #该节点的IP地址
 restrict 127.0.0.1
 restrict - ::

 # Hosts on local network are less restricted.
 restrict 192.168.133.2 mask 255.255.255.0 nomodify notrap #网关和子网掩码

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

 server  127.127.1.0
 fudge   127.127.1.0 stratum 

从节点

vim vim /etc/ntp.conf

 # For more information about this file, see the man pages
 # ntp.conf(), ntp_acc(), ntp_auth(), ntp_clock(), ntp_misc(), ntp_mon().

 driftfile /var/lib/ntp/drift

 # Permit time synchronization with our time source, but do not
 # permit the source to query or modify the service on this system.
 restrict default  nomodify notrap nopeer noquery
 #restrict - default kod nomodify notrap nopeer noquery

 # Permit all access over the loopback interface.  This could
 # be tightened as well, but to do so would effect some of
 # the administrative functions.

 restrict 192.168.133.129  nomodify notrap nopeer noquery#该节点IP地址
 restrict 127.0.0.1
 restrict - ::

 # Hosts on local network are less restricted.
 restrict 192.168.133.2 mask 255.255.255.0 nomodify notrap

 #server .rhel.pool.ntp.org iburst
 #server .rhel.pool.ntp.org iburst
 server 192.168.133.136 #主机IP地址
 fudge 192.168.133.136 stratum