局域网内不同linux主机间时间同步

• 使用chrony服务
• • 1、服务端
  • • • 1.1修改配置文件
      • • • 1.2 重启chronyd服务
  • 2 客户端
  • • • 2.1 修改配置文件
      • • • 2.2 重启chronyd服务
  • 3.客户端定时重启chronyd服务来实现同步

摘要：使用其中一台作为服务器主机，其他主机作为客户端，使用crontab定时任务来实现定期自动同步时间为主机时间。

vim  /etc/chrony.conf

# 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
#主机Ip 当前IP
server 192.168.10.17 iburst
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

# Allow the system clock to be stepped in the first three updates
# if its offset is larger than 1 second.
makestep 1.0 3

# Enable kernel synchronization of the real-time clock (RTC).
rtcsync

# Enable hardware timestamping on all interfaces that support it.
#hwtimestamp *

# Increase the minimum number of selectable sources required to adjust
# the system clock.
#minsources 2

# Allow NTP client access from local network.
#表示允许谁去同步我的时间
allow 192.168.10.1/16

# Serve time even if not synchronized to a time source.
#不去同步任何人的时间
local stratum 10

# Specify file containing keys for NTP authentication.
#keyfile /etc/chrony.keys

# Specify directory for log files.
logdir /var/log/chrony

systemctl restart chronyd

vim  /etc/chrony.conf

# 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
#同步主机的时间
server 193.168.10.17 iburst
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

# Allow the system clock to be stepped in the first three updates
# if its offset is larger than 1 second.
makestep 1.0 3

systemctl restart chronyd

crontab -e

客户端每天0点自动同步主机时间

0 0 * * * systemctl restart chronyd