# Use public servers from the pool.ntp.org project. # Please consider joining the pool (http://www.pool.ntp.org/join.html).
# NTP服务器地址。server可以配置多个，这里配了阿里云、腾讯云、一个私人ntp和中科院的ntp服务器，实际测试中中科院的ntp服务器最慢 server ntp.aliyun.com iburst
server ntp1.aliyun.com iburst server time1.cloud.tencent.com iburst
server time3.cloud.tencent.com iburst
server cn.ntp.org.cn iburst server ntp.ntsc.ac.cn 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.
# 允许连接到此服务器同步时间的网段；0.0.0.0/0表示允许所有网段；注释该配置此服务就只能作为NTP客户端，不能作为服务器 allow 0.0.0.0/0 # Serve time even if not synchronized to a time source.
# 当配置的server不可用时，是否使用本地时间同步到客户端 local stratum 10 # Specify file containing keys for NTP authentication. #keyfile /etc/chrony.keys # Get TAI-UTC offset and leap seconds from the system tz database. #leapsectz right/UTC # Specify directory for log files. logdir /var/log/chrony # Select which information is logged. #log measurements statistics tracking#和服务器相差多少秒内才执行同步。本地时间和服务器时间相差的秒数超过这个时间就不会同步。默认是3秒
maxdistance 94608000.0
timedatectl set-timezone 'Asia/Shanghai' #将时区改为亚洲上海 timedatectl set-ntp true # 启动ntp服务 systemctl restart chronyd #启动chronyd 服务 systemctl enable chronyd #将chronyd 设置为开机启动 chronyc -a makestep #手动同步一次时间
firewall-cmd --add-service=ntp --permanent firewall-cmd --reload
chronyc sources -v #查看时间同步状态 ntp_servers chronyc sourcestats -v #查看 ntp_servers 状态 chronyc tracking -v #查看 ntp 详细信息 chronyc -a makestep #强制同步下系统时钟
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