强制检查 chrony 时间

强制检查 chrony 时间

语境:

  • Centos 7.0

  • chronyc (chrony) 版本 3.1 (+READLINE +IPV6 +DEBUG)


问题

我想要找到一种方法来强制 chronyd 立即更改硬件时钟无需等待。

该程序chronyd目前正在我的机器上运行:

[root@localhost ~]# ps -ef | grep chronyd
   chrony     599     1  0 21:59 ?        00:00:00 /usr/sbin/chronyd
   root      6710  4779  0 22:31 pts/0    00:00:00 grep --color=auto chron

chronyd文件中实际上是这样配置的/etc/chrony.conf

   # 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.
   allow 192.168.0.0/16

   # Ignore stratum in source selection.
   stratumweight 0

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

   # Select which information is logged.
   #log measurements statistics tracking
   pool chronos.univ-brest.fr

该机器当前正在询问的 NTP 主机是,chronos.univ-brest.fr并且该机器能够 ping 通它:

 [root@localhost ~]# ping chronos.univ-brest.fr
   PING chronos.univ-brest.fr (195.83.247.18) 56(84) bytes of data.
   64 bytes from chronos.univ-brest.fr (195.83.247.18): icmp_seq=1 ttl=239 time=38.3 ms
   64 bytes from chronos.univ-brest.fr (195.83.247.18): icmp_seq=2 ttl=239 time=38.7 ms

我发现的唯一类似的帖子并没有解决我的问题https://stackoverflow.com/questions/49730407/how-to-resynchronize-with-chrony


机器上的当前日期如下:

[root@localhost ~]# date
   jeu. févr.  2 22:40:21 CET 1978

我想找到一种方法来强制chronyd将硬件时钟立即更改为 NTP 主机给出的日期。

答案1

如果 chronyd 尚未运行,则可以执行类似于“ntpdate pool.ntp.org”的命令(自 1.30 版起):

chronyd -q 'server pool.ntp.org iburst'

如果它已经在运行并且已经配置了一些服务器,则等效操作如下:

chronyc -a 'burst 4/4'

如果您希望 chronyd 在存在较大偏移量的情况下也步进时钟而不是旋转,并且 chrony.conf 不包含无限制的 makestep 指令,那么您还需要等到新的测量完成,然后告诉 chronyd 进行步进:

sleep 10
chronyc -a makestep

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