[root@testing ~]# cat /etc/chrony.conf 

server ntp.myhuaweicloud.com minpoll 4 maxpoll 10 iburst

# Ignore stratum in source selection.
stratumweight 0.05

# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

# Enable kernel RTC synchronization.
rtcsync

# In first three updates step the system clock instead of slew
# if the adjustment is larger than 10 seconds.
makestep 10 3

# Allow NTP client access from local network.
#allow 192.168/16

# Listen for commands only on localhost.
bindcmdaddress 127.0.0.1
bindcmdaddress ::1

# Serve time even if not synchronized to any NTP server.
#local stratum 10

# Disable logging of client accesses.
noclientlog

# Send a message to syslog if a clock adjustment is larger than 0.5 seconds.
logchange 0.5

logdir /var/log/chrony
#log measurements statistics tracking			
			
			

查看同步时间服务器列表

			
[root@localhost ~]# chronyc sources
MS Name/IP address         Stratum Poll Reach LastRx Last sample               
===============================================================================
^- a.chl.la                      2   8   372   643    -30ms[  -28ms] +/-  143ms
^- ntp1.flashdance.cx            2   8   177   455  +1760us[+3207us] +/-  166ms
^* 203.107.6.88                  2   9   377   193  +2478us[+3976us] +/-   27ms
^- ntp8.flashdance.cx            2   8   135   445  -8210us[-6856us] +/-  183ms		
			
			

			
[root@testing ~]# chronyc sourcestats -v
                             .- Number of sample points in measurement set.
                            /    .- Number of residual runs with same sign.
                           |    /    .- Length of measurement set (time).
                           |   |    /      .- Est. clock freq error (ppm).
                           |   |   |      /           .- Est. error in freq.
                           |   |   |     |           /         .- Est. offset.
                           |   |   |     |          |          |   On the -.
                           |   |   |     |          |          |   samples. \
                           |   |   |     |          |          |             |
Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
==============================================================================			
			
			

			
[root@testing ~]# chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000000 seconds fast of NTP time
Last offset     : +0.000000000 seconds
RMS offset      : 0.000000000 seconds
Frequency       : 0.000 ppm slow
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 0.0 seconds
Leap status     : Not synchronised			
			
			

查看同步状态

			
[root@localhost ~]# chronyc tracking
Reference ID    : CB6B0658 (203.107.6.88)
Stratum         : 3
Ref time (UTC)  : Tue Jul 13 08:39:57 2021
System time     : 0.000333415 seconds fast of NTP time
Last offset     : +0.001497547 seconds
RMS offset      : 0.000643134 seconds
Frequency       : 9.239 ppm fast
Residual freq   : +0.134 ppm
Skew            : 1.942 ppm
Root delay      : 0.053295419 seconds
Root dispersion : 0.001933562 seconds
Update interval : 256.4 seconds
Leap status     : Normal		
			
			

			
[root@testing ~]# chronyc -a makestep 
200 OK