1. apt install -y chrony
  2. 查询当前时间服务器列表：chronyc -n sources -v
    root@Kube-Node2:~# chronyc -n sources -v

      .-- Source mode  '^' = server, '=' = peer, '#' = local clock.
     / .- Source state '*' = current best, '+' = combined, '-' = not combined,
    | /             'x' = may be in error, '~' = too variable, '?' = unusable.
    ||                                                 .- xxxx [ yyyy ] +/- zzzz
    ||      Reachability register (octal) -.           |  xxxx = adjusted offset,
    ||      Log2(Polling interval) --.      |          |  yyyy = measured offset,
    ||                                \     |          |  zzzz = estimated error.
    ||                                 |    |           \
    MS Name/IP address         Stratum Poll Reach LastRx Last sample               
    ===============================================================================
    ^? 91.189.94.4                   2   6     3     3    -33ms[  -33ms] +/-  289ms
    ^- 91.189.91.157                 2   6    77     4    -92ms[  -92ms] +/-  313ms
    ^- 185.125.190.57                2   6   137     3    -35ms[  -35ms] +/-  184ms
    ^- 185.125.190.58                2   6    77     3    -35ms[  -35ms] +/-  189ms
    ^+ 162.159.200.123               3   6    77     7  +1963us[+1710us] +/-  146ms
    ^+ 178.215.228.24                2   6    77     3    -90ms[  -90ms] +/-  233ms
    ^- 119.28.128.246                2   6    77     5  -4033us[-4033us] +/-   95ms
    ^* 118.143.17.83                 2   6    77     6   -499us[ -754us] +/-   79ms
  3. 查询本地时间列表：chronyc tracking
    root@Kube-Node2:~# chronyc tracking
    Reference ID    : 768F1153 (static-dia-83-17.143.118-on-nets.com)
    Stratum         : 3
    Ref time (UTC)  : Mon Sep 12 11:42:49 2022
    System time     : 0.003299957 seconds slow of NTP time
    Last offset     : -0.002819499 seconds
    RMS offset      : 0.002819499 seconds
    Frequency       : 6.147 ppm slow
    Residual freq   : -0.737 ppm
    Skew            : 41.831 ppm
    Root delay      : 0.153409138 seconds
    Root dispersion : 0.003587042 seconds
    Update interval : 64.3 seconds
    Leap status     : Normal
  4. 验证时间是否同步：data