chrony
同期出来ているパターン [#o6bf2c56]
$ chronyc tracking
Reference ID : 210.173.160.27(ntp1.jst.mfeed.ad.jp)
Stratum : 2
Ref time (UTC) : Fri Jul 8 03:25:24 2016
System time : 0.000037775 seconds fast of NTP time
Last offset : +0.000094745 seconds
RMS offset : 0.000035295 seconds
Frequency : 0.008 ppm fast
Residual freq : +0.012 ppm
Skew : 0.012 ppm
Root delay : 0.002210 seconds
Root dispersion : 0.000309 seconds
Update interval : 1024.2 seconds
Leap status : Normal
$ chronyc sources
210 Number of sources = 4
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* ntp1.jst.mfeed.ad.jp 2 10 377 784 -308us[ -213us] +/- 64ms
^- ntp2.jst.mfeed.ad.jp 2 10 377 556 -462us[ -462us] +/- 82ms
^- ntp3.jst.mfeed.ad.jp 2 10 377 292 -1293us[-1293us] +/- 122ms
同期できてないパターン [#ne20b377]
$ chronyc tracking
Reference ID : 0.0.0.0 ()
Stratum : 0
Ref time (UTC) : Thu Jan 1 00:00:00 1970
System time : 0.000000064 seconds fast of NTP time
Last offset : +0.000000000 seconds
RMS offset : 0.000000000 seconds
Frequency : 3.835 ppm fast
Residual freq : +0.000 ppm
Skew : 0.000 ppm
Root delay : 0.000000 seconds
Root dispersion : 0.000000 seconds
Update interval : 0.0 seconds
Leap status : Not synchronised
$ chronyc sources
210 Number of sources = 4
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^? ntp1.jst.mfeed.ad.jp 0 10 0 10y +0ns[ +0ns] +/- 0ns
^? ntp2.jst.mfeed.ad.jp 0 10 0 10y +0ns[ +0ns] +/- 0ns
^? ntp3.jst.mfeed.ad.jp 0 10 0 10y +0ns[ +0ns] +/- 0ns
↑?だと同期ができていない
強制同期 [#zb5b26f3]
$ sudo chronyc -a makestep
200 OK
200 OK
ntpdateコマンドがある場合は、ntpdate NTPサーバーのアドレス でもOK