we are using chrony service in order to sync linux clients to NTP server in our cluster
since we get diff time between machines we enable the chrony logs to understand the reasons that machines in the cluster are with diff time
example of chrony logs
[root@server_2 chrony]# ls
tracking.log
statistics.log
measurements.log
[root@server_2 chrony]#
more tracking.log
==================================================================================================
Date (UTC) Time IP Address St Freq ppm Skew ppm Offset L Co Offset sd Rem. corr.
==================================================================================================
2019-11-02 16:28:29 193.34.2.90 7 3.319 0.413 -3.194e-05 N 1 7.595e-06 -2.451e-08
2019-11-02 16:29:33 193.34.2.90 7 3.280 0.241 -4.739e-06 N 1 7.793e-06 -8.506e-09
2019-11-02 16:30:38 193.34.2.90 7 3.280 0.162 9.378e-07 N 1 7.708e-06 2.806e-06
2019-11-02 16:31:42 193.34.2.90 7 3.279 0.194 -8.777e-05 N 1 2.454e-05 1.565e-06
2019-11-02 16:32:47 193.34.2.90 7 3.276 0.265 -6.126e-05 N 1 1.462e-05 -5.085e-08
2019-11-02 16:33:52 193.34.2.90 7 3.205 0.589 -4.021e-05 N 1 1.390e-05 -6.203e-08
2019-11-02 16:34:56 193.34.2.90 7 2.670 0.777 -4.523e-05 N 1 9.487e-06 -2.635e-09
2019-11-02 16:38:10 193.34.2.90 7 2.547 0.381 -2.507e-05 N 1 1.595e-05 -3.263e-08
2019-11-02 16:39:14 193.34.2.90 7 2.369 0.398 -8.562e-05 N 1 1.637e-05 1.624e-05
2019-11-02 16:40:20 193.34.2.90 7 2.323 0.264 -8.542e-06 N 1 1.498e-05 -9.931e-08
2019-11-02 16:41:25 193.34.2.90 7 2.331 0.240 7.737e-06 N 1 1.872e-05 5.261e-06
2019-11-02 16:42:30 193.34.2.90 7 2.338 0.211 3.433e-06 N 1 1.958e-05 -2.259e-06
2019-11-02 16:44:40 193.34.2.90 7 2.309 0.395 -1.485e-04 N 1 4.641e-05 -3.489e-06
2019-11-02 16:45:44 193.34.2.90 7 2.200 0.760 3.455e-07 N 1 4.970e-05 -1.446e-07
2019-11-02 16:46:50 193.34.2.90 7 2.193 0.951 -3.363e-04 N 1 8.643e-05 -4.877e-07
2019-11-02 16:47:54 193.34.2.90 7 2.183 1.243 -4.516e-04 N 1 1.033e-04 -2.225e-07
2019-11-02 16:48:59 193.34.2.90 7 -0.736 5.314 -5.285e-04 N 1 6.903e-06 -3.506e-07
2019-11-02 16:50:04 193.34.2.90 7 -4.855 0.933 -2.600e-04 N 1 5.356e-06 -5.370e-07
..
more measurements.log
========================================================================================================================
Date (UTC) Time IP Address L St 123 567 ABCD LP RP Score Offset Peer del. Peer disp. Root del. Root disp.
========================================================================================================================
2019-11-02 16:41:25 193.34.2.90 N 6 111 111 1111 6 6 0.48 -1.000e-04 5.220e-04 1.477e-06 5.206e-01 6.248e-01
2019-11-02 16:42:30 193.34.2.90 N 6 111 111 1111 6 6 0.62 -1.400e-05 4.490e-04 1.477e-06 5.206e-01 6.258e-01
2019-11-02 16:43:35 193.34.2.90 N 6 111 111 1101 6 6 0.72 7.440e-04 1.466e-03 1.477e-06 5.206e-01 6.268e-01
2019-11-02 16:44:40 193.34.2.90 N 6 111 111 1111 6 6 0.00 1.770e-04 2.860e-04 1.477e-06 5.206e-01 6.278e-01
2019-11-02 16:45:44 193.34.2.90 N 6 111 111 1111 6 6 0.03 -7.100e-05 5.100e-04 1.478e-06 5.206e-01 6.287e-01
2019-11-02 16:46:50 193.34.2.90 N 6 111 111 1111 6 6 0.00 3.820e-04 2.460e-04 1.477e-06 5.206e-01 6.174e-01
2019-11-02 16:47:54 193.34.2.90 N 6 111 111 1111 6 6 0.00 5.190e-04 2.260e-04 1.484e-06 5.206e-01 6.183e-01
2019-11-02 16:48:59 193.34.2.90 N 6 111 111 1111 6 6 0.00 5.240e-04 2.450e-04 1.488e-06 5.206e-01 6.193e-01
regarding the logs above
what is the important values in the logs that indicate about problem ?
how to know if Crhony service sync meet the standard?
chronyc -n sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 193.34.2.90 6 8 377 97 +20us[ +27us] +/- 1079ms
[root@master02 ~]# chronyc -n tracking
Reference ID : 193.34.2.90 (193.34.2.90)
Stratum : 7
Ref time (UTC) : Sat Nov 2 21:26:29 2019
System time : 6144.669921875 seconds fast of NTP time
Last offset : +0.000007461 seconds
RMS offset : 15.415832520 seconds
Frequency : 32.717 ppm slow
Residual freq : +0.002 ppm
Skew : 0.029 ppm
Root delay : 0.521056 seconds
Root dispersion : 0.796153 seconds
Update interval : 141.3 seconds
Leap status : Normal
