Overview
A customer reports NTP Sync failures were observed in the nodes and they were using the chrony daemon provided by Linux. Example output reported by customer:
[root@<host_name>~]# 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 [root@<host_name> ~]# [root@<host_name>~]# ntpstat unsynchronised poll interval unknown
Solution
As such this is an OS-level issue and the customer needs to contact RHEL Support. However here are steps to install chrony daemon and verify it:
systemctl status chronyd yum install chronyd systemctl enable -now chronyd systmectl status chronyd chronyc activity chronyc sources chronyc sourcesstats -v
Priyanka Bhotika
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