Check manual page of chrony
NTP time synchronization using chrony
This check uses the output of chronyc tracking in order to
check the time synchronization when using chrony. The check
is very similar to ntp, which monitors the ntpd, but it
does not support jitter.
You can set levels for the maximum stratum and for the time offset
in milliseconds. The configuration is compatible with ntp.
When chrony is not found running, the check goes to CRIT.
If chrony is running, then one service is being created.