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Check manual page of ntp.time

Checkmk Manual

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NTP time synchronization using ntpd

Distribution: official part of Check_MK
License: GPL
Supported Agents: Linux

This check uses the output of ntpq -p as sent by the agent in order to check the quality of the NTP time synchronization of the client. If more than one peer is available, NTP chooses the "best" of them as "system peer". This check only measures the time difference to that system peer.

The check is CRIT or WARN, if the time supplied by the system peer is not good enough (see below for parameters). It is UNKNOWN if no system peer is present or the system peer is unreachable.

The check is CRIT, when there are NTP peers reachable but non of those is used by the NTP daemon. That is the case if the time provided by those peers is too bad.

Note: If you want to check the health of the peers, you might want to use ntp, which creates one individual check per NTP peer.

Discovery

If at least one peer is present, exactly one check is created, if ntp_inventory_mode is set to "summary" or "both".