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Check NTPd output for minimum number of servers, reach, and at least one selected time server.
Current Version
2.2
Last Release Date
2015-07-11
Owner
Tim
Website
https://github.com/leprasmurf/Scripts/blob/master/check_ntpd.pl
License
Apache
This nagios check determines the health of NTPd on a system by calculating the overall health of the peers associated with the daemon. This check also verifies other attributes, such as the number of peers available, and whether a peer has been selected to be the sync source. The overall health percentage is a cumulative average of the reach over the peers.
Example: If 3 peers are listed, and 1 of the 3 dropped 2 of the last 8 packets, the health of that peer would be 75%, and the overall health would be about 92% ((100 + 100 + 75) / 3).
Available Options: --critical|-c <num> -Set the critical threshold for overall health (default:50) --warning|-w <num> -Set the warning threshold for overall health (default:75) --peer_critical <num> -Set the critical threshold for number of peers (default:1) --peer_warning <num> -Set the warning threshold for number of peers (default:2) --help|-h -display this help
As described in the nagios guidlines (https://nagios-plugins.org/doc/guidelines.html#PLUGOUTPUT), pipe characters should only be used when defining performance data. Otherwise, it brakes the performance data and also the UI. In this case, at line 146, I have replaced the "|" caracter with "/".
So far we have run across several of our servers that for whatever reason, never correctly connected with their NTP servers. The result was that ntpq -p returned "No Association" as its result which created a false positive since this script didn't recognize the failure case. Added at line 36: } elsif($server_list[$i] =~ /^No association/) { splice(@server_list, $i, 1); $i--; to deal with this edge case
Thanks! I've updated the plugin as you've suggested.
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