Am 2013-08-01 09:58, schrieb James Patterson:
> Hello,
>
> I have two questions.
>
> What's the best way
> of asking ntpd if it is receiving time from a good time source?
You remind me that I should start to monitor our timeservers better (2
of which are in the pool).
Our main monitoring tool is Icinga (a Nagios fork), and it comes with
several ntp related plugins.
check_ntp_peer seems to be apropriate, see attached help text.
I hope I don't break any list rules by attaching something, sorry otherwise.
Does anybody have experience using check_ntp_peer and can recommend
apropriate jitter margins for, say level 3 to 5 time servers?
Thanks,
Regards,
Christoph
check_ntp_peer v1.4.16 (nagios-plugins 1.4.16)
Copyright (c) 2006 Sean Finney
Copyright (c) 2006-2008 Nagios Plugin Development Team
<[email protected]>
This plugin checks the selected ntp server
Usage:
check_ntp_peer -H <host> [-w <warn>] [-c <crit>] [-W <warn>] [-C <crit>]
[-j <warn>] [-k <crit>] [-v verbose]
Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
-H, --hostname=ADDRESS
Host name, IP Address, or unix socket (must be an absolute path)
-p, --port=INTEGER
Port number (default: 123)
-q, --quiet
Returns UNKNOWN instead of CRITICAL or WARNING if server isn't synchronized
-w, --warning=THRESHOLD
Offset to result in warning status (seconds)
-c, --critical=THRESHOLD
Offset to result in critical status (seconds)
-W, --swarn=THRESHOLD
Warning threshold for stratum
-C, --scrit=THRESHOLD
Critical threshold for stratum
-j, --jwarn=THRESHOLD
Warning threshold for jitter
-k, --jcrit=THRESHOLD
Critical threshold for jitter
-m, --twarn=THRESHOLD
Warning threshold for number of usable time sources ("truechimers")
-n, --tcrit=THRESHOLD
Critical threshold for number of usable time sources ("truechimers")
-t, --timeout=INTEGER
Seconds before connection times out (default: 10)
-v, --verbose
Show details for command-line debugging (Nagios may truncate output)
This plugin checks an NTP server independent of any commandline
programs or external libraries.
Notes:
Use this plugin to check the health of an NTP server. It supports
checking the offset with the sync peer, the jitter and stratum. This
plugin will not check the clock offset between the local host and NTP
server; please use check_ntp_time for that purpose.
See:
http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT
for THRESHOLD format and examples.
Examples:
Simple NTP server check:
./check_ntp_peer -H ntpserv -w 0.5 -c 1
Check jitter too, avoiding critical notifications if jitter isn't available
(See Notes above for more details on thresholds formats):
./check_ntp_peer -H ntpserv -w 0.5 -c 1 -j -1:100 -k -1:200
Only check the number of usable time sources ("truechimers"):
./check_ntp_peer -H ntpserv -m :5 -n :3
Check only stratum:
./check_ntp_peer -H ntpserv -W 4 -C 6
Send email to [email protected] if you have questions
regarding use of this software. To submit patches or suggest improvements,
send email to [email protected]
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