[Nagiosplug-devel] check_ntp Bug
Michael Klöffer
mkloeffer at tycoint.com
Wed Nov 27 04:16:02 CET 2002
Hi,
I just discovered a bug in check_ntp (not mainly, but...).
check_ntp uses ntpdc to detect time differences on a host.
When using ntpdc from a linux host against a OpenBSD timeserver you get
the error message:
nagios at nagioshost:/opt/nagios/libexec >check_ntp -H XX.XX.XX.XX
server XX.XX.XX.XX, stratum 2, offset -0.027646, delay 0.02621
ntperr = 0
27 Nov 13:06:05 ntpdate[16598]: adjust time server XX.XX.XX.XX offset
-0.027646 sec
ntperr = 0
***Server reports a format error in the received packet (shouldn't
happen)
UNKNOWN: Dispersion too high
So I tried this manually, et voila:
nagios at nagioshost:/opt/nagios/libexec >ntpdc -s XX.XX.XX.XX
***Server reports a format error in the received packet (shouldn't
happen)
But if you use ntpq :
nagios at nagioshost:/opt/nagios/libexec >ntpq -c pe XX.XX.XX.XX
remote refid st t when poll reach delay offset
jitter
========================================================================
======
+128.4.1.2 .GPS. 1 u 643 1024 377 104.428 17.515
36.599
+131.188.3.220 192.53.103.103 2 u 610 1024 377 16.268 16.840
3.375
+131.188.3.221 .DCFp. 1 u 630 1024 377 15.468 14.051
4.126
+130.149.17.21 .PPS. 1 u 472 1024 167 18.038 16.909
31.578
*192.53.103.103 .PTB. 1 u 190 1024 377 15.691 16.180
4.176
+129.69.1.153 .DCFp. 1 u 190 1024 377 9.221 13.958
3.472
+192.53.103.104 .PTB. 1 u 615 1024 377 16.242 17.285
2.929
LOCAL(0) LOCAL(0) 10 l 50 64 377 0.000 0.000
0.004
I fixed this by hacking check_ntp to check_ntp2. If interested, diffs
are in the attachment.
Bye,
Michael.
__________________________
Michael Klöffer
Teamleiter Service Süd
CKS SYSTEME GmbH & Co. KG
tyco fire & security
Brauerstr. 50
76135 Karlsruhe
Telefon (0721) 2032-217
Telefax (0721) 2032-219
Mail mkloeffer at tycoint.com
WWW www.cks-systeme.de
__________________________
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