From: John Christian (potus98@yahoo.com)
Date: Wed Sep 21 2005 - 15:58:29 EDT
Hi gurus,
Two very similar Solaris 9 hosts (both NTP clients)
are keeping their clocks tuned just fine. My Nagios
monitoring server polls them using a perl script
(check_ntp) to verify their NTP stuff is in good
shape. This process was working great until a sudden
lack of electron movement (power outage) caused all
hosts to shutdown very fast.
Now that electrons are flowing again, the hosts are
responding differently to the NTP test query. It seems
'goodhost' has parsed its jitter (which is apparently
a good thing) while 'badhost' has not:
foo:/usr/local/nagios/libexec # ./check_ntp -H
goodhost
NTP OK: Offset 0.000140 secs, jitter 0.31 msec, peer
is stratum 3|offset=0.000140,
jitter=0.00031,peer_stratum=3
foo:/usr/local/nagios/libexec # ./check_ntp -H badhost
Argument "(not parsed)" isn't numeric in abs at
./check_ntp line 401.
NTP OK: Offset 0.000327 secs, jitter (not parsed)
msec, peer is stratum 3|offset=0.000327,
jitter=0,peer_stratum=3
I think I have 2 problems. One, the check_ntp script
does not handle the string "(not parsed)" being
returned when its expecting a numeric. I've submitted
that to the nagios-users list.
I hope you can help me with problem Two: How do I get
the 'badhost' to parse its jitter?
I cannot find any meaningful differences between the
two hosts. I've used xntpdc to look a detailed stats,
loop filters, and more. Both NTP clients are using the
same NTP servers. Everything looks fine from an NTP
perspective, but I think I'd like to force xntpd to
parse its jitter even if it's zero. At least then, it
might return a numeric value instead of "(not
parsed)".
BTW: I'm referring to these two hosts for illustrative
purposes. This problem is actually affecting 80% of my
hosts while 20% are okay.
TIA for any suggestions on how to troubleshoot this
further! Will summarize.
-John
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