check_ntp_time offset unknown

[Giles Coochey]

On 14/06/2013 15:10, Bennett, Jan wrote:
>
> We have implemented a NTP sync check in all of the NRDS checks that we 
> are rolling out right now but I've run into a bit of a snag.
>
> I am getting returns of 'Offset Unknown' on all clients.  It appears 
> to only happen for a short period of time (30 min or so) and then it 
> will clear its self up for a bit but the issue will always return.
>
> From the client that is reporting the unknown offset, I can run the 
> following:
>
> # ./check_ntp_time -H localhost
> NTP CRITICAL: Offset unknown|
> # ./check_ntp_time -V
> check_ntp_time v1.4.16 (nagios-plugins 1.4.16)
> # ntpdc -p
>      remote           local     st poll reach  delay   offset    disp
> =======================================================================
> =LOCAL(0)        127.0.0.1    10   64   17 0.00000  0.000000 0.96858
> *timeserver1  xxx.xxx.xxx.xxx    2   64   17 0.00098  4.956048 0.00580
>
> # /usr/local/nagios/libexec/check_ntp_time -v -H localhost
> sending request to peer 0
> response from peer 0: offset -2.777669579e-07
> sending request to peer 0
> response from peer 0: offset -2.161832526e-07
> sending request to peer 0
> response from peer 0: offset -4.009343684e-07
> sending request to peer 0
> response from peer 0: offset -1.987209544e-07
> discarding peer 0: stratum=0
> overall average offset: 0
> NTP CRITICAL: Offset unknown|
>
> In my searches, I noticed a number of people reporting the same issue 
> with the supposed solution being to update your Nagios plugins to 
> 1.4.13.  I have done so and am now running 1.4.16 without any change 
> in the service check.
>
> Also, I am unable to check a remote NTP server from these clients as 
> they do not have access to the outside world.
>
> It has been suggested that the stratum=0 may be the culprit, but I'm 
> not sure of my options here.
>
> Any help would be greatly appreciated.
>
>
I get this shortly after a NTP client has booted up. Once NTP has been 
running for a while it goes away.

-- 
Regards,

Giles Coochey, CCNP, CCNA, CCNAS
NetSecSpec Ltd
+44 (0) 7983 877438
http://www.coochey.net
http://www.netsecspec.co.uk
giles at coochey.net

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