[Xymon] Green status during a total blackout

Ryan Novosielski novosirj at umdnj.edu
Fri Jul 29 18:11:24 CEST 2011

Hash: SHA1

I think he does have a point here... couldn't it retroactively, when
drawing up history and graphs, say "there's a big hole here where
nothing was erased?" The way Xymon so far processes information might
make this a non-trivial task, however -- don't know.

On 07/27/2011 06:54 AM, Neil Simmonds wrote:
> If your Xymon server was down how could it recognise that it had not received any data?
> If it received data within 5 minutes of it restarting then I would fully expect it to show green for the intervening period. I don't think Xymon can recognise that it was itself down and therefore show white/purple in the history. The timer that causes these statuses would have been reset by the reboot which would mean that as long as it then receives data from the clients within the new refreshed timer period it would stay green.
> The only way I can think of that would allow you to see when the power outage occurred on Xymon would be to have your Xymon server attached to a UPS that would keep it alive for at least 10 minutes.
> -----Original Message-----
> From: xymon-bounces at xymon.com [mailto:xymon-bounces at xymon.com] On Behalf Of L.M.J
> Sent: 27 July 2011 11:46
> To: Vernon Everett
> Cc: xymon at xymon.com
> Subject: Re: [Xymon] Green status during a total blackout
>  On Wed, 27 Jul 2011 14:00:44 +0800, Vernon Everett wrote:
>> When you had the outage, did your Xymon server go down too?
>> If it did, then what you are seeing makes sense.
>> Xymon looks for status changes.
>> If everything went down, including Xymon, then it would never have
>> received any messages, nor been able to perform any other tests, like
>> ping etc.
>> I am guessing that when power was restored, you brought up all your
>> other servers first, and then started Xymon. Or they all started up 
>> around the same time.
>> The root cause of your issue, or rather the lack of issue, is that
>> Xymon never recieved any reports of problems. Because it couldn't.
>  Yes, it's exactly what happened and no one is shocked about this 
>  behaviour ?
>  I would expect, at least, a white stripe in the "History" page of each 
>  status check. Nothing has been reported during 6h, this is never happens 
>  in a every day functioning. Type or paste your English text here and 
>  click on the "Check Text" button.
>> On 27 July 2011 12:45, L.M.J <linuxmasterjedi at free.fr> wrote:
>>> Le Mon, 25 Jul 2011 11:28:30 +0200,
>>> "L.M.J" <linuxmasterjedi at free.fr> a écrit :
>>>> When the power came back, Xymon came back too. I've checked all
>>>>  monitored equipment, everything was green during the past 6h. I 
>>>> was
>>>>  expecting purple or white color because no data has been reported 
>>>> during
>>>>  the time. Is that a bug or a setting I could adjust ?
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