[Xymon] SSH test checks too often for a device

Neil Simmonds Neil.Simmonds at express-gifts.co.uk
Thu Jun 28 11:50:19 CEST 2012


I should have mentioned on the below description that I am still running
this at 5 minute intervals but just using it for a bigger timeout as I
have one test that can be a bit slow. It's actually an http test that
can take more than the standard timeout. 

 

I'm sure this should be adaptable to SSH tests.

 

________________________________

From: xymon-bounces at xymon.com [mailto:xymon-bounces at xymon.com] On Behalf
Of Neil Simmonds
Sent: 28 June 2012 10:40
To: xymon at xymon.com
Subject: Re: [Xymon] SSH test checks too often for a device

 

I do this for certain ping tests.

 

I have a slowtests.sh script in my ext directory like this,

 

#!/bin/sh

 

XYMONNETWORK="slowtests"

export XYMONNETWORK

 

$XYMONHOME/bin/xymonnet --report --ping --checkresponse --timeout=20

 

 

Then my tasks.cfg has been changed so that xymonnet has the
-test-untagged option,

 

[xymonnet]

        ENVFILE /xymon/server/etc/xymonserver.cfg

        NEEDS xymond

        CMD xymonnet --report --ping --checkresponse --test-untagged

        LOGFILE $XYMONSERVERLOGS/xymonnet.log

        INTERVAL 5m

 

And I have a new entry at the bottom like this,

 

 

[slowtests]

        ENVFILE /xymon/server/etc/xymonserver.cfg

        NEEDS xymond

        CMD $XYMONHOME/ext/slowtests.sh                          

        LOGFILE $XYMONSERVERLOGS/slowtests.log

        INTERVAL 5m

 

 

Then all I do is add the tag "NET:slowtests" to the tests that I only
want to run every 20 minutes.

 

I must admit though, that I'm not sure if xymonnetagain would still pick
up a failure from slowtests and start the 1m retries. 

 

Perhaps someone else can help on that. 

 

________________________________

From: xymon-bounces at xymon.com [mailto:xymon-bounces at xymon.com] On Behalf
Of Jeremy Laidman
Sent: 28 June 2012 10:29
To: xymon at xymon.com
Subject: [Xymon] SSH test checks too often for a device

 

Hiya

 

I have a few devices on which I do an ssh check.  These devices have
some sort of self-defence mechanism and they throttle connecting to the
sshd process if they get failed connections (with no login) at too high
a rate.  Unfortunately, twice every 5 minutes (I have two Xymon servers)
is sometimes a bit too often, and once they start to fail, I'm guessing
that xymonnet-again.sh starts to hammer them every minute.  The devices
are appliances such that I cannot configure this behaviour.

 

I know there's a funky NET:location hack that can be used to adjust the
frequency of the net tests for nominated hosts, but I see no way to
limit the effect to only the ssh test, and so all tests will be slowed
down.

 

Can anyone think of a better way to do this than the NET:location hack?
I only want to slow down the ssh tests.

 

Cheers

Jeremy

 

Name & Registered Office: EXPRESS GIFTS LIMITED, 2 GREGORY ST, HYDE,
CHESHIRE, ENGLAND, SK14 4TH, Company No. 00718151.

Express Gifts Limited is authorised and regulated by the Financial
Services Authority

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Name & Registered Office: EXPRESS GIFTS LIMITED, 2 GREGORY ST, HYDE, CHESHIRE, ENGLAND, SK14 4TH, Company No. 00718151.
Express Gifts Limited is authorised and regulated by the Financial Services Authority
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NOTE:  This email and any information contained within or attached in a separate file is confidential and intended solely for the 
Individual to whom it is addressed. The information or data included is solely for the purpose indicated or previously agreed. Any 
information or data included with this e-mail remains the property of Findel PLC and the recipient will refrain from utilising the 
information for any purpose other than that indicated and upon request will destroy the information and remove it from their records.  
Any views or opinions presented are solely those of the author and do not necessarily represent those of Findel PLC. If you are not 
the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, 
or copying of this email is strictly prohibited. No warranties or assurances are made in relation to the safety and content of this 
e-mail and any attachments.  No liability is accepted for any consequences arising from it. Findel Plc reserves the right to monitor 
all e-mail communications through its internal and external networks. If you have received this email in error please notify our IT 
helpdesk on +44(0) 1254 303030
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