[Xymon] SSH test checks too often for a device

[Jeremy Laidman]

Thanks Neil.  However, the method you use affects all xymonnet tests for
the tagged server(s), not just the one causing you timeout problems.  In my
case, it's unacceptable because it would delay more critical tests like
ping tests, and it would take longer for me to find out when a server has
gone off-line.

I just wish xymonnet supported a command-line switch to specify a list of
tests to include and/or exclude.  Then I could do something like this:

[sshnormal]
        CMD xymonnet --report --ping --checkresponse --tests:ssh
        INTERVAL 5m

[sshslow]
        CMD ssh -c 'XYMONNETWORK=sshslow xymonnet --report --ping
--checkresponse --tests:ssh'
        INTERVAL 10m

or similar.

J


On Thu, Jun 28, 2012 at 7:50 PM, Neil Simmonds <
Neil.Simmonds at express-gifts.co.uk> wrote:

> ** ** ** ** **
>
> 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****
>
> ** **
>
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> Express Gifts Limited is authorised and regulated by the Financial
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