Re: Probing more than once?

[Einar S. Idsø]

I have the exact same problem, except that I use probing of ssh ports to
verify that a machine is up and running since some of the firewalls
block icmp. This feature would be very helpful, especially if it could
be generalized for other protocols than icmp. So I'm a definite +1 :)

Cheers,
Einar S. Idsø

Stefan Alfredsson wrote:

>Hello,
>
>I use monit with ICMP to monitor the liveness of remote (a.k.a. some 15
>hops away) machines.
>
>I very often get false positives because of lost probes in
>the middle network, compared to running monit on the same LAN.
>
>As a workaround, I use the following:
>
> check host www.myserver.com with address www.myserver.com
>   start program = "/bin/true"
>   stop  program = "/bin/true"
>   if 3 restarts within 4 cycles then timeout
>        if failed icmp type echo with timeout 20 seconds then restart
>        if failed host www.vhost.com port 80 protocol http then restart
>
>
>So, three out of four probes would then trigger a timeout event.
>
>This is however a bit kludgy, as fake restarts need to be done to get to
>the timeout event. It also take three cycles before discovery.
>I also get spammed with 'restart' notifications (but they can be disabled of
>course).
>
>Is it possible to do this another way? I would imagine something like
>
> if three failed icmp type echo with timeout 5 seconds then ...
>
> where 'three failed' should indicate three consecutive attempts of
>probing, and if one of the succeeds, all is well. If all fails, then
>report.
>
>Perhaps it can be added to the wishlist? :-)
>
>Regards,
> Stefan
>
>
>
>
>
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>
>
>  
>


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