Possible bug - host notifications

Jeff Williams jeffwilliams05 at gmail.com
Wed Oct 19 17:48:43 CEST 2005


Isn't it true that not doing host checks causes you to get notified
for each individual service if that host is down though? Why not put
more load on your nagios box and have slower service checking in those
situations rather than spamming your phone/email with notifications?
Maybe it depends on how many services your hosts have on average.
Personally, most of our hosts have at least 10 services and I would
sure hate to have 10 text messages per host if a host is unreachable.

Jeff

On 10/16/05, Hendrik Baecker <b00mer at gmx.net> wrote:
> Hi John,
>
> it might be incorrect, that you're getting notifications after only one
> host_check. I hope, that your central Server has the max_attempt for
> your hosts even above "1", if your central Server is your notification
> sending one...
>
> But let me tell you, that it is a realy bad idea to just do host
> checking on your systems. Every host check will be a high priority check
> in Nagios working queue, every other check will be hold on until the
> host check is finished.
>
> Read here:
>
> http://nagios.sourceforge.net/docs/2_0/checkscheduling.html#host_checks
>
> Why don't you just create a service like "ICMP" for each of your hosts
> with check_command = check_icmp?
>
> Yes, I know, it sounds like double checking with these pings, but it's
> the best for your performance.
>
> It should be performance rule #1: Do everything to avoid host checks ;)
>
> Greets
> Hendrik
>
> John Stefani schrieb:
>
> >Hi,
> >
> >I am monitoring switches and routers, and since there are no services
> >running on these devices I had to enable the check_interval directive in
> >the host configuration.
> >Although I set max_check_attempts to be a value greater than one, I get
> >notifications after only one of the checks fails.
> >I use the check_fping plugin with the -n option set to 4.
> >
> >I have nagios set up in a distributed environment, so the check results
> >are being sent with nsca to a central nagios server that accepts passive
> >hosts and service checks and does not do any active checks.
> >
> >If anyone experienced my problem of being notified after only one check
> >fails for a host and perhaps managed to fix it or has some suggestions I
> >would greatly appreciate some help.
> >
> >Many thanks
> >
> >- John
> >
> >
> >
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>
>
>
>
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