Determining the success or failure of external commands

[Scott Sanders]

A recurring flexible downtime is the solution I am currently using. However,
my requirements have changed because certain tasks are not scheduled by
time, but are instead triggered by other factors. So simply setting a
recurring downtime window, or blacking out certain hours from the
notification period is not an ideal solution. I would like to place the
responsibility of suppressing alerts on the script that disrupts the
service, instead of on a cron job or any other external system.

On 1/23/08, Aaron M. Segura <aaron.segura at cabelas.com> wrote:
>
> Can't you set flexible recurring downtime to solve this?
>
> Ie:  If the MySQL Database goes down between Midnight and 4am, start a
> downtime window that last for 1 hour.  If the DB is still down after an
> hour, send an alert.
>
> I wrote a PHP script you can use in cron to schedule such a downtime
> event:
>
>
> http://www.nagiosexchange.org/Downtimes.38.0.html?&tx_netnagext_pi1[p_view]=628
> http://nagios.sourceforge.net/docs/2_0/downtime.html
>
>
> On Wed, 2008-01-23 at 09:38 -0500, Scott Sanders wrote:
> > In my case, a backup job might take down a MySQL database for anywhere
> > from 1 minute to 1 hour, depending on the size of the database.
> > Because the time needed to perform the backup is flexible and the time
> > when the backup might occur is not always known, I cannot simply set
> > the affected services to only notify in a timeperiod that excludes
> > certain hours of the days. This is just an example of why I need to
> > allow scripts and applications not on the nagios host(s) to be able to
> > use the external command pipe.
> >
> > Currently I have a very simple API over https that uses the same auth
> > mechanism as the Nagios frontend, and PHP classes that I can use in my
> > client side scripts to manipulate this API. I am able to query Nagios
> > about object data and status data, as well as submit commands to the
> > nagios.cmd pipe. In order for the external command functionality to
> > work the way I intend, I need to obtain a response from nagios so my
> > server can respond back to the client with the results of processing
> > the external command. I am really hoping there is an easy way to do
> > this, as replacing the nagios.cmd file with something besides a FIFO
> > pipe requires modification to the nagios source and is something I was
> > trying to avoid.
> >
> > Thanks for the response. I hope this makes sense.
> >
> > -Scott
> >
> > On 1/23/08, Andreas Ericsson <ae at op5.se> wrote:
> >         Scott Sanders wrote:
> >         > Hi,
> >         >
> >         > I am working on implementing some functionality that will
> >         allow me to safely
> >         > expose nagios.cmd to external hosts. In my environment there
> >         are maintenance
> >         > tasks that run periodically which disrupt certain services,
> >         causing nagios
> >         > to start generating alerts. Needless to say, I am tired of
> >         having my cell
> >         > phone go crazy when this happens.
> >
> >         In that case, why not ask "How do I keep my cellphone from
> >         waking me up?"?
> >         Instead, you've thought up a solution to your problem, which
> >         generates
> >         other problems, and now you want help solving those other
> >         problems.
> >
> >         Assuming you know when these disruptive tasks are run, you
> >         should simply
> >         create a notification_period that doesn't include the
> >         sensitive hours
> >         and use that notification_period for the services being
> >         disrupted.
> >
> >         There are other solutions too, but this one is normally the
> >         recommended,
> >         so I suggest you try that out first.
> >
> >         --
> >         Andreas Ericsson                   andreas.ericsson at op5.se
> >         OP5 AB                             www.op5.se
> >         Tel: +46 8-230225                  Fax: +46 8-230231
> >
> >
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