[Nagiosplug-help] how to monitor crond service

[asam30 at gmail.com]

thanks. I will try check_procs and let you know.

On Sat, Sep 6, 2008 at 3:51 AM, Thomas Guyot-Sionnest <dermoth at aei.ca>wrote:

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> On 05/09/08 09:41 AM, Heiko wrote:
> > On Fri, Sep 5, 2008 at 1:27 PM, Thomas Guyot-Sionnest <dermoth at aei.ca>
> wrote:
>  > On 05/09/08 02:52 AM, asam30 at gmail.com wrote:
> >>>> Hi,
> >>>>
> >>>> I've few of HP UX and Linux boxes that were monitored by Nagios. for
> the
> >>>> past few days, I've observed that cron service on HP UX keeps shutting
> >>>> down and I need to manually restart cron service. Is there any way
> >>>> through nagios we can monitor cron service on HP UX or Linux boxes so
> I
> >>>> can login before no one compliance and restart the service?
> > Please do not cross-post to multiple mailing lists.
> >
> > if you have NSCA running on the Nagios server and send_nsca on the
> > client (and properly configured), do the following:
> >
> > 1. Create a passive service on Nagios (ex.: "Cron")
> > 2. Set the freshness threshold for that service (ex.: 350 seconds), and
> > use check_dummy as the active check (returning WARNING or CRITICAL
> > depending on your preferences)
> > 3. On the server, add a cron entry (according that the threshold in 3 is
> > adjusted for 5-minute intervals):
> >>>> */5 * * * * nagios echo -e "<hostname>\tCron\t0\tOK: Cron is running"
> | /path/to/send_nsca -H <monitor_host> -c <config_file>
> > NB.: I don't know about HP-UX but some cron daemons do not support */5
> > so you have to put "0,5,10,15,20,etc..." instead. If you're editing a
> > user crontab, remove the "nagios" argument (some cron do not support
> > system crontabs at all so you must edit a user's crontab)
> >
> >
> > Although if you're running important scripts/programs from crond, you
> > could simply monitor the scripts/rograms either by modifying them where
> > possible, or using a wrapper script to report status to send_nsca. This
> > way you won't have to monitor the daemon itself.
> >
> >
> > Oh, another way is to use check_procs, looking fro "crond", but if your
> > daemon just locks the check won't fail.
> >
> >> i did define the check like the following:
> >
> >> define command{
> >>         command_name    check_crond
> >>         command_line    $USER1$/check_snmp -H $HOSTADDRESS$ -P 2c -C
> >> $ARG1$ -o UCD-SNMP-MIB::prCount.2 -s 1
> >> }
>
> This requires UCD_SNMP or NET_SNMP, which might now be whatMs on your
> HP-UX box. It's possible that you have HP-UX specific MIBs for
> processes, but I can't help you regarding this.
>
> The simplest and most complete way is to have a cron job reporting back
> to Nagios as it check if Crond is also running scheduled jobs (what if
> the daemon is blocked somehow?). This is my suggestion quoted above.
>
> Another way that should work fairly well is using check_procs from
> Nagios-plugins, which has been designed to be portable among different
> platforms. I'm not very experienced with check_procs but I believe you
> can also check the state of the process, so you could probably alert if
> crond is not running or sleeping.
>
> - --
> Thomas
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-- 
Shankar Asam
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