Question to check_command on hosts
Sand Philipp
Philipp.Sand at sycor.de
Mon Aug 23 13:40:14 CEST 2004
[...snip]
> >> Is it a bug, or a feature, that, by default the check_command isn't
executed
> >>when there is no service check applied to the host?
> > It's a feature - Nagios is service-centric, not host-centric. The
> > host check command is only used when a service check fails to
> > determine if the failure is because the service is broken
> or because
> > the entire host is down.
Ok, that makes sense.
> In Nagios 2.x you can force nagios to run host checks.
Ok, just saw this feature and the warning combined with it :)
> Nagios 2.0a1 is stable enough for us to start shipping to
> customers in about a months time (it's been up and running
> well over two months now at various locations and
> configurations), although we had to quirk it a bit to get it
> to build properly the way we wanted it to.
Agreed, 2.0a1 runs here quite stable since about 2Months.
> > If you don't need to check any services on a host, just add a Ping
> > service or something like that.
> This is a good idea even if you choose to force host checks
> with Nagios 2.0. Host checks serialised, while service checks
> are run in parallell (how many l's should there be?).
Had done it like this so far, but wondered why I should do the same
check twice per host, because my check_host-alive is a simple ping,
too...
Now I ran into another Problem:
I keep getting a notification from a Host, the first time, the
check-host-alive gets critical, although I defined the max_check_attemps
with 4.
Here's me config:
define host{
name template-wan
notifications_enabled 1 ; Host notifications are
enabled
event_handler_enabled 0 ; Host event handler is
enabled
flap_detection_enabled 1 ; Flap detection is
enabled
process_perf_data 0 ; Process performance
data
retain_status_information 1 ; Retain status
information across program restarts
retain_nonstatus_information 1 ; Retain non-status
information across program restarts
checks_enabled 1 ; enable checks on Host
check_command check-host-alive
contact_groups network-group
max_check_attempts 4
notification_interval 0
notification_period 24x7
notification_options d,r ; d = down , u =
unreachable , r = recovered
register 0 ; DONT REGISTER THIS
DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}
When the Host goes down, I immediately get a notification, Status is
Critical, the Current Attempt is 1/4 State Type is HARD, and the Last
State Change and Last Host Notification are at the same time???
Shouldn't the notification when it s Attempt 4/4??
Another thing, I don't understand, is the thing, that the service check
is performed although the host is down, wouldn't it be better there, to
leave the servicecheck alone when the hostcheck returns a critical?
Regards,
Philipp
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