Sugguestion/Question?

[Tom Tran]

Dear Harper and All,
   
  Thank you very much for you explanation.   I am totally clear  and I have no problem with that at all.
   
  However,  don't you think it's better this way.
   
  Supposed you are the network admin,  sitting in front of huge monitor and managing a status map of your entire network which has about 200 critical servers...  if all the servers are up and running..   So, they are all green.   How do you know which one has a problem like Running out of disk space or exchange process has just stopped?  If you can propagate,  when the exchange process stopped, it goes to critical status..  this child service will propagrate to the parent node... and the network admin will see.. Oh.. something is wrong with node xyz. because it's RED.. so let me drill down that node to see what's going on?
   
  Best regards,
  Tom Tran,
  PS:  The statements above is CONSTRUCTIVE suggestion.  I am not trying to compare Nagios to any product.    It is just my thought to help us to have a better Nagios if you guys think my suggestion is useful.
   
  

Harper Mann <hmann at groundworkopensource.org> wrote:
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Hi Tom,
Nagios has two top-level types of check, host checks and service
checks.  Host checks are a check that verifies the host is up.  It's
generally defined as a ping check.  Service checks check services like
disk, cpu, swap, etc. are running on the host.  By default, Nagios
checks a service and if it is in alarm, it runs the host check.  If
the host check fails, Nagios sends host notification and doesn't send
service notification.  If the host is up, it sends the service
notification.

Nagios, only runs the host checks if the service fails.  So if the
disk is bad, it's set critical, but the host check ping still works so
the host is not set down.  This is intentional because if the disk
fails, and the host check fails, disk notifications are suppressed as
well as the other services being checked, and you get one alarm that
the host is down and not one alarm each for each service.   Feature....

Nagios doesn't have propagation like Unicenter.  It has a host check
so it can suppress alarm storms.

Hope this helps.
Regards,
- - Harper
Harper Mann
Groundwork Open Source
510-599-2075 (cell)

Tom Tran wrote:
> Dear All,
>  
> I am a newbie with Nagios but long time user of Enterprise
> Management (CA Unicenter in particular)...
>  
> Here is my suggestion (not sure If i implemented correctly...) or it
> has been designed this way.
>  
> Suppose I am monitoring a Server.... which I am trying to monitoring
> the following:
>       Ping, disk space, Load.......
>  
> And i set the threshold for my disk space.. and the disk space
> exceeds my critical threshold; therefore,  the status for my Disk
> Space Watcher is Red (Critical)...
>  
> According to what i see right now.. the status for the whole server
> is GREEN.. I am not sure it is supposed to be green?  Isn't it
> supposed to be RED....  because of the propagation from a child level?
>  
> Hope my explanation is clear enough.
>  
> Best regards,
> Tom Tran
> EESImed.
>
>
> */Deborah Martin <Deborah.Martin at Kognitio.com>/* wrote:
>
>     Hi,
>
>     I'm running Suse 9.1 with Nagios 2.0b4
>
>     I have a service alerting as Critical which I then acknowledged.
>     Notifications were then supressed.
>     However, I had to restart Nagios sometime later after adding
>     some further
>     services/hosts and it seems that the acknowledgement still
>     remains across
>     the restart but the notifications have started again.
>
>     Is this expected behaviour ? I've trawled through the docs and
>     archives but
>     cannot find a definitive
>     answer so any advice would be appreciated.
>
>     thanks,
>     deborah
>
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