Host State for machines that don't allow ping

[Andreas Ericsson]

Hari Sekhon wrote:
> Hi,
> 
>    I am curios what people do when monitoring a host that does not 
> respond to pings. I have a host which is not under my control, it does 
> not respond to pings, but I am monitoring one service. The service is 
> up, so the host is up. I am not receiving notifications for this host 
> and it appears to be fine, but in the web interface, nagios has the host 
> column as red but the service column as green.
> 
> This is somewhat of a contradiction because if the service is ok, then 
> implicitly the host is up. Should the host column not be green as well?
> 
> I am considering changing the host definition's check command to a dummy 
> check instead of the usual ping check, but this seems like not quite the 
> right thing to do because the host may well be down then and the dummy 
> check will always return ok and nagios will think that host is up.
> 
> I have also considered making the host check just the same check that 
> the service is, which should work for this one host, but what about if I 
> have to do the same for other hosts, this doesn't scale, I can't 
> template it etc...
> 
> 
> These are the only 2 options I can think of, either never know if it's 
> up or not, or use the service check, but this doesn't scale and has to 
> be done on an individual host basis for any host that doesn't respond to 
> pings.
> 
> 
> Anybody got any other ideas?
> 

Write a host-check that checks the status of all services on the host. If
any service is up, the host is up.

Or, write a NEB-module to make this happen automagically whenever a host is
determined to be up and use a dummy check (that doesn't even have to exist)
for host check.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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