Default value for use_agressive_host_checking (bug-like propertie s)

[Ethan Galstad]

This is a good example of how Nagios works.  In order to optimize 
host checks, a host that is not up is not (usually) checked to see if 
it has recovered unless one of it's services changes state after it 
has gone down.  A simple solution for this case would be to add a 
PING check service to the host.

The use_agressive_host_checking makes Nagios re-check the status of a 
DOWN or UNREACHABLE host every time a check is made of one of its 
services.  This is a grossly inefficient way of doing things for 
99.9% of all setups out there, but it can be useful.


On 30 Jul 2003 at 12:44, Voon, Ton wrote:

> Hi!
> 
> Wanted to see what other people thought about this because it looked like a
> bug to me until I found the use_agressive_host_checking parameter.
> 
> I found a situation where a host uses only NRPE to do its service checks.
> NRPE is stopped as part of a reboot, so all services are marked as CRITICAL
> and the host is DOWN. When the host boots up, NRPE fails to restart.
> However, the host is always considered as DOWN, even though pings do work,
> because the host check is not run unless use_agressive_host_checking is set
> to 1.
> 
> I understand there are performance improvements by settign this to 0, but
> Nagios appears to be reporting wrong information and that is bad publicity.
> Do people think it is a good idea for the default of
> use_agressive_host_checking to be 1?
> 
> Ton
> 
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Ethan Galstad,
Nagios Developer
---
Email: nagios at nagios.org
Website: http://www.nagios.org



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