Notification issues

[Andreas Ericsson]

Wilmot, Doug wrote:
> Hello,
> 
>  
> 
>             My company is currently running Nagios 1.2 and we seem to be
> having some notification problems. One of the most frequent problems is a
> host down alert "plug-in timed out after 10 seconds". Then Nagios sends an
> email alert which is becoming very redundant and making us almost "immune"
> to these alerts. Meanwhile, we have a second build of Nagios version 2.x
> running on a separate node which we are "building from scratch".
> 
>  Our goal is to have an alert sent to our helpdesk app (via email) to open a
> ticket if a host is down for 5 or more minutes, then another when the host
> is back up. We are currently using check_ping for monitoring but I have
> heard some people use check_icmp. Which one would be better for us and what
> are the differences?

check_icmp implements a more clever scheduling algorithm and sends 
packets at a faster rate (and thus completes faster which doesn't hold 
up Nagios for so long). Since it doesn't use a backend program and parse 
output it can usually also detect what is causing the packets to be lost 
and, more importantly, WHERE they are lost, as such;
./check_icmp -H 193.201.96.144
CRITICAL - 193.201.96.144: Time to live exceeded in transit @ 
213.88.215.13. rta nan, lost 100%

In this case, 213.88.215.13 is the failing router.

A cautionary note though; One user has reported check_icmp to fail from 
a NetBSD hosted Nagios. I'm fairly certain this is a network issue that 
has nothing to do with check_icmp.

>  Should we be using escalations to achieve this 5
> minute delay? We have tried the rtfm approach and quite frankly I feel like
> I am spinning wheels here. Any help is greatly appreciated.
> 

Escalations would be the proper way to go, yes.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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