1 Host 2 IP

[Israel Brewster]

You can check multiple IPs in one check (and thus, one host) using  
check_icmp. This is a basic ping-type check, but it has a flag to say  
you only need one of the ips to return in order for the host to be  
considered up. Or just symlink it to check_host, and it returns OK as  
soon as it receives one reply, regardless of which IP the reply comes  
from. As far as monitoring different services on each host, what  
you'll have to do is make custom check commands that accept the ip as  
one of the arguments ($ARG1$ for instance) rather than just assuming  
the host address, which will still have to be set to a single IP even  
if using check_icmp.

What I've done on a number of hosts of ours that have multiple IPs is  
to set the host check as check_icmp, looking at both IPs and only  
going critical if both are down. I then make a service that is also  
check_icmp, looking at the specific ports. That way I get a host  
critical alert if both are down, but otherwise the host stays OK, and  
just the service corresponding to the specific ip that isn't working  
goes critical. Works well for us.

-----------------------------------------------
Israel Brewster
Computer Support Technician
Frontier Flying Service Inc.
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7250 x293
-----------------------------------------------


On Feb 18, 2009, at 7:09 AM, Romain VRIGNAUD wrote:

>
> I have to migrate a 1.x nagios to the last stable.
> Until now, each host is defined 2 times for each network interface.
> However I think it makes the overview more complicated to analyse.
> So I'm seeking a way to make Nagios understand that they are the  
> same physical host. Is there a something to do in configuring host  
> group ?
>
> I don't understand your second question. I use different checks  
> (ssh / nrpe / nsca / nsclient ) but I don't see the point.
>
> Romain
> -----Message d'origine-----
> De : Assaf Flatto [mailto:assaf.flatto at ssp-intl.com]
> Envoyé : mercredi 18 février 2009 16:57
> À : nagios-users at lists.sourceforge.net
> Objet : Re: [Nagios-users] 1 Host 2 IP
>
> you can create different host for each ip and create test (services)  
> for those host with no
> overlapping on the definitions .
>
> The issue is to know if you are using external checks only or also  
> using NRPE of another client to
> execute checks on the machine ?
>
> Assaf
>
>
> On Wednesday 18 February 2009 15:46:31 Romain VRIGNAUD wrote:
>> Hi
>>
>> I'd like to know how should I configure Nagios for my hosts which  
>> have
>> multiple ip address.
>>
>> I'd like that Nagios consider them as only one host but I don't  
>> know how
>> to configure that.
>>
>> On top of that, I need to check different services on the different  
>> IPs.
>>
>>
>>
>> How should I do ?
>>
>>
>>
>> Regards
>
>
>
> -- 
> Assaf Flatto
> SSP Ops Team
> Linux System Administrator
> 169 Euston Road, London, NW1 2AE
>
>
>
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-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
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