AW: distributed and redundant monitoring

[Thomas.Zimmer at oppenheim.de]

I think, I have an easy solution without any additional tools or
nagios-monitors, pls. correct me if I´m wrong:

Assuming that all three monitors send notifications:
Monitors A, B, C check host D with, let´s name it service1. Service1 has
deactivated notifications, but submits his results to the other both hosts.
Each host (A,B,C) has two services accepting the passive results of the
other two hosts. These two services, let´s name them service2 and service3,
don´t send notifications as well.

At least, each of the hosts A,B,C implement an additional active service
(service4) which checks host D (again), and sends notifications. The only
thing left is to set two service-dependencies, which supress notifications
of the only active notification-sending service4, if one of the passive
result-accepting services 2&3 is in an OK state.

Perhaps you´ll have to implement service1 twice, depending on the
possibilities of sending passive check results. I haven´t yet used passive
checks.

The execution (and sending) frequency of checks 1,2 and 3 should be higher
than for service4.

Greetz.

Thomas Zimmer
Produktservice & Betrieb
Betrieb & Support
Sal. Oppenheim jr. & Cie., Frankfurt a. Main
Internet: http://www.oppenheim.de
E-Mail: thomas.zimmer at oppenheim.de



-----Ursprüngliche Nachricht-----
Von: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net] Im Auftrag von Marcel
Mitsuto Fucatu Sugano
Gesendet: Mittwoch, 23. November 2005 15:55
An: Izotov Igor
Cc: nagios-users at lists.sourceforge.net
Betreff: Re: [Nagios-users] distributed and redundant monitoring


On Wed, 2005-11-23 at 17:20 +0300, Izotov Igor wrote:
> Some time ago I asked the same question. Maybe something has changed 
> ever since. I need to create the following monitoring process:
> A,B,C are monitoring servers, distributed all over the world, seeing each
> other.
> D is the monitored host.
> notifications should be sent only in case when D is not responding to all
of
> them (A && B && C).
> Can it be done by means of Nagios?
> Say, can we build the system like http://websitepulse.com using Nagios?

I can be telling nothing but speculative stuff here, but...

Nagios A, B & C, running active checks, and sending results passively to
some other Central Nagios, let's say... Nagios X.

On Nagios X, you will need to configure 3 services, one for each Distributed
Nagios servers (A, B and C). Then you can configure only Nagios X to send
notifications about host D going down, after made sure with a fourth active
check made by Nagios X, after getting stale results from the distributed
servers.

It's how it came up to me, but other people can have other solutions aswell.

Like configuring service dependencies, or service escalation, whatever
solution you get. IMO, Nagios could do the job.

cheers.
-- 
Marcel Mitsuto Fucatu Sugano <msugano at uolinc.com>
Universo Online S.A. -- http://www.uol.com.br


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