Virtual Services???

[Thomas Nilsen]

Maybe a host/service dependency setup could help you here...
 
Have a look at http://nagios.sourceforge.net/docs/1_0/dependencies.html and 

-----Original Message-----
From: Miguel A. Torres [mailto:matorres at prisacom.com]
Sent: Friday, May 09, 2003 6:35 PM
To: Jason Lancaster; nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] Virtual Services???


Hello Jason, 
 
Thanks for your quickly answer. I think that you don't undertand what I mean by a "virtual service". I`m try to explain it better with a example:
 
I have 3 servers with apache:
 

define host{
  host_name server1
  address 1.1.1.1
}
  
define host{
  host_name server2
  address 1.1.1.2
}
 

define host{
  host_name server3
  address 1.1.1.3
}
 ========================
define service{
  host_name server1
  service_description HTTP check
}
 

define service{
  host_name server2
  service_description HTTP check
}
  
define service{
  host_name server3
  service_description HTTP check
}
 
These services are in diferent hosts and serve the same URL's, they are in balancing. Now I want to define a "virtual host" that group these 3 services. The "virtual host" should be configured with this rules:
 
    - If only one web server turn to critical state ------> OK
    - If more than one server turn to critical state ------> WARNING
    - If all de web servers turn to critical state ----------> CRITICAL
 
I don`t know how to configure the "virtual host" and if it is possible. Note: The "virtual hosts" should not be associated to a host (if it was possible)
 
Do you understand what I mean by virtual host now??
 
thanks a lot.
 
 
 
 -----Mensaje original-----
De: Jason Lancaster [mailto:jlancaster at affinity.com]
Enviado el: viernes, 09 de mayo de 2003 17:47
Para: Miguel A. Torres; nagios-users at lists.sourceforge.net
Asunto: Re: [Nagios-users] Virtual Services???



I'm not really understanding what you mean by a virtual service. What I was able to get out of this email was that you want to define a service such as check_http to check the same "host" multiple times, for example:
 
define service{
    host_name www.domain.com
    service_description HTTP check
}
 
...but have this issue it's results to more than one host. If you try and define that service to check host www.domain.com twice, you will get an error. Therefore, you need 2 hosts defined in your hosts.cfg like:
 
define host{
  host_name www.domain.com.internal
  address 127.0.0.1
}
 
define host{
  host_name www.domain.com.virtual
  address 127.0.0.1
}
 
Then define a service to check_http for each of these hosts, and you'll be ok. Just make sure check_http uses the ip address and not the hostname.

 
define service{
    host_name www.domain.com.internal
    service_description HTTP check
}
 
define service{
    host_name www.domain.com.virtual
    service_description HTTP check
}
 
Hope this helps!
 
-Jason

----- Original Message ----- 
From: Miguel  <mailto:matorres at prisacom.com> A. Torres 
To: nagios-users at lists.sourceforge.net 
Sent: Friday, May 09, 2003 10:40
Subject: [Nagios-users] Virtual Services???


Hello, 

I'm configuring nagios to monitoring a lot of services. I need to group many services in a "Virtual service" who it is not associated to a host. For example:

I have 3 machines with webs servers, so I have configured 3 independent services associated with it`s respective host. Now I want to configure a "virtual service" who include those 3 services. I have been reading all the documentation for nagios and I don`t find how can I make it. 

My question is:    Is it possible with nagios? 

Thanks and excuse my poor english. 



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