Monitoring services that span hosts?

[Subhendu Ghosh]

On Thu, 10 Apr 2003, Benjamin Feen wrote:

> Greetings all,
> 
> Let's say I have a set of URLs: 
> 
> http://foo.feen.com/bar
> http://foo.feen.com/yay
> http://foo.feen.com/qaz
> (these are bogus URLs)
> 
> These URLs serve up a web application which I'll be monitoring with
> a custom plugin that logs in and performs a dummy transaction to
> verify that the site works.
> 
> Now, there's a whole three-tier architecture behind these URLs:
> web01 web02 web03
> app01 app02 app03
>    db01  db01
> 
> As I understand Nagios, every service must live on a host.  So: how
> do I implement these checks, if they don't really live on any one
> host?
> 
> 
> Thanks!
> Benjamin

If the custom plugin checks the entire transaction - it should be a 
service for the front end web server.

Other services should check - 
each webserver
each appserver
each db server

The transaction plugin should have a service dependency on all of these 
"detailed" services"

-- 

-sg



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