[Web-Interface] CGI load workaround

[Marc Powell]

> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net [mailto:nagios-users-
> admin at lists.sourceforge.net] On Behalf Of Marcel Mitsuto Fucatu Sugano
> Sent: Thursday, October 27, 2005 4:13 PM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] [Web-Interface] CGI load workaround
> 
> Hi,
> 
> Placed '<path_to_nagios>/var' available through a NFS partition, and
> would like to spread webservers to reduce the load on CGIs at the
> central nagios server. But the servers running the web-interface
cannot
> place commands to be executed by cmd.cgi, all permissions are set
> correctly, and we still can't figure out what we missed along the way.
> 
> Does anyone know any documentation, or links to, or any thought about
> this situation?

Nagios uses a named pipe to receive external commands. Named pipes are
not supported over NFS so at best you'll end up with at read-only view
on the other hosts. We've done this in a similar fashion.

Purely speculating, it may be possible to specify a path to the command
file that is unique to each machine then write a small daemon that
creates the pipe on each machine, reads the external commands and ships
them off to the master server for insertion there. Sort of like NSCA but
for external commands. I am not aware of any work that has been done
like that though. That seems like it might be an interesting project to
enhance the scalability of Nagios.

The alternative of course is to change the way that Nagios receives
external commands to be NFS friendly. I believe there may be compelling
reasons to stick with a named pipe however.

--
Marc


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