Feature request: Run a script when upstream detected down/up

[Cliff Wells]

On Wed, 2008-04-30 at 05:03 -0700, Mansoor Peerbhoy wrote:
> Manlio,
> 
> Yes, I see what you're saying. 
> It is always going to be a problem if the listener cannot consume the
> data fast enough. 

I think if Nginx only updated counters (similar to OpenVZ's bean
counters) this would not be an issue and would work well with the shared
memory/virtual file approach (and fits better with the idea of event
monitoring vs logging/post-mortem).  Rather than a stream of data you
have a "file" of fixed size that's constantly updated. It also
simplifies the parsing of the data by an external application. 

If a virtual file system (like /proc) were used, then it should also be
possible to use inotify (or similar) from external apps to be notified
of events (although this might be too busy).

Regards,
Cliff