Feature request: health checks and active

[Maxim Dounin]

Hello!

On Sat, May 04, 2024 at 12:08:59PM +0200, Jaume Sabater wrote:

> Dear Maxim,
> 
> First of all, thanks for taking the step forward to create `freenginx`. I
> wish you all the best.
> 
> Following up on this thread from March 2024 [1], I'd like to
> request/suggest the active health checks [2] [3] feature built into
> `freenginx`:
> 
> 1. Special requests are regularly sent to application endpoints to make
> sure they are responding correctly.
> 2. They enable continuous monitoring of the health of specific application
> components and processes.
> 3. They enable fine grained control of the traffic to improve deploy
> processes.
> 
> Thanks and keep up the good work.

Thanks for the suggestion.

I personally not a big fan of active health checks, and rather 
think that checking actual upstream responses is much better and 
cleaner way to monitor upstream servers health.  And actual 
implementations I've seen so far, including the one available in 
NGINX Plus, are quite far from reaching the code quality and 
usability I would expect in [free]nginx.

Still, it is understood that in some use cases active checks can 
be useful.  I'll take a closer look to see how things can be 
improved here.

-- 
Maxim Dounin
http://mdounin.ru/