Thanks for the explanation
I understand how Nginx works with limit_req, and what I'm looking for is
precisely to find this "reasonable value" for each endpoint (testing the
application side behavior is also important, but since there are multiple
endpoints with hundreds of different functions, it might be a bit
challenging to analyze in a short amount of time).
We already use rate_limit in one of these applications, but I had to
conduct a series of tests to arrive at a reasonable value. As we have
several other services, I would like an analysis and monitoring tool to
track requests over time and be able to assess requests per minute/second
for each endpoint. This way, I can initially get a better idea and later
make a more customized adjustment. For this specific endpoint, for
example, I'm using:
limit_req_zone $binary_remote_addr zone=api:10m rate=1r/s
limit_req zone=api burst=10 nodelay
On Fri, Dec 29, 2023 at 11:07 AM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Fri, Dec 29, 2023 at 09:54:30AM -0300, Rejaine Monteiro wrote:
>
> > Hi all,
> >
> > I´m running Nginx community edition and need to implement rate limiting
> >
> > There's plenty of guides out there on how to do this, but no guides on
> how
> > to get real values/stats from the access logs
> >
> >
> > What I need to get from the NGINX access logs is:
> >
> > - Requests per minute, per IP address
> >
> > - Average requests per minute, derived from all IP addresses
> >
> > - Max requests per minute, per IP address
> >
> > We have a few endpoints with different functionalities and we simply
> cannot
> > have a common rule that works for everyone.
> >
> > Any tips on a tool or script that could help generate this type of
> > information (if possible in real time or collect this data for future
> > analysis)?
>
> Note that nginx's limit_req module implements limiting based on
> the "leaky bucket" algorithm, which permits traffic bursts when
> properly configured, and therefore there is no need to calculate
> exact rates of requests per minute and so on.
>
> Rather, I would recommend to focus on the number of requests a
> typical legitimate user can generate to the protected resources
> within a short period of time, and set large enough burst= value
> to ensure legitimate users are not limited. Then use some
> reasonable long-term rate - this does not need to be exact, but
> rather somewhat reasonable, for example, to cover typical number
> of requests per day from a legitimate user.
>
> Note well that using "nodelay" (or "delay=N") is recommended with
> such approach, see http://nginx.org/r/limit_req for details.
>
> --
> Maxim Dounin
> http://mdounin.ru/
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> nginx mailing list
> nginx@nginx.org
> https://mailman.nginx.org/mailman/listinfo/nginx
>
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