Reverse proxy that forward requests to ALL upstream servers?

[Yongtao You]

Hi,
I have a rather special requirement. I need to setup a reverse proxy with multiple upstream servers, and whenever a POST request comes in, I want NGINX to forward the request to ALL the upstream servers. And the response code will be the highest (worst) one among all responses from the upstream servers. Is it doable?
Thanks.Yongtao
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