proxy_protocol - inbound or outbound

[justinsb]

I think nginx can use the proxy protocol for inbound connections (useful if nginx has an upstream load balancer, like ELB) and it can also use the proxy protocol for connections to the backends.

My understanding is that if you put proxy_protocol on the listen line that configures the listener, wherease if you put it on its own line with proxy_protocol on that is for connections to downstreams (i.e. k8s pods).

So I think this should be on the listener:
https://github.com/kubernetes/ingress/blob/80e718b5241515de2935e7028486e29a5f49fda7/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl#L438

[aledbf]

@justinsb what you describe applies to a server sections. The line you indicate is for the stream section https://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_protocol