Hi we need to increase the proxy_buffer_size and related parameters on an IBM Kubernetes implementation for the Ingress/NGINX

INgress/NGINX is throwing us a error upstream sent too big header while reading response header from upstream, client

The app we're running is Meteor based which is known for creating large headers related to Browser Policy. To solve this we need to change the location settings to include:

# Increase the proxy buffers for meteor browser-policy.
proxy_buffer_size       128k;
proxy_buffers           4 256k;
proxy_busy_buffers_size 256k;

More info here http://dweldon.silvrback.com/browser-policy, if needed. Note this gist of this is we should not be turning buffering off, but increasing the buffer sizes.

Currently IBM does not support these custom params, so we'd like to inject some custom params, as per nginx.org/location-snippets as per https://github.com/nginxinc/kubernetes-ingress/tree/master/examples/customization

We'd like a way to se the above proxy buffer sizes, please let us know if/how this can be done, pls?

Another alternative, I think would be able to use nginx.org/proxy-buffer-size

thanks