NGINX Proxy Buffer Configuration

[mpstefan]

As a user of NGF I want to configure NGINX's proxy buffer configuration for my applications So that when any part of my request exceeds the needed proxy buffer I can increase the limit to support my traffic.

Acceptance

• NGINX directives:

  • proxy_buffer_size
  • proxy_buffers
  • proxy_buffering
  • proxy_busy_buffers_size

• The NGINX Extensions design is reviewed to implement the above directives.

• The above directives are configurable via a ProxySettingsPolicy for the scope it is applied at.

• The ProxySettingsPolicy can be attached to a Gateway or Route.

Feedback

• Needed for https://github.com/nginxinc/nginx-gateway-fabric/discussions/2111

[mpstefan]

Are there any additional directives we want to look at to include in proxy buffer configuration? What policy should proxy buffer configuration be a part of?

[github-actions[bot]]

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[pleshakov]

From NGINX community slack https://nginxcommunity.slack.com/archives/C03SXACMUBE/p1708990162329589 , there is also a related large_client_header_buffers directive -- https://nginx.org/en/docs/http/ngx_http_core_module.html#large_client_header_buffers

[uptickmetachu]

Can confirm we also need large_client_header_buffers as well.

This is blocking our adoption of ngf.