Extending GatewayAPI + ClientSettingsPolicy

[Coder63]

I'm running Gateway API v1.1.0 & Nginx Gateway Fabric v1.3.0. I'm following this example- https://docs.nginx.com/nginx-gateway-fabric/how-to/traffic-management/client-settings/ to test it out.

Gateway.yaml & Client Setting Policy.yaml

apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: gateway
spec:
  gatewayClassName: gke-l7-rilb
  listeners:
  - name: http
    port: 80
    protocol: HTTP
    hostname: "*.example.com"
---
apiVersion: gateway.nginx.org/v1alpha1
kind: ClientSettingsPolicy
metadata:
  name: gateway-client-settings
spec:
  targetRef:
    group: gateway.networking.k8s.io
    kind: Gateway
    name: gateway
  body:
    maxSize: "10" # sizes without a unit are bytes.

I don't see any status /Accepted for the clientsettingspolicies.gateway.nginx.org. Started this thread nginxinc/nginx-gateway-fabric#2306 and got NGF implementation using GatewayClass: Nginx. Can we implement it without this nginx GatewayClass native to gateway.networking.k8s.io CRD's ?

[youngnick]

In general, Policy objects are implementation specific, and that includes the ClientSettingsPolicy, so it's expected that that config would not work when used with a GatewayClass that's not implemented by Nginx Gateway Fabric.

It seems like the feature you are really looking for is being able to limit the size of a response body and being able to use that with other implementations? I don't think we've had a direct request for that before, so some more detail on why you would like that would be great.

[Coder63]

My POC is to replace nginx-ingress & individual LB for services on GKE to Gateway API . With gateway.networking.k8s.io CRD's v1.1.0 alone . So I wanted to check if we do any of the traditional Nginx conf stuff like client_max_body_size where we limit request size ... Thanks in advance.