Limit buffer size EnvoyFilter

Hello,

I try to report old Nginx configuration “nginx.ingress.kubernetes.io/proxy-buffer-size: ‘3k’” to my Istio config.

I’ve create an Envoy Filter like this :

---
apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: bufferlimit-istio
spec:
  configPatches:
  - applyTo: CLUSTER
    patch:
      operation: MERGE
      value:
        per_connection_buffer_limit_bytes: 3000  
  - applyTo: LISTENER
    patch:
      operation: MERGE
      value:
        per_connection_buffer_limit_bytes: 3000

But it doesn’t work.

Can you confirm me that configuration is good or not ?

Thx.