EnvoyFilter Applies but no changes are made

Config
1

Hey there!

I’m trying to set/increase the max_request_headers_kb setting. My config is:

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: app-filter
  namespace: app-dev
spec:
  configPatches:
  - applyTo: NETWORK_FILTER
    match:
      listener:
        filterChain:
          filter:
            name: "envoy.filters.network.http_connection_manager"
    patch:
      operation: MERGE
      value:
        name: "envoy.network.http_connection_manager"
        typed_config:
          "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager"
          max_request_headers_kb: 9

This validates and applies successfully, and I don’t see any errors in the logs, but the setting doesn’t appear to be picked up and applied in the pod:

...
    "listeners":[
      {
        "address": {...},
        "filter_chains": [{
            "filters": [
              {
                "name": "envoy.filters.network.http_connection_manager",
                "typed_config": {
                  "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager",
                  "codec_type": "AUTO",
                  "stat_prefix": "stats",
                  "route_config": {...},
                  "http_filters": [{...}]
                }
              }
            ]
          }
        ]
      },
      {
        "address": {...},
        "filter_chains": [
          {
            "filters": [
              {
                "name": "envoy.filters.network.http_connection_manager",
                "typed_config": {
                  "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager",
                  "codec_type": "AUTO",
                  "stat_prefix": "agent",
                  "route_config": {}
            ]},
                  "http_filters": [{...}]
      }
...

What am I missing?

2

Figured it out, it should have been maxRequestHeaders