config.yaml

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: envoy-filter-for-service-a
  namespace: my-namespace
spec:
  workloadSelector:
    labels:
      app: service-a
  configPatches:
    - applyTo: CLUSTER
      patch:
        operation: MERGE
        value:
          http2_protocol_options:
            initial_stream_window_size: 1048576 # 1mb
    - applyTo: NETWORK_FILTER
      match:
        listener:
          filterChain:
            filter:
              name: "envoy.http_connection_manager"
      patch:
        operation: MERGE
        value:
          typed_config:
            "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager"
            http2_protocol_options:
              initial_stream_window_size: 1048576 # 1mb