istio/src/metadata-exchange-1.4-envoyfilter.yaml

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: metadata-exchange-1.4
  namespace: istio-system
  labels:
    istio.io/rev: default
spec:
  configPatches:
    - applyTo: HTTP_FILTER
      match:
        context: ANY # inbound, outbound, and gateway
        proxy:
          proxyVersion: '^1\.4.*'
        listener:
          filterChain:
            filter:
              name: "envoy.http_connection_manager"
      patch:
        operation: INSERT_BEFORE
        value:
          name: envoy.filters.http.wasm
          config:
            config:
              configuration: envoy.wasm.metadata_exchange
              vm_config:
                runtime: envoy.wasm.runtime.null
                code:
                  inline_string: envoy.wasm.metadata_exchange