envoy HTTP/3 conf for test

envoy.yaml

static_resources:
  listeners:
  - name: listener_tcp
    address:
      socket_address:
        protocol: TCP
        address: 0.0.0.0
        port_value: 8443
    filter_chains:
    - transport_socket:
        name: envoy.transport_sockets.tls
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext
          common_tls_context:
            tls_certificates:
            - certificate_chain:
                filename: /etc/envoy/server.crt
              private_key:
                filename: /etc/envoy/server.key
            alpn_protocols:
            - h3
            - h2
            - http/1.1
      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: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              response_headers_to_add:
              - header:
                  key: alt-svc
                  value: h3=":443"; ma=86400, h3-29=":443"; ma=86400
              domains: ["*"]
              routes:
              - match:
                  prefix: "/"
                direct_response:
                  status: 200
                  body:
                    inline_string: "envoy"
          http3_protocol_options:
          http_filters:
          - name: envoy.filters.http.router
  - name: listener_udp
    address:
      socket_address:
        protocol: UDP
        address: 0.0.0.0
        port_value: 8443
    udp_listener_config:
      quic_options: {}
      downstream_socket_config:
        prefer_gro: true
    filter_chains:
    - transport_socket:
        name: envoy.transport_sockets.quic
        typed_config:
          '@type': type.googleapis.com/envoy.extensions.transport_sockets.quic.v3.QuicDownstreamTransport
          downstream_tls_context:
            common_tls_context:
              tls_certificates:
              - certificate_chain:
                  filename: /etc/envoy/server.crt
                private_key:
                  filename: /etc/envoy/server.key
      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: HTTP3
          stat_prefix: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match:
                  prefix: "/"
                direct_response:
                  status: 200
                  body:
                    inline_string: "envoy"
          http3_protocol_options:
          http_filters:
          - name: envoy.filters.http.router