EnvoyProxy with host/port not working

[zirain]

apiVersion: gateway.networking.k8s.io/v1
kind: GatewayClass
metadata:
  name: eg
spec:
  controllerName: gateway.envoyproxy.io/gatewayclass-controller
---
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: eg
spec:
  gatewayClassName: eg
  listeners:
    - name: http
      protocol: HTTP
      port: 80
  infrastructure:
    parametersRef:
      group: gateway.envoyproxy.io
      kind: EnvoyProxy
      name: eg-gtw-config
---
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
  name: eg-gtw-config
spec:
  telemetry:
    accessLog:
      settings:
        - format:
            type: JSON
            json:
              start_time: "%START_TIME%"
              method: "%REQ(:METHOD)%"
              "x-envoy-origin-path": "%REQ(X-ENVOY-ORIGINAL-PATH?:PATH)%"
              protocol: "%PROTOCOL%"
              response_code: "%RESPONSE_CODE%"
              response_flags: "%RESPONSE_FLAGS%"
              response_code_details: "%RESPONSE_CODE_DETAILS%"
              upstream_transport_failure_reason: "%UPSTREAM_TRANSPORT_FAILURE_REASON%"
              request_headers_bytes: "%REQUEST_HEADERS_BYTES%"
              bytes_received: "%BYTES_RECEIVED%"
              bytes_sent: "%BYTES_SENT%"
              duration: "%DURATION%"
              upstream_duration: "%COMMON_DURATION(US_TX_BEG:US_RX_END:ms)%"
              "x-envoy-upstream-service-time": "%RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)%"
              "x-forwarded-for": "%REQ(X-FORWARDED-FOR)%"
              "user-agent": "%REQ(USER-AGENT)%"
              "x-request-id": "%REQ(X-REQUEST-ID)%"
              ":authority": "%REQ(:AUTHORITY)%"
              authorization: "%REQ(AUTHORIZATION)%"
              upstream_host: "%UPSTREAM_HOST%"
              upstream_cluster: "%UPSTREAM_CLUSTER%"
              upstream_local_address: "%UPSTREAM_LOCAL_ADDRESS%"
              downstream_local_address: "%DOWNSTREAM_LOCAL_ADDRESS%"
              downstream_remote_address: "%DOWNSTREAM_REMOTE_ADDRESS%"
              requested_server_name: "%REQUESTED_SERVER_NAME%"
              route_name: "%ROUTE_NAME%"
          sinks:
            - type: File
              file:
                path: /dev/stdout
            - type: OpenTelemetry
              openTelemetry:
                host: otel-collector.monitoring.svc.cluster.local
                port: 4317
                resources:
                  k8s.cluster.name: "cluster1"
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: backend
spec:
  parentRefs:
    - name: eg
  rules:
    - backendRefs:
        - group: ""
          kind: Service
          name: httpbin
          port: 8000
      matches:
        - path:
            type: PathPrefix
            value: /

error message:

[2025-07-03 10:36:19.779][1][warning][config] [source/extensions/config_subscription/grpc/delta_subscription_state.cc:296] delta config for type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment rejected: malformed IP address: otel-collector.monitoring.svc.cluster.local. Consider setting resolver_name or setting cluster type to 'STRICT_DNS' or 'LOGICAL_DNS'
[2025-07-03 10:36:19.779][1][warning][config] [source/extensions/config_subscription/grpc/grpc_subscription_impl.cc:138] gRPC config for type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment rejected: malformed IP address: otel-collector.monitoring.svc.cluster.local. Consider setting resolver_name or setting cluster type to 'STRICT_DNS' or 'LOGICAL_DNS'
[2025-07-03 10:36:19.779][1][warning][config] [source/extensions/config_subscription/grpc/grpc_subscription_impl.cc:138] gRPC config for type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment rejected: malformed IP address: otel-collector.monitoring.svc.cluster.local. Consider setting resolver_name or setting cluster type to 'STRICT_DNS' or 'LOGICAL_DNS'