One of the well-known Istio Standard Metrics. enum: - ALL_METRICS - REQUEST_COUNT - REQUEST_DURATION - REQUEST_SIZE - RESPONSE_SIZE - TCP_OPENED_CONNECTIONS - TCP_CLOSED_CONNECTIONS - TCP_SENT_BYTES - TCP_RECEIVED_BYTES - GRPC_REQUEST_MESSAGES - GRPC_RESPONSE_MESSAGES type: string mode: description: 'Controls which mode of metrics generation is selected: CLIENT and/or SERVER.' enum: - CLIENT_AND_SERVER - CLIENT - SERVER type: string type: object tagOverrides: additionalProperties: properties: operation:...

                 {
                  "envoy_grpc": {
                   "cluster_name": "sds-grpc"
                  }
                 }
                ],
                "set_node_on_first_message_only": true,
                "transport_api_version": "V3"
               },
               "initial_fetch_timeout": "0s",
               "resource_api_version": "V3"
              }
             }