kpt-grpc-demo/google/maps/roads/v1op/roads_grpc_service_config.json

{
  "methodConfig": [{
    "name": [{ "service": "google.maps.roads.v1op.RoadsService" }],
    "timeout": "60s",
    "retryPolicy": {
      "maxAttempts": 5,
      "initialBackoff": "1s",
      "maxBackoff": "60s",
      "backoffMultiplier": 1.3,
      "retryableStatusCodes": ["UNAVAILABLE", "UNKNOWN"]
    }
  }
 ]
}