read / write
The most disruptive action that you want to perform on each instance during the update:
- REPLACE: Delete the instance and create it again.
- RESTART: Stop the instance and start it again.
- REFRESH: Do not stop the instance.
- NONE: Do not disrupt the instance at all. By default, the most disruptive allowed action is REPLACE. If your update requires a more disruptive action than you set with this flag, the update request will fail. Possible string values are: