UpgradeEvent is a notification sent to customers by the cluster server when a resource is upgrading.
| JSON representation | 
|---|
| {
  "resourceType": enum ( | 
| Fields | |
|---|---|
| resourceType | 
 The resource type that is upgrading. | 
| operation | 
 The operation associated with this upgrade. | 
| operationStartTime | 
 The time when the operation was started. Uses RFC 3339, where generated output will always be Z-normalized and use 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples:  | 
| currentVersion | 
 The current version before the upgrade. | 
| targetVersion | 
 The target version for the upgrade. | 
| resource | 
 Optional relative path to the resource. For example in node pool upgrades, the relative path of the node pool. |