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.  |