You can upgrade existing containers using the Administrative Console or the virtaupgrade CLI command.
Containers that require upgrading are indicated in Administrative Console by the label "Needs Upgrade".
When you upgrade a container, a backup folder is created in the container folder. Test the upgraded container and then delete the backup folder when you are satisfied that the container is running correctly.
To Upgrade a Container
In the Administrative Console, select the container that requires upgrading.
Select Upgrade in the toolbar. The status of the appliance changes to "Undocked". You can now select and dock the upgraded container.