AKS Learn feedback:

[porrascarlos802018]

Type of issue

Missing information

Feedback

Consider adding this scenario clarification for customers:

Lets say I started to upgrade my cluster AKS node image to ubuntu20250805 version but the duration window I specified was too short, only 1 nodepool got updated to ubuntu20250805 and 2 additional nodepools were pending to be upgraded. The next time the upgrade triggers , the version that was being processed ubuntu20250805 its pending to be applied to 2 nodepools, but there is a newer image that got released lets say version ubuntu20250820 . What is going to happen with the pending nodepools, will the upgrade process apply the ubuntu20250805 first to the pending nodepools, and later start processing the 3 nopdepools with the newer image ubuntu20250820 if the duration time allows for it?

info:
If a node pool upgrade was interrupted due to time constraints, AKS will resume the upgrade with the previously selected image version (ubuntu20250805) during the next maintenance window

AKS does not automatically override a pending upgrade with a newer image.

Page URL

https://learn.microsoft.com/en-us/azure/aks/planned-maintenance?tabs=azure-cli

Content source URL

https://github.com/MicrosoftDocs/azure-aks-docs/blob/main/articles/aks/planned-maintenance.md

Author

@kaarthis

Document Id

880da085-1b0a-6475-8c88-19131e5eee2a

Platform Id

4c8669f2-c6c1-5dd4-2de4-86895dd8b633