April 2, 2025 · AzureIn preview
Public Preview: maxUnavailable Setting for Upgrades in AKS
AKS now supports setting a maxUnavailable option for upgrading nodepools to a newer version of both Kubernetes and node images. With maxUnavailable, you no longer need to use surge nodes to begin the upgrade process. AKS will instead simply cordon and drain existing nodes on the nodepool.