terraform-azurerm-aks/NoticeOnUpgradeTov9.0.md

Notice on Upgrade to v9.x

New default value for variable agents_pool_max_surge

variable agents_pool_max_surge now has default value 10%. This change might cause configuration drift. If you want to keep the old value, please set it explicitly in your configuration.

API version for azapi_update_resource resource has been upgraded from Microsoft.ContainerService/managedClusters@2023-01-02-preview to Microsoft.ContainerService/managedClusters@2024-02-01.

After a test, it won't affect the existing Terraform state and cause configuration drift. The upgrade is caused by the retirement of original API.