azurerm_kubernetes_cluster: Support for upgrade path from Azure CNI to Azure CNI Overlay

[jkroepke]

Is there an existing issue for this?

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Description

Azure fully supports migrate from Azure CNI to Azure CNI Overlay. Unlike Azure CNI, Azure CNI Overlay requires an pod_cidr, but changing pod_cidr forces a new cluster.

New or Affected Resource(s)/Data Source(s)

azurerm_kubernetes_cluster

Potential Terraform Configuration

No response

References

• https://learn.microsoft.com/en-us/azure/aks/azure-cni-overlay?tabs=kubectl#upgrade-an-existing-cluster-to-cni-overlay