What's the best strategy for upgrading kubernetes version? In our case we're using AKS and we've previously been using terraform, where we just switch the version and nodes with the new version is deployed, pods are moved over the old node is taken down - so really nice and simple. We're currently using azure native and the only thing that gets upgraded is the kubernetes version of the cluster. None of the nodes are updated and trying to update the node pools gives us misc errors. Is it better to use azure classic for this? Since it's based on terraform I assume that will work in the same way as our old terraform code?

You can replicate the process you had with terraform using azure classic yes

Tried this out and can confirm the azure classic package does automatic node updates. Thanks!