In-place updates with Kubeadm and OpenStack

[Nils98Ar]

I've already looked into this, but I haven't been able to fully understand the current state.

We are using:

• Kubeadm Bootstrap Provider
• Kubeadm Control Plane Provider
• OpenStack Infrastructure Provider

With the latest versions of CAPI and these providers + InPlaceUpdates feature flag enabled in CAPI, are the following operations supported for both control plane and worker nodes already?

• In-place Kubernetes version upgrades (for example, from 1.34 to 1.35)
• In-place flavor changes (CPU, memory, root disk)

If not, what is missing, and where would the necessary changes need to be implemented (e.g., Cluster API core, KCP, or the infrastructure provider)?

Our primary use case is to improve support for running larger database clusters on Kubernetes with local storage, where minimizing node replacements is essential to avoid frequent re-syncs (e.g. Galera or PostgreSQL clusters).

Thank you!