Control plane contoller doesn't react on machineTemplate ref changes

[makhov]

What happened?

If the machineTemplate reference changes, k0smotron doesn't do anything.

Involved Areas

No response

What did you expect to happen?

k0smotron should create new machines and remove old ones

Steps to reproduce

• Deploy a K0sControlPlane cluster
• Change the machineTemplate reference

k0smotron version

v1.2.0 and below

k0s version

any

Anything else we need to know?

No response

[camusdv]

Changing VSphereMachineTemplate object reference in MachineDeployment object is applied. Thus worker nodes are able to be recreated with the updated flavor.

Changing VSphereMachineTemplate object reference in K0sControlPlane object is ignored. This control plane nodes are not recreated with the updated flavor.

There is a work-around by applying a K0s version upgrade with K0sControlPlane created with spec.updateStrategy=Recreate - https://docs.k0smotron.io/stable/update/update-capi-cluster/#updating-the-control-plane-using-the-cluster-api-workflow.