Break out kubernetes package installation and kubeadm invocation
to two different steps, so that we can install kubernetes packages
without setting up the cluster (for the new DMUC labs).
We now go from 1.22 to 1.23.
Updating to 1.22 was necessary because Kubernetes 1.27
deprecated kubeadm config v1beta2, which forced us to
upgrade to v1beta3, which was only introduced in 1.22.
In other words, our scripts can only install Kubernetes
1.22+ now.
Kube No Trouble (kubent) is a simple tool to check whether you're using any of these API versions in your cluster and therefore should upgrade your workloads first, before upgrading your Kubernetes cluster.
v1beta2 support was removed in Kubernetes 1.27.
Warning, v1beta3 was introduced in Kubernetes 1.22
(I think?) which means that the minimum version for
"old cluster" deployments is now 1.22.
They're not valid anymore, and fixing them would require quite a lot of
work, since we drastically changed the way we provision things. I'm
removing them rather than leaving a completely broken thing.
Summary of changes:
- "workshopctl" is now "labctl"
- it can handle deployment of VMs but also of managed
Kubernetes clusters (and therefore, it replaces
the "prepare-tf" directory)
- support for many more providers has been added
Check the README.md, in particular the "directory structure";
it has the most important information.
