New branch for Proxmox/KVM procedure and with updated components (Kubernetes 1.18.4, ...)

[ghost]

Hello,

I adapted the tutorial so that it could be used on a Proxmox (KVM) architecture and updated some components installed in the tutorial. I think it can be a good idea to create a new branch dedicated to Proxmox (and/or KVM) architecture.

This includes a network architecture diagram.

Versions change:

• Kubernetes (kube-apiserver, kube-controller-manager, kube-scheduler and kubectl) : 1.15.3 -> 1.18.4
• containerd : 1.2.9 -> 1.3.4
• cni-plugins : v0.8.2 -> v0.8.5
• etcd : v3.4.0 -> v3.4.9
• cri-tools : 1.15.0 -> 1.17.0

Some other minor updates has been integrated.

To choose the versions more easily I used the following release notes : https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.18.md#v1184

I tested this tutorial adaptation multiple times (and lots of minor specific debug tests carried out during the adaptation).

Don't hesitate if you have any questions or comments.

nemosupinfo ("n.hauducSUPINFO/Wirebrass" that we can see in the commits is one of my other GitHub accounts).

[kelseyhightower]

I just don't have the bandwidth to maintain or review more than one provider for this guide. I've encourage people to create their own forks for this use case.