https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/
https://metallb.universe.tf/installation/
https://kubernetes.io/docs/concepts/services-networking/service/
https://doc.traefik.io/traefik/v2.8/user-guides/crd-acme/

https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs/guides/getting-started