Scaling to 21 Nodes Across 3 Datacenters With Terraform and Ansible

INTRODUCTION:

The Evolution of an Empire

Most homelabs start as experiments — a single node, a few containers, and a steep learning curve. Mine stopped being a project the moment it evolved into a 21‑node, multi‑datacenter powerhouse. With control‑plane nodes stretched across physical zones and specialised worker pools for high‑IOPS databases, GPU‑accelerated AI workloads, and latency‑sensitive apps, the stakes changed. I wasn’t just “running services” anymore; I was operating real infrastructure.

That was the turning point.

For years, kubeadm was my gateway into Kubernetes. It taught me the fundamentals, the internals, and the discipline.…