Kubernetes on Simple Enough Blog

Test-Driven Infrastructure: Applying TDD to Infrastructure as Code

Wed, 14 Jan 2026 13:45:30 +0200

Test-Driven Infrastructure

Applying TDD to Infrastructure as Code

Test-Driven Development (TDD) is now well established on the application side.
However, when it comes to infrastructure, many still consider TDD unnecessary, too complex, or unsuitable.

That is a mistake.

TDD applied to infrastructure already exists, often without being named as such. When properly understood, it becomes a major lever for securing, structuring, and evolving a cloud platform.

Karpenter: The Intelligent Autoscaler for EKS

Mon, 24 Nov 2025 11:18:06 +0200

I. What is Karpenter?

Karpenter is an open-source autoscaler for Kubernetes, created by AWS.
Its purpose is to automatically adjust the EC2 node capacity of an EKS cluster based on real workload demand.

In short:

When your cluster is short on resources, Karpenter adds new nodes.
When nodes become unnecessary, it removes them.

But more importantly:

It does this faster, more intelligently, and more efficiently than Kubernetes’ traditional autoscaler (Cluster Autoscaler).