How much room is actually left on that k8s node?

Michal Marszalek — Mon, 31 Aug 2026 19:34:03 +0000

I spent a lot of time optimizing autoscaling on a GKE cluster at my previous company. During that process, I realized no tools were available to visualize how the Kubernetes scheduler perceives cluster nodes something that could help explain why a pod gets assigned to one node over another.

So, I created a simple Python application to visualize requested resources in a Kubernetes cluster. And that’s how k8sfoams was born.
It's a local, read-only dashboard that reads your ~/.kube/config, pulls node capacity and pod resource requests, and draws your cluster as a treemap: one box per node, one foam per pod, containers nested inside, and space where the free capacity actually is. No in-cluster deployment. No metrics-server.
One pip install.
pip install k8sfoams

It supports CPU or memory visualization on a 2D view.

Or both in 3D view.

It's rendered in pure CSS 3D, so no WebGL and no GPU required.
Check out the repository and let me know your thoughts:

Your Helm Tests Are Green. That Doesn’t Mean They’re Testing Anything.

Michal Marszalek — Mon, 31 Aug 2026 19:07:14 +0000

As a software engineer, I was always fascinated by many aspects of software engineering. Once, my college team told me about mutation tests. A test that tests not the code, but how good your tests are. At that time, I started using Stryker, a mutation framework for C#. As I started writing plenty of Helm unit tests for a Helm chart, I realized creating a tool for Helm unit tests might be a good idea. And here it is

Why give it a try?
Validates test quality: Finds blind spots in your Helm chart assertions.
Seamless integration: Built specifically to work with helm-unittest.
Higher confidence: Catches silent configuration bugs before production.

More examples and a brief description you will find in this article

Check out the repository and let me know what you think.

DEV Community: Michal Marszalek

How much room is actually left on that k8s node?

Your Helm Tests Are Green. That Doesn’t Mean They’re Testing Anything.