SimKube

Test, experiment with, and optimize your Kubernetes clusters safely!
Join a thriving open-source community shaping the future of Kubernetes performance, reliability, and scalability.

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Why SimKube?

Stop Guessing at your Scale–Simulate it!

Use SimKube to explore and optimize your Kubernetes clusters in a risk-free environment. SimKube is built to help you understand and solve real-world Kubernetes challenges before they hit production.

Follow these three simple steps to get started:

  1. Record traces of events that happen in your production cluster
  2. Use SimKube to create a simulation environment that exactly mimics your production cluster
  3. Replay the event trace in your simulated cluster; make changes to see how the cluster responds!

What’s New in SimKube?

SimKube xray demo

In this version of SimKube, we’ve released SimKube xray, which allows you to dig into a trace file and see what’s going on in your simulation in an intuitive text-based user-interface. Try it out, or watch the video below (there is no sound) for a quick intro!

2.1.0 - 2025-03-28

🚀 Features

  • Fix issues discovered by validation
  • Page up/down navigation keys for skctl xray
  • Annotations in skctl validate include possible patches instead of just affected indices
  • Service_account_missing validation check
  • InsertAt patch location, secondary patch for service_account_missing
  • Secret and configmap envvar validation checks
  • Secret and configmap volume validation checks

🐛 Bug Fixes

  • Misaligned error display in skctl xray
  • Validation serialization to yaml/json
  • Validator debug output
See full changelog