Golden Kubestronaut 2026: open-source self-hosted practice simulator for CNCF certifications

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A developer built Golden Kubestronaut 2026, a self-hosted practice simulator for the CNCF certification path, after retaking the CKA and wanting one place to practise without paid mock-exam sites. The project is an independent, unaffiliated tool whose questions are original and written against published exam objectives rather than taken from real exams. It includes a Python grading engine, 16 question banks totalling 274 questions (48 hands-on), Markdown curriculum modules, and Docker Compose and Kubernetes deployment options. Hands-on tasks are graded by running shell checks against the user's cluster, giving partial credit, while multiple-choice questions are marked against an answer key. The author acknowledges version one has mislabelled banks, such as Cilium material sitting under the wrong certification codes, and that the labs folder is still empty.

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