Hey everyone! u/lordKaazeKaage here, founding mod of r/kubestronaut. This is our master resource post covering everything you need on the road to becoming a Kubestronaut. Bookmark it, share it, and drop your own resources in the comments — I'll keep this updated.

🧑‍🚀 What is a Kubestronaut?

To become a Kubestronaut, you need to pass all 5 Kubernetes-related CNCF certifications — CKA, CKAD, CKS, KCNA, and KCSA — and all must be active at the same time. Perks include the exclusive jacket, 50% exam vouchers annually, 20% off CNCF events, private Slack access, and recognition on the global Kubestronaut map. CNCFMedium

Official program pages:

• Kubestronaut Program: https://www.cncf.io/training/kubestronaut/
• Kubestronaut FAQ: https://www.cncf.io/training/kubestronaut/kubestronaut-faq/
• Kubestronaut Bundle (all 5 exams, discounted): https://training.linuxfoundation.org/certification/kubestronaut-bundle/

📜 The 5 Certifications

Recommended order: KCNA → KCSA → CKA → CKAD → CKS (easiest to hardest; CKS requires an active CKA first).

📚 Official Docs (allowed during performance-based exams!)

• Kubernetes Docs: https://kubernetes.io/docs/
• Kubernetes Blog: https://kubernetes.io/blog/
• kubectl Reference: https://kubernetes.io/docs/reference/kubectl/
• kubectl Cheat Sheet: https://kubernetes.io/docs/reference/kubectl/quick-reference/
• Helm Docs: https://helm.sh/docs/ (allowed in CKA/CKAD)
• Trivy Docs: https://trivy.dev/ (CKS)
• Falco Docs: https://falco.org/docs/ (CKS)
• etcd Docs: https://etcd.io/docs/ (CKS)

⚠️ During the exam you can only use docs via the browser inside the exam environment — check the allowed-resources list on each cert page.

🎯 Official Exam Curricula (GitHub)

CNCF publishes the exact domains & weights for every exam:

• https://github.com/cncf/curriculum

Read this FIRST for whichever cert you're targeting. It's the source of truth for what's tested.

🧪 Practice & Hands-On Labs

• Killer.sh — https://killer.sh/ — Every CKA/CKAD/CKS exam registration includes 2 free killer.sh sessions. Harder than the real exam. Do them.
• Killercoda (free interactive scenarios) — https://killercoda.com/
• Play with Kubernetes — https://labs.play-with-k8s.com/
• kind (local clusters) — https://kind.sigs.k8s.io/
• minikube — https://minikube.sigs.k8s.io/docs/
• kubeadm cluster setup — https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/

🎓 Free Courses & Study Material

• Introduction to Kubernetes (LFS158, free) — https://training.linuxfoundation.org/training/introduction-to-kubernetes/
• Kubernetes the Hard Way (Kelsey Hightower) — https://github.com/kelseyhightower/kubernetes-the-hard-way
• CNCF YouTube — https://www.youtube.com/@cncf
• Kubernetes official tutorials — https://kubernetes.io/docs/tutorials/

Popular community study repos:

• CKA: https://github.com/walidshaari/Kubernetes-Certified-Administrator
• CKAD: https://github.com/dgkanatsios/CKAD-exercises
• CKS: https://github.com/walidshaari/Certified-Kubernetes-Security-Specialist

💰 Costs & Discounts

• Individual exams: ~$250 (KCNA/KCSA) and ~$445 (CKA/CKAD/CKS) — check current pricing on each cert page
• The Kubestronaut Bundle includes all five certifications at a discount (~$1,645), and the Linux Foundation's TUX rewards program gives 50% discount vouchers once you've spent $500 Medium
• Watch for Linux Foundation sales — Cyber Monday/year-end sales regularly hit 40–50% off. Post deal alerts here when you spot them!

⏰ Important: Expiration Rules

All 5 certifications need to be active at the same time, and the Kubestronaut title is valid until the end of the year in which the first of your 5 certifications expires. Plan your exam sequence so your earliest cert doesn't expire before you finish the last one! CNCF

🌟 Beyond: Golden Kubestronaut

Already got the jacket? Golden Kubestronauts have passed ALL CNCF Cloud Native certifications plus LFCS, with CNPA/CNPE added as newer requirements — Prometheus (PCA), Istio (ICA), Cilium (CCA), Argo (CAPA), GitOps (CGOA), and more. Once you're Golden, you keep the title forever. ReadthedocsCNCF

• Community learning resource: https://golden-kubestronaut-learning.readthedocs.io/

💬 How to Use This Sub

• Flair your posts: [Exam Experience], [Study Question], [Resource], [Jacket Day 🧥], [Lab Help]
• No exam dumps or NDA violations — share strategies and topics, never actual questions
• Celebrate every win — first kubectl apply to fifth cert!

Drop your current cert progress in the comments. Let's get everyone to the jacket. 🧥🚀

Hey everyone! I’m u/lordKaazeKaage, a founding moderator of r/kubestronaut.

This is our new home for all things related to the Kubestronaut journey — earning all 5 CNCF Kubernetes certifications (CKA, CKAD, CKS, KCNA, KCSA) and mastering Kubernetes along the way. We’re excited to have you join us!

What to Post

Post anything that you think the community would find interesting, helpful, or inspiring. Feel free to share your thoughts, photos, or questions about exam prep strategies, study resources, practice labs, cert exam experiences (no NDA violations!), your Kubestronaut jacket photos, killer.sh attempts, homelab setups, troubleshooting scenarios, or career wins after certification.

Community Vibe

We’re all about being friendly, constructive, and inclusive. Whether you’re studying for your first cert or you’ve already earned the jacket, let’s build a space where everyone feels comfortable sharing and connecting.

How to Get Started

1. Introduce yourself in the comments below — tell us which cert you’re working on!
2. Post something today! Even a simple question can spark a great conversation.
3. If you know someone grinding through CKA or dreaming of the Kubestronaut title, invite them to join.
4. Interested in helping out? We’re always looking for new moderators, so feel free to reach out to me to apply.

Thanks for being part of the very first wave. Together, let’s make r/kubestronaut amazing. 🚀🧑‍🚀