MOHAMMAD SHAKER
← 40 Days of Kubernetes
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CKA Course Intro & Roadmap

Video: FREE Kubernetes Full Course (Day 0/40) — CKA Tutorial + Roadmap • https://www.youtube.com/watch?v=6_gMoe7Ik8k • Duration: ~12 min

Key terms

TermMeaning
CKACertified Kubernetes Administrator — the hands-on exam for cluster operators
K8sShorthand for Kubernetes (K + 8 letters + s)
CNCFCloud Native Computing Foundation — the body behind Kubernetes and the CKA
ClusterA set of machines managed together by Kubernetes
NodeA single machine (control-plane or worker) in a cluster
kubectlThe Kubernetes command-line client

Problem & solution

Kubernetes is huge and the CKA is a hands-on, performance-based exam, so unstructured studying wastes time and leaves dangerous gaps. Learners need a clear roadmap and accurate expectations of the exam format before diving in.

Solution: Follow the 40-day path in order, Docker basics first, then core objects, scheduling, security, cluster ops, and troubleshooting, practicing hands-on each day toward the CKA.

The analogy

Earning a harbor-master license is never a weekend cram: you start as an apprentice learning cargo basics and work up through staged duties until you can run the whole port. Each rank is signed off only after real hands-on shifts on the docks, not a multiple-choice quiz. The CKA is the same kind of credential: a learner follows the staged 40-day path and proves mastery through hands-on kubectl practice on a live cluster, ending at the performance-based exam.

Goal of this video

Set expectations for the 40 Days of Kubernetes challenge and explain the path to passing the CKA (Certified Kubernetes Administrator) exam.

What is the CKA exam?

  • Hands-on, performance-based exam (you operate a real cluster, no MCQs).
  • ~2 hours, 15–20 tasks, run on a live terminal.
  • Passing score ~66%. Open book: only kubernetes.io/docs allowed.
  • Tests you on real kubectl speed, YAML authoring, and troubleshooting.

The 40-Day learning path (ASCII map)

The challenge groups the syllabus into five phases that build on each other, from containers up through storage and ops.

                         40 DAYS OF KUBERNETES
                         =====================

  PHASE 1: CONTAINERS (Day 1-3)
  +-----------------------------------------------+
  | Docker basics -> Dockerize app -> Multi-stage  |
  +-----------------------------------------------+
                         |
                         v
  PHASE 2: K8S CORE (Day 4-13)
  +-----------------------------------------------+
  | Why K8s -> Architecture -> Cluster setup ->    |
  | Pods -> Deployments -> Services -> Namespaces  |
  | -> Multi-container -> DaemonSet/Job            |
  +-----------------------------------------------+
                         |
                         v
  PHASE 3: SCHEDULING & CONFIG (Day 13-19)
  +-----------------------------------------------+
  | Static pods -> Taints -> Affinity -> Requests  |
  | /Limits -> Autoscaling -> Probes -> ConfigMap  |
  +-----------------------------------------------+
                         |
                         v
  PHASE 4: SECURITY (Day 20-26)
  +-----------------------------------------------+
  | TLS -> Certs -> AuthN/AuthZ -> RBAC ->         |
  | ServiceAccounts -> Network Policies            |
  +-----------------------------------------------+
                         |
                         v
  PHASE 5: STORAGE, NET, OPS (Day 27-40)
  +-----------------------------------------------+
  | kubeadm -> Volumes/PV/PVC -> DNS/CoreDNS ->    |
  | CNI -> Ingress -> Upgrade -> etcd backup ->    |
  | Logging -> Troubleshooting -> JSONPath -> Exam |
  +-----------------------------------------------+

How to study (per day)

  1. Watch the video.
  2. Read the matching doc here.
  3. Reproduce every command in your own cluster.
  4. Do the assignment / post notes publicly (#40daysofkubernetes).

Prerequisites to install

  • Docker Desktop (or Docker Engine on Linux)
  • kubectl
  • kind (Kubernetes IN Docker) for a local multi-node cluster

After installing all three, run these commands to confirm each tool is on your PATH and prints a version.

# verify after install
docker --version
kubectl version --client
kind --version

End-to-end flow

The whole challenge is one path: each phase builds on the last, ending at the CKA exam.

Key takeaways

  • CKA = practice, not memorization. Build muscle memory with kubectl.
  • Master Docker first; Kubernetes orchestrates containers.
  • Learn to navigate kubernetes.io/docs fast (you get it during the exam).

Checklist

  • [ ] Tools installed and verified
  • [ ] Understand exam format (hands-on, 2h, docs allowed)
  • [ ] Committed to the 40-day plan