certified-kubernetes-administrator-course

This repository holds the companion notes for a Certified Kubernetes Administrator (CKA) course offered by KodeKloud. Kubernetes is a system for running and managing containerized applications at scale, and the CKA is an industry certification that tests whether you can operate it in production. The notes in this repo track the video course closely and are organized as linked markdown files you can browse on GitHub.

The content is divided into numbered sections that mirror the course structure. Early sections cover core concepts: how a Kubernetes cluster is put together, what each component does (the API server, the scheduler, the proxy layer, and so on), and how individual application containers are packaged and run. Each topic comes with a corresponding practice test that points back to exercises hosted on the KodeKloud platform.

Later sections go deeper into areas the exam tests heavily. Scheduling covers how Kubernetes decides which machine runs which workload, including labels, resource limits, and policies that affect placement. Application lifecycle covers how you update a running app without downtime, how to pass configuration and secrets into containers, and how to handle startup dependencies. Cluster maintenance covers upgrading the cluster software, taking backups, and restoring from them.

The final sections address security (certificates, role-based access, network policies), storage (how persistent data is attached to containers), networking (how traffic routes between services and across nodes), and the kubectl command-line tool used for everything. There is also a section on troubleshooting common cluster and application failures, which is a significant part of the actual exam.

This repo is a study aid, not a standalone tutorial. It is most useful alongside the KodeKloud video course, where the practice environments live. If you are preparing for the CKA exam, the structured section order and the links to practice tests make it a practical reference to keep open while you work through the material.