Welcome to the Core Objects module. In this module, we will explore the fundamental primitives used to deploy and manage workloads in a Kubernetes cluster.

By the end of this module, you will understand how to structure applications for high availability, zero-downtime updates, and secure multi-tenant isolation.

Chapter Roadmap

  1. Pods Deep Dive Understand the atomic unit of Kubernetes. Learn why Pods exist, what the Pause Container does, and multi-container patterns (Sidecars, InitContainers).

  2. ReplicaSets Discover how Kubernetes maintains high availability. We break down the reconciliation control loop and how the Desired State dictates the Current State.

  3. Deployments & Strategies Master application lifecycles. Learn how Deployments orchestrate ReplicaSets to perform zero-downtime Rolling Updates, Recreates, and instantaneous Rollbacks.

  4. Namespaces Learn how to logically partition clusters to isolate resources, manage teams, and safely enforce multi-tenant environments.

  5. Labels and Selectors Explore the metadata engine of Kubernetes. Understand how objects are loosely coupled and queried using set-based and equality-based matching.

  6. Module Review Test your knowledge with flashcards, a comprehensive cheat sheet, and a quick revision guide before moving on to the next module.

Module Chapters

Chapter 01

Pods Deep Dive

1. Why not just run Containers? Docker runs Containers. Kubernetes runs Pods. A Pod represents a single instance of a running process in your cluster....

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Chapter 03

Deployments & Strategies

1. The Logic Hierarchy You rarely create Pods directly. You create Deployments. Deployment: Manages Releases (Updates, Rollbacks). ReplicaSet: Manages Scale (Ensures N copies are running)....

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