====== Cluster Architecture ======

Kubernetes cluster architecture is the overall design of how Kubernetes is built.

A cluster is split into two main parts:
  * Control Plane (brain)
  * Worker Nodes (workers)

---

===== Simple flow =====


User request
↓
API Server (Control Plane)
↓
Scheduler decides node
↓
Worker Node runs Pod


---

===== Real-world example =====

You deploy a web app:

  * You want 3 replicas of your app
  * Kubernetes distributes them across multiple nodes
  * If a node fails → pods move to another node

---

===== Key idea =====

Cluster = a group of machines working together:
  * Some decide (Control Plane)
  * Some execute (Worker Nodes)