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)

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

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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

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Cluster = a group of machines working together:

• Some decide (Control Plane)
• Some execute (Worker Nodes)