Table of Contents

Scheduler

The Scheduler decides which node runs a pod.

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How it works

When a new pod is created: 

1. Scheduler sees the pod request
2. Checks all available nodes
3. Evaluates CPU, memory, constraints
4. Picks the best node
5. Assigns the pod

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Example

You create a pod:

nginx pod (needs 200m CPU)

Nodes:

Node A → low CPU Node B → high CPU (selected)

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Key idea

Scheduler = “decision maker” It only decides placement, not execution.