A ReplicaSet ensures a specific number of Pods are running.

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• Keeps N copies of a Pod running
• Replaces failed Pods automatically

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replicas: 3

If one Pod crashes:

Before: 3 pods After: 3 pods (1 recreated)

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Deployment → creates ReplicaSet → manages Pods

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ReplicaSet = “worker counter”

It ensures:

• You always have the required number of workers