Deployment

A Deployment manages Pods and ensures they run correctly.

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• Creates Pods
• Maintains number of replicas
• Handles updates (rolling update)
• Supports rollback

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You define:

replicas: 3 image: nginx

Kubernetes ensures:

• 3 pods always running
• Replace failed pods automatically

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Deployment = “manager of workers”

It ensures:

• Enough workers exist
• Workers are updated safely

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You never manage Pods directly in production. You manage Deployments instead.