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docs: better document differences between deployment methods
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Node Feature Discovery Helm chart allow to easily deploy and manage NFD.
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> NOTE: NFD is not ideal for other Helm charts to depend on as that may result
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> in multiple parallel NFD deployments in the same cluster which is not fully
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> supported by the NFD Helm chart.
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## Prerequisites
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[Helm package manager](https://helm.sh/) should be installed.
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# Deployment
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Deployment instructions.
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See [Image variants](image-variants) for description of the different NFD
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container images available.
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[Using Kustomize](kustomize) provides straightforward deployment with
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`kubectl` integration and declarative customization.
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[Using Helm](helm) provides easy management of NFD deployments with nice
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configuration management and easy upgrades.
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[Using Operator](operator) provides deployment and configuration management via
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CRDs.
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---
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This deployment method requires
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[Kustomize](https://github.com/kubernetes-sigs/kustomize) provides easy
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deployment of NFD. Customization of the deployment is done by maintaining
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declarative overlays on top of the base overlays in NFD.
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To follow the deployment instructions here,
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[kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl) v1.21 or
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later. The kustomize overlays provided in the repo can be used directly:
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later is required.
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The kustomize overlays provided in the repo can be used directly:
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```bash
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kubectl apply -k https://github.com/kubernetes-sigs/node-feature-discovery/deployment/overlays/default?ref={{ site.release }}
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---
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The [Node Feature Discovery Operator][nfd-operator] automates installation,
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configuration and updates of NFD using a specific NodeFeatureDiscovery custom
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resource. This also provides good support for managing NFD as a dependency of
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other operators.
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## Deployment
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Deployment using the
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