node-feature-discovery/deployment/nodefeaturerule/samples/nodefeaturerule-kernel.yaml

#
# This NodeFeatureRule replicates all built-in kernel feature labels of NFD.
#
apiVersion: nfd.k8s-sigs.io/v1alpha1
kind: NodeFeatureRule
metadata:
  name: nfd-builtin-kernel-features
spec:
  rules:
    - name: "nfd built-in kernel-version labels"
      labelsTemplate: |
        {{ range .kernel.version }}kernel-version.{{ .Name }}={{ .Value }}
        {{ end }}        
      matchFeatures:
        - feature: kernel.version
          matchName:
            op: Exists

    - name: "nfd built-in kernel-config labels"
      labelsTemplate: |
        {{ range .kernel.config }}kernel-config.{{ .Name }}=true
        {{ end }}        
      matchFeatures:
        - feature: kernel.config
          matchExpressions:
            "NO_HZ": {op: In, value: ["y"]}
            "NO_HZ_IDLE": {op: In, value: ["y"]}
            "NO_HZ_FULL": {op: In, value: ["y"]}
            "PREEMPT": {op: In, value: ["y"]}

    - name: "nfd built-in kernel-selinux labels"
      labels:
        "kernel-selinux.enabled": "true"
      matchFeatures:
        - feature: kernel.selinux
          matchExpressions:
            "enabled":
              op: IsTrue