Node Feature Discovery

# Feature Gates

Feature gates are a set of key-value pairs that control the behavior of NFD. They are used to enable or disable certain features of NFD. The feature gates are set using the `-feature-gates` command line flag or `featureGates` value in the Helm chart. The following feature gates are available:

Name | Default | Stage | Since | Until
--- | --- | --- | --- | ---
`NodeFeatureAPI` | true | Beta | V0.14 |
`DisableAutoPrefix` | false | Alpha | V0.16 |
`NodeFeatureGroupAPI` | false | Alpha | V0.16 |

## NodeFeatureAPI

The `NodeFeatureAPI` feature gate enables the Node Feature API. When enabled, NFD will register the Node Feature API with the Kubernetes API server. The Node Feature API is used to expose node-specific hardware and software features to the Kubernetes scheduler. The Node Feature API is a beta feature and is enabled by default.

## NodeFeatureGroupAPI

The `NodeFeatureGroupAPI` feature gate enables the Node Feature Group API. When enabled, NFD will register the Node Feature Group API with the Kubernetes API server. The Node Feature Group API is used to create node groups based on hardware and software features. The Node Feature Group API is an alpha feature and is disabled by default.

## DisableAutoPrefix

The `DisableAutoPrefix` feature gate controls the automatic prefixing of names. When enabled nfd-master does not automatically add the default `feature.node.kubernetes.io/` prefix to unprefixed labels, annotations and extended resources. Automatic prefixing is the default behavior in NFD v0.16 and earlier.

Note that enabling the feature gate effectively causes unprefixed names to be filtered out as NFD does not allow unprefixed names of labels, annotations or extended resources. For example, with the `DisableAutoPrefix` feature gate set to `false`, a NodeFeatureRule with

      labels:
        foo: bar

will turn into `feature.node.kubernetes.io/foo=bar` node label. With `DisableAutoPrefix` set to `true`, no prefix is added and the label will be filtered out.

Note that taint keys are not affected by this feature gate.

Node Feature Discovery
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This Software is under the terms of Apache License 2.0.