OpenShift Container Platform

Enable feature sets at installation

You can enable feature sets for all nodes in the cluster by editing the install-config.yaml file before you deploy the cluster. This allows you to use non-default features in your cluster.

Prerequisites

You have an install-config.yaml file.

Procedure

Use the featureSet parameter to specify the name of the feature set you want to enable, such as TechPreviewNoUpgrade:

Enabling the TechPreviewNoUpgrade feature set on your cluster cannot be undone and prevents minor version updates. You should not enable this feature set on production clusters.
Sample install-config.yaml file with an enabled feature set
```
compute:
- hyperthreading: Enabled
  name: worker
  platform:
    aws:
      rootVolume:
        iops: 2000
        size: 500
        type: io1
      metadataService:
        authentication: Optional
      type: c5.4xlarge
      zones:
      - us-west-2c
  replicas: 3
featureSet: TechPreviewNoUpgrade
```
Save the file and reference it when using the installation program to deploy the cluster.

Verification

You can verify that the feature gates are enabled by looking at the kubelet.conf file on a node after the nodes return to the ready state.

From the Administrator perspective in the web console, navigate to Compute → Nodes.
Select a node.
In the Node details page, click Terminal.
In the terminal window, change your root directory to /host:
```
sh-4.2# chroot /host
```
View the kubelet.conf file:
```
sh-4.2# cat /etc/kubernetes/kubelet.conf
```
Sample output
```
# ...
featureGates:
  InsightsOperatorPullingSCA: true,
  LegacyNodeRoleBehavior: false
# ...
```
The features that are listed as true are enabled on your cluster.

The features listed vary depending upon the OpenShift Container Platform version.