PublicKeysECDSA = "PublicKeysECDSA"
	// RootlessControlPlane is expected to be in alpha in v1.22
	RootlessControlPlane = "RootlessControlPlane"
	// EtcdLearnerMode is expected to be in alpha in v1.27, beta in v1.29
	EtcdLearnerMode = "EtcdLearnerMode"
	// WaitForAllControlPlaneComponents is expected to be alpha in v1.30
	WaitForAllControlPlaneComponents = "WaitForAllControlPlaneComponents"
)

	if isDryRun {
		fmt.Printf("[etcd] Would add etcd member: %s\n", etcdPeerAddress)
	} else {
		klog.V(1).Infof("[etcd] Adding etcd member: %s", etcdPeerAddress)
		if features.Enabled(cfg.FeatureGates, features.EtcdLearnerMode) {
			cluster, err = etcdClient.AddMemberAsLearner(nodeName, etcdPeerAddress)
		} else {
			cluster, err = etcdClient.AddMember(nodeName, etcdPeerAddress)
		}
		if err != nil {
			return err
		}

- `kubeadm`: promoted feature gate `EtcdLearnerMode` to `beta`. Learner mode for
  joining `etcd` members is now enabled by default. ([#120228](https://github.com/kubernetes/kubernetes/pull/120228), [@pacoxu](https://github.com/pacoxu))

- Kube-up now includes `CoreDNS` version `v1.9.3` ([#114279](https://github.com/kubernetes/kubernetes/pull/114279), [@pacoxu](https://github.com/pacoxu))
- Kubeadm: added the experimental (alpha) feature gate `EtcdLearnerMode` that allows etcd members to be joined as learner and only then promoted as voting members ([#113318](https://github.com/kubernetes/kubernetes/pull/113318), [@pacoxu](https://github.com/pacoxu))