---
reviewers:
- luxas
- jbeda
title: kubeadm alpha
content_type: concept
weight: 90
---

{{< caution >}}
`kubeadm alpha` provides a preview of a set of features made available for gathering feedback
 from the community. Please try it out and give us feedback!
{{< /caution >}}

## kubeadm alpha certs renew {#cmd-certs-renew}

You can renew all Kubernetes certificates using the `all` subcommand or renew them selectively.
For more details about certificate expiration and renewal see the [certificate management documentation](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/).

{{< tabs name="tab-certs-renew" >}}
{{< tab name="renew" include="generated/kubeadm_alpha_certs_renew.md" />}}
{{< tab name="all" include="generated/kubeadm_alpha_certs_renew_all.md" />}}
{{< tab name="admin.conf" include="generated/kubeadm_alpha_certs_renew_admin.conf.md" />}}
{{< tab name="apiserver-etcd-client" include="generated/kubeadm_alpha_certs_renew_apiserver-etcd-client.md" />}}
{{< tab name="apiserver-kubelet-client" include="generated/kubeadm_alpha_certs_renew_apiserver-kubelet-client.md" />}}
{{< tab name="apiserver" include="generated/kubeadm_alpha_certs_renew_apiserver.md" />}}
{{< tab name="controller-manager.conf" include="generated/kubeadm_alpha_certs_renew_controller-manager.conf.md" />}}
{{< tab name="etcd-healthcheck-client" include="generated/kubeadm_alpha_certs_renew_etcd-healthcheck-client.md" />}}
{{< tab name="etcd-peer" include="generated/kubeadm_alpha_certs_renew_etcd-peer.md" />}}
{{< tab name="etcd-server" include="generated/kubeadm_alpha_certs_renew_etcd-server.md" />}}
{{< tab name="front-proxy-client" include="generated/kubeadm_alpha_certs_renew_front-proxy-client.md" />}}
{{< tab name="scheduler.conf" include="generated/kubeadm_alpha_certs_renew_scheduler.conf.md" />}}
{{< /tabs >}}

## kubeadm alpha certs certificate-key {#cmd-certs-certificate-key}

This command can be used to generate a new control-plane certificate key.
The key can be passed as `--certificate-key` to `kubeadm init` and `kubeadm join`
to enable the automatic copy of certificates when joining additional control-plane nodes.

{{< tabs name="tab-certs-certificate-key" >}}
{{< tab name="certificate-key" include="generated/kubeadm_alpha_certs_certificate-key.md" />}}
{{< /tabs >}}

## kubeadm alpha certs check-expiration {#cmd-certs-check-expiration}

This command checks expiration for the certificates in the local PKI managed by kubeadm.
For more details about certificate expiration and renewal see the [certificate management documentation](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/).

{{< tabs name="tab-certs-check-expiration" >}}
{{< tab name="check-expiration" include="generated/kubeadm_alpha_certs_check-expiration.md" />}}
{{< /tabs >}}

## kubeadm alpha kubeconfig user {#cmd-phase-kubeconfig}

The `user` subcommand can be used for the creation of kubeconfig files for additional users.

{{< tabs name="tab-kubeconfig" >}}
{{< tab name="kubeconfig" include="generated/kubeadm_alpha_kubeconfig.md" />}}
{{< tab name="user" include="generated/kubeadm_alpha_kubeconfig_user.md" />}}
{{< /tabs >}}

## kubeadm alpha kubelet config {#cmd-phase-kubelet}

Use the following command to enable the DynamicKubeletConfiguration feature.

{{< tabs name="tab-kubelet" >}}
{{< tab name="kubelet" include="generated/kubeadm_alpha_kubelet.md" />}}
{{< tab name="enable-dynamic" include="generated/kubeadm_alpha_kubelet_config_enable-dynamic.md" />}}
{{< /tabs >}}

## kubeadm alpha selfhosting pivot {#cmd-selfhosting}

The subcommand `pivot` can be used to convert a static Pod-hosted control plane into a self-hosted one.

[Documentation](/docs/setup/production-environment/tools/kubeadm/self-hosting/)

{{< tabs name="selfhosting" >}}
{{< tab name="selfhosting" include="generated/kubeadm_alpha_selfhosting.md" />}}
{{< tab name="pivot" include="generated/kubeadm_alpha_selfhosting_pivot.md" />}}
{{< /tabs >}}

## {{% heading "whatsnext" %}}

* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node
* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster
* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`