Upgrading Windows nodes [page]deterministic

This page explains how to upgrade a Windows node created with kubeadm.

## * Familiarize yourself with [the process for upgrading the rest of your kubeadm cluster](/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade). You will want to upgrade the control plane nodes before upgrading your Windows nodes.

## Upgrading worker nodes

### Upgrade kubeadm

1. From the Windows node, upgrade kubeadm:

```powershell # replace with your desired version curl.exe -Lo <path-to-kubeadm.exe> "https://dl.k8s.io/v/bin/windows/amd64/kubeadm.exe" ```

### Drain the node

1. From a machine with access to the Kubernetes API, prepare the node for maintenance by marking it unschedulable and evicting the workloads:

```shell # replace <node-to-drain> with the name of your node you are draining kubectl drain <node-to-drain> --ignore-daemonsets ```

You should see output similar to this:

``` node/ip-172-31-85-18 cordoned node/ip-172-31-85-18 drained ```

### Upgrade the kubelet configuration

1. From the Windows node, call the following command to sync new kubelet configuration:

```powershell kubeadm upgrade node ```

### Upgrade kubelet and kube-proxy

1. From the Windows node, upgrade and restart the kubelet:

```powershell stop-service kubelet curl.exe -Lo <path-to-kubelet.exe> "https://dl.k8s.io/v/bin/windows/amd64/kubelet.exe" restart-service kubelet ```

2. From the Windows node, upgrade and restart the kube-proxy.

```powershell stop-service kube-proxy curl.exe -Lo <path-to-kube-proxy.exe> "https://dl.k8s.io/v/bin/windows/amd64/kube-proxy.exe" restart-service kube-proxy ```

> Note: If you are running kube-proxy in a HostProcess container within a Pod, and not as a Windows Service, you can upgrade kube-proxy by applying a newer version of your kube-proxy manifests.

### Uncordon the node

1. From a machine with access to the Kubernetes API, bring the node back online by marking it schedulable:

```shell # replace <node-to-drain> with the name of your node kubectl uncordon <node-to-drain> ``` ##

* See how to [Upgrade Linux nodes](/docs/tasks/administer-cluster/kubeadm/upgrading-linux-nodes/).