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Upgrading Windows nodes

FEATURE STATE: Kubernetes v1.18 [beta]

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

Before you begin

You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. If you do not already have a cluster, you can create one by using Minikube, or you can use one of these Kubernetes playgrounds:

Your Kubernetes server must be at or later than version 1.17. To check the version, enter kubectl version.

Upgrading worker nodes

Upgrade kubeadm

  1. From the Windows node, upgrade kubeadm:

    # replace v1.18.8 with your desired version
    curl.exe -Lo C:\k\kubeadm.exe https://dl.k8s.io/v1.18.8/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:

    # 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:

    kubeadm upgrade node
    

Upgrade kubelet

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

    stop-service kubelet
    curl.exe -Lo C:\k\kubelet.exe https://dl.k8s.io/v1.18.8/bin/windows/amd64/kubelet.exe
    restart-service kubelet
    

Uncordon the node

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

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

Upgrade kube-proxy

  1. From a machine with access to the Kubernetes API, run the following, again replacing v1.18.8 with your desired version:

    curl -L https://github.com/kubernetes-sigs/sig-windows-tools/releases/latest/download/kube-proxy.yml | sed 's/VERSION/v1.18.8/g' | kubectl apply -f -