# Upgrading Linux nodes LLMS index: [llms.txt](/llms.txt) --- This page explains how to upgrade a Linux Worker Nodes created with kubeadm. ## Before you begin

You need to have shell access to all the nodes, and the kubectl command-line tool must be configured to communicate with your cluster. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts.

To check the version, enter kubectl version.

* 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 Linux Worker nodes. ## Changing the package repository If you're using the community-owned package repositories (`pkgs.k8s.io`), you need to enable the package repository for the desired Kubernetes minor release. This is explained in [Changing the Kubernetes package repository](/docs/tasks/administer-cluster/kubeadm/change-package-repository/) document.

Note: The legacy package repositories (apt.kubernetes.io and yum.kubernetes.io) have been deprecated and frozen starting from September 13, 2023. Using the new package repositories hosted at pkgs.k8s.io is strongly recommended and required in order to install Kubernetes versions released after September 13, 2023. The deprecated legacy repositories, and their contents, might be removed at any time in the future and without a further notice period. The new package repositories provide downloads for Kubernetes versions starting with v1.24.0.

## Upgrading worker nodes ### Upgrade kubeadm Upgrade kubeadm:

Ubuntu, Debian or HypriotOS
CentOS, RHEL or Fedora

# replace x in 1.36.x-* with the latest patch version
sudo apt-mark unhold kubeadm && \
sudo apt-get update && sudo apt-get install -y kubeadm='1.36.x-*' && \
sudo apt-mark hold kubeadm

For systems with DNF:

# replace x in 1.36.x-* with the latest patch version
sudo yum install -y kubeadm-'1.36.x-*' --disableexcludes=kubernetes

For systems with DNF5:

# replace x in 1.36.x-* with the latest patch version
sudo yum install -y kubeadm-'1.36.x-*' --setopt=disable_excludes=kubernetes

### Call "kubeadm upgrade" For worker nodes this upgrades the local kubelet configuration: ```shell sudo kubeadm upgrade node ``` ### Drain the node Prepare the node for maintenance by marking it unschedulable and evicting the workloads: ```shell # execute this command on a control plane node # replace with the name of your node you are draining kubectl drain --ignore-daemonsets ``` ### Upgrade kubelet and kubectl 1. Upgrade the kubelet and kubectl:

Ubuntu, Debian or HypriotOS
CentOS, RHEL or Fedora

# replace x in 1.36.x-* with the latest patch version
sudo apt-mark unhold kubelet kubectl && \
sudo apt-get update && sudo apt-get install -y kubelet='1.36.x-*' kubectl='1.36.x-*' && \
sudo apt-mark hold kubelet kubectl

For systems with DNF:

# replace x in 1.36.x-* with the latest patch version
sudo yum install -y kubelet-'1.36.x-*' kubectl-'1.36.x-*' --disableexcludes=kubernetes

For systems with DNF5:

# replace x in 1.36.x-* with the latest patch version
sudo yum install -y kubelet-'1.36.x-*' kubectl-'1.36.x-*' --setopt=disable_excludes=kubernetes

1. Restart the kubelet: ```shell sudo systemctl daemon-reload sudo systemctl restart kubelet ``` ### Uncordon the node Bring the node back online by marking it schedulable: ```shell # execute this command on a control plane node # replace with the name of your node kubectl uncordon ``` ## What's next * See how to [Upgrade Windows nodes](/docs/tasks/administer-cluster/kubeadm/upgrading-windows-nodes/).