CKS Notes - work node update
Published
•1 min readC
Some blogs are from my previous blogs, even though I have renovated and checked before migration, but there may be still some parts out of date. (https://blog.sina.com.cn/u/1784323047 or https://blog.csdn.net/li_6698230?type=blog, if they're still accessible.)
Here just a quick present of basic workflow of how to upgrade on the work node.More details can refer to the official doc, upgrading Linux work node.
Notice: The official doc shows is the completed procedural which we will stop the jobs, and drain the node(s) then continue the upgrade, but here we do the upgrade one work node without disturbing the jobs.
1. check the nodes we will upgrade
controlplane:~$ k get no
NAME STATUS ROLES AGE VERSION
controlplane Ready control-plane 10d v1.34.2
node01 Ready <none> 10d v1.34.1
2. ssh to the node and check the version
controlplane:~$ ssh node01
node01:~$ apt-cache madison kubeadm
kubeadm | 1.34.2-1.1 | https://pkgs.k8s.io/core:/stable:/v1.34/deb Packages
kubeadm | 1.34.1-1.1 | https://pkgs.k8s.io/core:/stable:/v1.34/deb Packages
kubeadm | 1.34.0-1.1 | https://pkgs.k8s.io/core:/stable:/v1.34/deb Packages
3. ssh to work node, do the upgrade
node01:~$ apt install kubeadm=1.34.2-1.1
node01:~$ kubeadm upgrade node
node01:~$ apt install kubelet=1.34.2-1.1 kubectl=1.34.2-1.1
node01:~$ systemctl restart kubelet
4. back to controlplane and check the result
node01:~$ ssh controlplane
controlplane:~$ k get node
NAME STATUS ROLES AGE VERSION
controlplane Ready control-plane 10d v1.34.2
node01 Ready <none> 10d v1.34.2
Cluster upgrade
If need to upgrade the controlplane node, see the article here, or the official doc about upgrade kubeadm.