Starting: 1st of Every Month 
+91 8409492687 
Contact@DevOpsSchool.com
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ssh aen@c1-cp1 | |
| cd ~/content/course/02/demo | |
| #1 - Find the version you want to upgrade to. | |
| #You can only upgrade one minor version to the next minor version | |
| sudo apt update | |
| apt-cache policy kubeadm | |
| #What version are we on? | |
| kubectl version --short | |
| kubectl get nodes | |
| #First, upgrade kubeadm on the Control Plane Node | |
| #Replace the version with the version you want to upgrade to. | |
| sudo apt-mark unhold kubeadm | |
| sudo apt-get update | |
| sudo apt-get install -y kubeadm=1.22.5-00 | |
| sudo apt-mark hold kubeadm | |
| #All good? | |
| kubeadm version | |
| #Next, Drain any workload on the Control Plane Node node | |
| kubectl drain c1-cp1 --ignore-daemonsets | |
| #Run upgrade plan to test the upgrade process and run pre-flight checks | |
| #Highlights additional work needed after the upgrade, such as manually updating the kubelets | |
| #And displays version information for the control plan components | |
| sudo kubeadm upgrade plan v1.22.5 | |
| #Run the upgrade, you can get this from the previous output. | |
| #Runs preflight checks - API available, Node status Ready and control plane healthy | |
| #Checks to ensure you're upgrading along the correct upgrade path | |
| #Prepulls container images to reduce downtime of control plane components | |
| #For each control plane component, | |
| # Updates the certificates used for authentication | |
| # Creates a new static pod manifest in /etc/kubernetes/mainifests and saves the old one to /etc/kubernetes/tmp | |
| # Which causes the kubelet to restart the pods | |
| #Updates the Control Plane Node's kubelet configuration and also updates CoreDNS and kube-proxy | |
| sudo kubeadm upgrade apply v1.22.5 #<---this format is different than the package's version format | |
| #Look for [upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.xx.yy". Enjoy! | |
| #Uncordon the node | |
| kubectl uncordon c1-cp1 | |
| #Now update the kubelet and kubectl on the control plane node(s) | |
| sudo apt-mark unhold kubelet kubectl | |
| sudo apt-get update | |
| sudo apt-get install -y kubelet=1.22.5-00 kubectl=1.22.5-00 | |
| sudo apt-mark hold kubelet kubectl | |
| #Check the update status | |
| kubectl version --short | |
| kubectl get nodes | |
| #Upgrade any additional control plane nodes with the same process. | |
| #Upgrade the workers, drain the node, then log into it. | |
| #Update the enviroment variable so you can reuse those code over and over. | |
| kubectl drain c1-node[XX] --ignore-daemonsets | |
| ssh aen@c1-node[XX] | |
| #First, upgrade kubeadm | |
| sudo apt-mark unhold kubeadm | |
| sudo apt-get update | |
| sudo apt-get install -y kubeadm=1.22.5-00 | |
| sudo apt-mark hold kubeadm | |
| #Updates kubelet configuration for the node | |
| sudo kubeadm upgrade node | |
| #Update the kubelet and kubectl on the node | |
| sudo apt-mark unhold kubelet kubectl | |
| sudo apt-get update | |
| sudo apt-get install -y kubelet=1.22.5-00 kubectl=1.22.5-00 | |
| sudo apt-mark hold kubelet kubectl | |
| #Log out of the node | |
| exit | |
| #Get the nodes to show the version...can take a second to update | |
| kubectl get nodes | |
| #Uncordon the node to allow workload again | |
| kubectl uncordon c1-node[XX] | |
| #check the versions of the nodes | |
| kubectl get nodes | |
| ####TO DO### | |
| ####BE SURE TO UPGRADE THE REMAINING WORKER NODES##### | |
| #check the versions of the nodes | |
| kubectl get nodes |
by 
I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at I reviewed , and SEO strategies at Wizbrand.
Please find my social handles as below;
Rajesh Kumar Personal Website
Rajesh Kumar at YOUTUBE
Rajesh Kumar at INSTAGRAM
Rajesh Kumar at X
Rajesh Kumar at FACEBOOK
Rajesh Kumar at LINKEDIN
Rajesh Kumar at PINTEREST
Rajesh Kumar at QUORA
Rajesh Kumar at WIZBRAND
