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Exam CKA topic 1 question 3 discussion

Actual exam question from CNCF's CKA

Question #: 3
Topic #: 1

SIMULATION -

Task -
Given an existing Kubernetes cluster running version 1.22.1, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.22.2.
Be sure to drain the master node before upgrading it and uncordon it after the upgrade.

You are also expected to upgrade kubelet and kubectl on the master node.

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Suggested Answer:

by gtsvetko at March 13, 2023, 9:55 a.m.

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AWS_cert2023

Highly Voted 1 year, 6 months ago

--etcd-upgrade Perform the upgrade of etcd. (default true) The default etcd upgrade is true, so disable it with sudo kubeadm upgrade apply v1.** --etcd-upgrade=false

upvoted 7 times

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TONNI2001

Highly Voted 2 years, 3 months ago

not exactly like in the exam. but it helps. do not relay on dumps only. i recommend to study with kodekloud and the corresponding udemy course.

upvoted 5 times

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bella

Most Recent 5 months, 3 weeks ago

kubectl config view kubectl config use-context mk8s kubectl get nodes kubectl cordon mk8s-master-0 kubectl drain mk8s-master-0 –ignore-daemonsets --force ssh mk8s-master0 sudo -i apt install kubeadm=1.22.2-00 kubelet=1.22.2.-00 kubectl=1.22.2-00 kubeadm upgrade plan kubeadm upgrade apply 1.22.2 --etcd-upgrade=false systemctl restart kubelet daemon-reload exit exit kubectl uncordon mk8s-master-0 kubectl get nodes

upvoted 3 times

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noahsark

8 months, 1 week ago

# practice lightninglab1 in Mumshad udemy / kodekloud.

upvoted 2 times

jjfab

7 months, 1 week ago

Is the lightning lab 1 same with the actual CKA exam? Or is it more likely like this example?

upvoted 1 times

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Ayxanus0610

1 year, 4 months ago

$ kubectl config use-config eks8 $ kubectl cordon ek8s-node-1 $ kubectl drain ek8s-node-1 --delete-local-data --ignore-daemonsets --force This is much more understandable solution for me

upvoted 1 times

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real111

1 year, 12 months ago

Would those steps be right? 1. k cordon nodename; 2. k drain --ignore-daemonsets nodename; 3. ssh into node; 4. swapoff -a; 5. then find swap line in /etc/fstab and comment it out; 6. run apt-mark unhold kubeadm kubelet kubectl && \ apt-get update && apt-get install -y kubeadm=1.2xx-00 kubelet=1.2x.x-00 kubectl=1.2x.x-00&& \ apt-mark hold kubeadm kubelet kubectl 7. sudo systemctl daemon-reload 8. sudo systemctl restart kubelet 9. exit ssh 10.k uncordon node

upvoted 4 times

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mrallrounder123453656

2 years, 1 month ago

we need to set --etcd-upgrade=false, question says so not upgrade the etcd

upvoted 4 times

Issaitani

2 years ago

Looking at the upgade logs i can see that etcd is still the same version, but i think you have a point because the --etcd-upgrade flag is set to true by default

upvoted 2 times

Alencar_07

1 year, 7 months ago

I didn't understand the issue that way. It says to update all components and etcd is one of them. "Update all Kubernetes node and control plane components on the master node to version 1.22.2 only."

upvoted 2 times

zain1258

1 year ago

I was also confused about it. But if you see the last picture in question, it clearly says not to upgrade etcd and Addons as well. So I think following is the command to upgrade the cluster kubeadm upgrade apply v1.22.2 --etcd-upgrade=false Now the question is how we can skip CoreDNS upgrade as I don't see any option to skip it

upvoted 1 times

Frank_sinaatra

8 months, 1 week ago

kubeadm upgrade apply v1.**** --skip-phases=addon/coredns --etcd-upgrade=false the --skip-phases can be used for any addon, assuming you call it properly.

upvoted 1 times

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gtsvetko

2 years, 3 months ago

I has this question on the exam, you can follow the steps below to complete it, just ensure that you are ssh-ing from the right node: https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/#upgrading-control-plane-nodes

upvoted 5 times

phidelics

2 years, 3 months ago

are this questions exactly thesame in exams?

upvoted 7 times

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