Linux Foundation Exam CKA Topic 3 Question 73 Discussion

Actual exam question for Linux Foundation's CKA exam

Question #: 73
Topic #: 3

[All CKA Questions]

Score: 7%

Task

Given an existing Kubernetes cluster running version 1.20.0, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.20.1.

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.

AExplanation:
SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon k8s-master
kubectl drain k8s-master --delete-local-data --ignore-daemonsets --force
apt-get install kubeadm=1.20.1-00 kubelet=1.20.1-00 kubectl=1.20.1-00 --disableexcludes=kubernetes
kubeadm upgrade apply 1.20.1 --etcd-upgrade=false
systemctl daemon-reload
systemctl restart kubelet
kubectl uncordon k8s-master

Show Suggested Answer

Suggested Answer: A

by Fatima at Sep 13, 2024, 08:39 PM

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Carol

2 days ago

Looks straightforward, I'll start by cordoning the master node, then drain it to ensure no pods are running. Next, I'll upgrade the control plane components using kubeadm, and finally, upgrade the kubelet and kubectl packages.

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Ty

16 days ago

This seems straightforward. I think the \copy command with the DELIMITER option is the way to go.

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Alaine

5 months ago

Upgrading the kubelet and kubectl on the master node is an important step that I'm glad they included. Can't have a mismatch between the control plane and the client tools!

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Sylvie

5 months ago

The instructions cover all the bases, from upgrading the control plane to the node components. I'm confident this will get the job done without any issues.

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Nan

5 months ago

Haha, 'apt-get install' on a Kubernetes cluster? That's a bold move, Cotton! Let's see if it pays off.

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Blondell

4 months ago

User 3: Well, hopefully it works out for them in the end.

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Daniel

4 months ago

User 2: Daniel, I think they are following a specific solution guide for the upgrade process.

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Adelle

4 months ago

User 1: I know, right? 'apt-get install' on a Kubernetes cluster sounds risky.

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Julianna

6 months ago

Looks good, but I'm a bit concerned about the `--force` flag in the `drain` command. Is that really necessary? Wouldn't it be better to gracefully stop the pods on the master node?

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Nancey

5 months ago

You're right, but it's always good to consider graceful termination of pods if possible.

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Dallas

5 months ago

I think using the --force flag ensures that all pods are evicted from the node quickly.

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Casandra

6 months ago

Draining the master node before upgrading is a crucial step to ensure the cluster's availability during the update process. The instructions are clear and comprehensive.

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