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Linux Foundation CKA Exam - Topic 3 Question 73 Discussion

Score: 7%TaskGiven 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.
A) Explanation: 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

Linux Foundation CKA Exam - 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.

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Suggested Answer: A

by Fatima at Sep 13, 2024, 07:39 PM

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Stefania
6 months ago
Is it really safe to skip the etcd upgrade?
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Eleonora
6 months ago
This is straightforward, nice step-by-step!
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Loise
7 months ago
Wait, why are we upgrading just the master node?
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Kaitlyn
7 months ago
Totally agree, but don't forget to back up first!
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Ruthann
7 months ago
Just a minor version upgrade, easy peasy!
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Carlee
7 months ago
I recall that we should use `kubectl cordon` before draining, but I’m not clear if we need to include the `--force` flag when draining.
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Olive
7 months ago
I’m a bit confused about the order of commands. Do we really need to restart kubelet after the upgrade, or can we just uncordon it right away?
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Lore
8 months ago
This question feels similar to the practice one where we had to upgrade the control plane. I think we also had to specify the version for kubelet and kubectl, right?
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Claudio
8 months ago
I think I remember that we need to drain the master node first, but I'm not entirely sure about the exact command syntax for draining.
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Mireya
8 months ago
I want to make sure I understand this correctly before I start. Do I need to do anything special with the etcd data during the upgrade? And should I be concerned about any downtime or service disruptions while I'm upgrading the master node?
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Ruthann
8 months ago
This is a common task for Kubernetes upgrades. The key is to focus on the master node first, as that's where the control plane components are running. Draining the node, upgrading kubeadm, kubelet, and kubectl, and then uncordoning the node should do the trick.
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Felicidad
8 months ago
Hmm, I'm a bit confused about the steps here. Do I need to upgrade the worker nodes as well, or just the master? And what's the difference between kubeadm upgrade and the package upgrades?
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Carol
8 months 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
8 months ago
This seems straightforward. I think the \copy command with the DELIMITER option is the way to go.
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Alaine
1 year 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
1 year 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
1 year 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
12 months ago
User 3: Well, hopefully it works out for them in the end.
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Daniel
1 year ago
User 2: Daniel, I think they are following a specific solution guide for the upgrade process.
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Adelle
1 year ago
User 1: I know, right? 'apt-get install' on a Kubernetes cluster sounds risky.
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Julianna
1 year 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
1 year ago
You're right, but it's always good to consider graceful termination of pods if possible.
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Dallas
1 year ago
I think using the --force flag ensures that all pods are evicted from the node quickly.
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Casandra
1 year 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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Marshall
1 year ago
Yeah, the solution provided looks clear. Let's give it a try.
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Colene
1 year ago
I think I can handle it. Just need to follow the steps carefully.
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Marshall
1 year ago
This question seems challenging.
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