Exam CKA topic 1 question 21 discussion

Actual exam question from CNCF's CKA

Question #: 21
Topic #: 1

[All CKA Questions]

SIMULATION
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Task
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Schedule a pod as follows:

• Name: nginx-kusc00401
• Image: nginx
• Node selector: disk=spinning

Show Suggested Answer

Suggested Answer: apiVersion: v1 kind: Pod metadata: name: nginx-kusc00401 spec: containers: - name: nginx-kusc00401 image: nginx nodeSelector: disk=spinning

by abu7midan at Nov. 17, 2023, 1:31 p.m.

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Jasonwcc

5 days, 14 hours ago

1. Switch to respective context kubectl config use-context k8s 2. Create the yaml kubectl run nginx-kusc00401 --image nginx --dry-run=client -oaml > q21.yaml 3. Edit the yaml vi q21.yaml 4. Just add following line below dnsPolicy. Make sure align with it ... dnsPolicy: ClusterFirst nodeSelector: disk: spinning #make sure to indented below nodeSelector --- 5. kubectl apply -f q21.yaml 6. kubectl get pods -o wide

upvoted 1 times

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2211094

8 months, 2 weeks ago

here is the answer, but you can also add labels on metadata apiVersion: v1 kind: Pod metadata: name: nginx-kusc00401 spec: containers: - name: nginx-kusc00401 image: nginx nodeSelector: disk: spinning

upvoted 4 times

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fc146fc

1 year, 4 months ago

kubectl label nodes <your-node-name> disk=spinning and then create the below nginx.yaml file apiVersion: v1 kind: Pod metadata: name: nginx labels: env: test spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent nodeSelector: disktype: spinning and finally Kubectl create -f nginx.yaml

upvoted 3 times

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abu7midan

1 year, 7 months ago

k label node node01 disk=spanning apiVersion: v1 kind: Pod metadata: name: nginx-kusc00401 labels: env: test spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent nodeSelector: disk: spinning

upvoted 4 times

skywalker

1 year, 7 months ago

Should be ssd as disk.. --- apiVersion: v1 kind: Pod metadata: creationTimestamp: null labels: run: nginx-kusc00401 name: nginx-kusc00401 spec: containers: - image: nginx name: nginx-kusc00401 nodeSelector: disk: ssd

upvoted 1 times

testingspeedz214

9 months, 3 weeks ago

Wrong. nodeSelector shouled be disk=spinning as specified in the question

upvoted 1 times

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Stargazer11

1 year, 5 months ago

No it's Not. Question mentions disk=spinning. So we have to label the node first as disk=spinning.

upvoted 5 times

Nasser_Sam

7 months, 1 week ago

Why do you need to label a node? How do you know which node to label? I think the label already exists, and all you need to do is create a pod with a node selector referring to this label.

upvoted 2 times

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