Linux Foundation Exam CKA Topic 2 Question 66 Discussion

Actual exam question for Linux Foundation's CKA exam

Question #: 66
Topic #: 2

Score:7%

Context

An existing Pod needs to be integrated into the Kubernetes built-in logging architecture (e. g. kubectl logs). Adding a streaming sidecar container is a good and common way to accomplish this requirement.

Task

Add a sidecar container named sidecar, using the busybox Image, to the existing Pod big-corp-app. The new sidecar container has to run the following command:

/bin/sh -c tail -n+1 -f /va r/log/big-corp-app.log

Use a Volume, mounted at /var/log, to make the log file big-corp-app.log available to the sidecar container.

AExplanation:
Solution:
#
kubectl get pod big-corp-app -o yaml
#
apiVersion: v1
kind: Pod
metadata:
name: big-corp-app
spec:
containers:
- name: big-corp-app
image: busybox
args:
- /bin/sh
- -c
- >
i=0;
while true;
do
echo '$(date) INFO $i' >> /var/log/big-corp-app.log;
i=$((i+1));
sleep 1;
done
volumeMounts:
- name: logs
mountPath: /var/log
- name: count-log-1
image: busybox
args: [/bin/sh, -c, 'tail -n+1 -f /var/log/big-corp-app.log']
volumeMounts:
- name: logs
mountPath: /var/log
volumes:
- name: logs
emptyDir: {
}
#
kubectl logs big-corp-app -c count-log-1

Show Suggested Answer

Suggested Answer: A

by Ardella at Jul 17, 2024, 05:21 AM

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Deeann

6 months ago

The step-by-step solution provided is very clear and easy to follow. I'm confident I could implement this in a real-world scenario.

upvoted 0 times

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Kris

6 months ago

Haha, the pod name 'big-corp-app' makes me chuckle. I wonder if they have a 'small-startup-app' somewhere as well.

upvoted 0 times

...

6 months ago

The sidecar container using the busybox image is a great way to integrate the existing pod with the Kubernetes logging architecture. The command to tail the log file and make it available to kubectl logs is spot on.

upvoted 0 times