Why initcontainer static answer is there for evaluation when there is no mention about it in question

Kubernetes
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#1

for question 5 , there is no metion about use of initcontainer yet the script marks my solution as wrong with the static solution containing init container.SECTION: STORAGE

Solve this question on: ssh cluster1-controlplane

There is a requirement to share a volume between two containers that are running within the same pod. Use the following instructions to create the pod and related objects:

  • Create a pod named grape-pod-cka06-str.

  • The main container should use the nginx image and mount a volume called grape-vol-cka06-str at path /var/log/nginx.

  • The sidecar container can use busybox image, you might need to add a sleep 7200 command to this container to keep it running. Next, mount the same volume called grape-vol-cka06-str at the path /usr/src.

  • The volume should be of type emptyDir. for this question does the sie car container always mean a init contaainer?

#2

This looks like you’re doing the ultimate CKA mock exam, so you should really also please include which exam number, besides the question number.

That said – the Linux Foundation recently adopted the definition of sidecar containers from this page in the docs, which defines a sidecar container as:

  1. Using an initContainer
  2. Setting its RestartPolicy to Always.
    In the exam, just like here, they expect you to know that now. Using a regular container as a sidecar, for that reason, will no longer work n the exam. So we’re doing that as well.
#3

Please read this article that was recently added to the course

#4

so if I am deploying the sidecar without sidecar , will it be marked as wrong I can score with a side car too?

#5

What used to be called a sidecar before kubernetes 1.29 (that is, additional containers under containers: section), is now called co-located container

A sidecar container now means a container in the initContainers: section with restartPolicy: Always

Linux Foundation says:

This means that whenever we want candidates to create a sidecar container, it is aligned with the official doc’s definition of sidecar, and if we want candidates to create a co-located container (the old way), we ask for a co-located container.

This is how the real exam will mark it and therefore how we now mark it. So if you mix up these definitions, then you will not score.

#6

Thanks Alistair, just a follow up , the quoted part is available publically on any URL ?

#7

I believe he filed a issue in his LF account form and they replied to him, so there’s no public URL.

#8

That is exactly what I did @chandankode
I often file tickets with LF for clarification on exam requirements.