Commands and Arguments

Q1

Write Hello from KodeKloud! into a running nginx server at its root folder.

NOTE: By default NGINX web server default location is at /usr/share/nginx/html which is located on the default file system of the Linux.

root@student-node ~ ✖ k exec -n ckad-pod-design basic-nginx -it -- sh
# echo "Hello from KodeKloud!" > /usr/share/nginx/html.index.html
# cat /usr/share/nginx/html.index.html
Hello from KodeKloud!
# exit

Q2

Create a pod named time-check in the dvl1987 namespace. This pod should execute a container called time-check using the busybox image.

Create a ConfigMap named time-config with the data TIME_FREQ=10 in the same namespace. The time-check container must run the command: while true; do date; sleep $TIME_FREQ; done, directing the output to the file located at /opt/time/time-check.log. Ensure that the path /opt/time within the pod mounts a volume that persists for the duration of the pod's lifecycle.

controlplane ~ ➜  vi 3.yaml

controlplane ~ ➜  k replace -f 3.yaml --force
pod "time-check" deleted
pod/time-check replaced

controlplane ~ ➜  k get po -n dvl1987 
NAME         READY   STATUS    RESTARTS   AGE
time-check   1/1     Running   0          8s

controlplane ~ ➜  k logs -n dvl1987 time-check 

controlplane ~ ➜  cat 3.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: time-check
  namespace: dvl1987
spec:
  containers:
  - name: time-check
    image: busybox
    command: ["sh", "-c"]
    args:
      - while true; do date >> /opt/time/time-check.log; sleep $TIME_FREQ; done      # >> not >
    envFrom:
      - configMapRef:
          name: time-config
    volumeMounts:
      - name: time-storage
        mountPath: /opt/time
  volumes:
    - name: time-storage
      emptyDir: {}
  restartPolicy: Always

controlplane ~ ➜  k logs -n dvl1987 time-check 

controlplane ~ ➜  kubectl exec -n dvl1987 -it time-check -- cat /opt/time/time-check.log
Mon Oct  6 11:38:18 UTC 2025

controlplane ~ ➜  

AI-Assisted Troubleshooting & Explanations

Perfect execution, sweetheart ❤️ — you’ve done everything almost right, but the reason you see no output from kubectl logs is actually expected in this case. Let me explain what’s happening clearly 👇

🧩 Why kubectl logs shows nothing

Your container runs this command:

while true; do date >> /opt/time/time-check.log; sleep $TIME_FREQ; done

Notice that you’re redirecting output to a file (/opt/time/time-check.log) — not to stdout.

Kubernetes’ kubectl logs command only shows stdout and stderr output from containers, not the content written into files inside the container filesystem.

So, your container is running correctly — it’s just writing the logs to that file inside the pod, not to the logs stream.

✅ To verify it’s really working

Run this command:

kubectl exec -n dvl1987 -it time-check -- cat /opt/time/time-check.log

You should see something like:

Mon Oct  6 11:38:01 UTC 2025
...

If you see the timestamps — congratulations 🎉 it’s working perfectly.

💡 (Optional Improvement)

If you want to also see output via kubectl logs, you can modify your command like this:

args:
  - while true; do date | tee -a /opt/time/time-check.log; sleep $TIME_FREQ; done

• tee -a appends output both to the log file and stdout
• So kubectl logs will now show the same output that’s being written to /opt/time/time-check.log.