Exam CKA topic 1 question 14 discussion

kubectl top pod -l name=overloaded-cpu --sort-by=cpu

Why would they add "(which already exists)"? It just confuses matters. In other questions they do not add this qualification. Makes me wonder if that file is empty? Maybe first # cat /opt/KUTR00401/KUTR00401.txt to make sure it's empty. If it's not, # echo "name-of-top-cpu-pod" >> /opt/KUTR00401/KUTR00401.txt Instead of # echo "name-of-top-cpu-pod" > /opt/KUTR00401/KUTR00401.txt Or am I overthinking here?

kubectl top pod -l name=overloaded-cpu --sort-by=cpu | head -n 1 > /opt/KUTR00401/KUTR00401.txt ## Note: The --sort-by=cpu flag will sort the pods by CPU usage, but to capture only the topmost CPU-consuming pod (not all pods), you'll need to use head -n 1 to select the first result. ## | head -n 1: Selects the pod with the highest CPU usage from the sorted list.

killer_sh_lab practice: # In spec - containers - args: --secure-port=4443 --kubelet-insecure-tls # Add # In ports: - containerPort: 4443 # Add hostNetwork above nodeSelector: hostNetwork: true nodeSelector: kubernetes.io/os: linux k apply -f metrics-server.yml k run nginx --image=nginx --labels=”name=overloaded-cpu” --dry-run=client -o=yaml > nginx.yaml k apply -f nginx.yaml mkdir /opt/KUTR00401 touch /opt/KUTR00401/KUTR00401.txt k top pods -l=’name=overloaded-cpu’ --sort-by=cpu echo “nginx” >> /opt/KUTR00401/KUTR00401.txt cat /opt/KUTR00401/KUTR00401.txt

kubectl top pod -l name=overloaded-cpu --sort-by=cpu --no-headers | head -n 1 | awk '{print $1}' > /opt/KUTR00401/KUTR00401.txt

kubectl top pod -l name=overloaded-cpu --sort-by=cpu | awk 'NR==2 {print $1}' > /opt/KUTR00401/KUTR00401.txt

Frankly speaking, why bother typing the pod name with this single liner: # Dry-run k top po -l name=overloaded-cpu --sort-by=cpu -A --no-headers | head -n 1 | awk '{print $2}' # Exec k top po -l name=overloaded-cpu --sort-by=cpu -A --no-headers | head -n 1 | awk '{print $2}' >> /opt/KUTR00401/KURT00401.txt

default or all namespaces ?

I think the answer should be: overloaded-cpu-98b9se