Drive it with kubectl

Your boss says the shop is acting weird. You have one tool: kubectl. What do you do first?

~/shop $ kubectl apply -f tray.yamlpod/tray created~/shop $ kubectl get podsNAME   READY   STATUS    RESTARTS   AGEtray   0/1     Pending   0          0s

kubectlkubectl: Your walkie-talkie to the office: the command-line tool that talks to the API server. is your walkie-talkie to the office. kubectl apply -f tray.yaml puts up the order in that file. kubectl get pods lists your trays. Pending means still getting ready.

A tray looks odd? Ask for its whole story. Type kubectl describe pod tray. Read the Events at the end.

The kitchen app printed a message. Which command shows it?

~/shop $ kubectl logs kitchenKedai Kancil is open~/shop $ kubectl exec kitchen -- hostnamekitchen

kubectl logs kitchen shows what the app printed. kubectl exec kitchen -- hostname runs one command inside the tray.

Build a command that asks the kitchen pod its name, from inside.

Now tidy up. Read the pink bar first: kind-dev, default. Then delete the tray with kubectl delete pod tray.

Which commands only look, and which change the cluster?

You can now look, change and clean up with kubectl.