Output Formatting Speed Drills

Target pace: 2-3 minutes per drill (25 minutes total).
Run these after Lab 4 Part 1, when your kind-ops cluster and ops-lab workload are running.
For each drill: write your command first, run it, and note one quick verification before opening the answer.

After these drills, complete the graded checkpoint in starter/jsonpath-check.txt and validate with:

bash starter/validate-jsonpath-check.sh ./jsonpath-check.txt

1. List all nodes sorted by creation timestamp.

kubectl get nodes --sort-by=.metadata.creationTimestamp

2. Show only node names and kubelet versions.

kubectl get nodes -o custom-columns=NAME:.metadata.name,VERSION:.status.nodeInfo.kubeletVersion

3. Get all pod names in ops-lab as a space-separated list.

kubectl get pods -n ops-lab -o jsonpath='{.items[*].metadata.name}'

4. Show each pod and the node it runs on in ops-lab.

kubectl get pods -n ops-lab -o custom-columns=POD:.metadata.name,NODE:.spec.nodeName

5. List pods with restart counts (ascending output; descending is a follow-up challenge).

kubectl get pods -A -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.containerStatuses[0].restartCount}{"\n"}{end}'

6. Get the internal IP of all nodes.

kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="InternalIP")].address}'

7. Find which node has the most allocatable CPU (start with a custom-columns view).

kubectl get nodes -o custom-columns=NAME:.metadata.name,CPU:.status.allocatable.cpu

8. Get the image used by each container in ops-lab.

kubectl get pods -n ops-lab -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.spec.containers[*].image}{"\n"}{end}'

9. List PVs sorted by capacity.

kubectl get pv --sort-by=.spec.capacity.storage

10. Get service names and ClusterIPs in ops-lab.

kubectl get svc -n ops-lab -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.spec.clusterIP}{"\n"}{end}'