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CKADApplication Observability and MaintenanceSingle nodeEasy

Logs, label selectors and custom output to files

Scenario ckad-obs-003 · about 7 minutes · 6 points · 6 grader checks

Collect container logs and produce label-filtered and custom-column kubectl output into answer files.

  • logs
  • jsonpath
  • custom-columns
  • labels
  • kubectl-output

What you will practise

  • Read container logs with kubectl logs -c
  • Filter objects with label selectors
  • Format kubectl output with -o custom-columns, -o jsonpath and --sort-by

Start this lab

With the CLI installed and signed in, this command provisions a single node cluster on your Mac, applies the scenario setup and prints the task below.

goldenkube start ckad-obs-003

Task

The task text exactly as the CLI shows it. Solve it on the cluster, then run goldenkube submit.

Namespace "observe" runs the Pods "emitter", "api-1", "api-2" and "web-1". Work on the control plane node exam-cp1 and write these files into the existing directory /opt/answers: 1. /opt/answers/emitter.log — the complete logs of the container "main" of Pod "emitter". 2. /opt/answers/backend-pods.txt — the names of all Pods in "observe" that carry the label tier=backend, one name per line, nothing else. 3. /opt/answers/images.txt — a table of every Pod in "observe" with exactly two columns, a header line "NAME IMAGE" and one line per Pod (the Pod name and the image of its first container), sorted by Pod name. 4. /opt/answers/node.txt — the name of the node Pod "emitter" runs on.

Requirements and details

Certification
CKAD · Certified Kubernetes Application Developer
Domain
Application Observability and Maintenance
Difficulty
Easy
Cluster topology
Single node
Cluster features
None beyond the base cluster
Recommended time
7 minutes
Points
6
Grader checks
6
Kubernetes version
1.37
Minimum CLI version
0.1.0
Scenario version
1
Published

Grading runs locally: 6 state checks read your cluster when you submit; the scenario passes when every check passes. Hints, the reference solution and the check definitions are available only inside the CLI, not on this page.

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Independent community project, not affiliated with or endorsed by CNCF or The Linux Foundation. Lab results are practice feedback, not an exam score.