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Hands-on Kubernetes labs

Exam-style tasks for the performance-based certifications, run on a real kubeadm cluster on your own Mac with the GoldenKube CLI and graded locally. Each card shows the task's domain, the cluster topology it needs, the recommended time and its points; the detail page has the full task text.

DomainAllCluster Architecture, Installation & ConfigurationServices & NetworkingStorageTroubleshootingWorkloads & Scheduling
DifficultyAllEasyMediumHard
TopologyAllSingle nodeTwo nodesThree nodes

2 of 37 scenarios match · Clear filters

CKATroubleshootingEasy

Cluster DNS down

Service name resolution has stopped working; investigate and restore the cluster DNS component.

Two nodes · ~5 min · 5 points

  • troubleshooting
  • coredns
  • dns
  • kube-system

goldenkube start cka-trb-005

CKATroubleshootingEasy

ImagePullBackOff: wrong image tag

A Deployment's pods cannot pull their image; correct the image and get the replicas Ready.

Single node · ~5 min · 5 points

  • troubleshooting
  • imagepullbackoff
  • deployment
  • image

goldenkube start cka-trb-009

Exams covered

  • CKA · Certified Kubernetes Administrator · scenarios verified on Kubernetes 1.37 · 37 published scenarios · mock exam: 15 tasks in 120 minutes, pass at 66%

How to run a lab

  1. Install the CLI and Multipass, then run goldenkube doctor.
  2. Sign in with goldenkube login (free account).
  3. Start a scenario with its id, solve the task on the cluster, run goldenkube submit.

Grading happens on your machine and is practice feedback, not an official score. Tasks are public; hints, reference solutions and grader internals are not.