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CKATroubleshootingSingle nodeMedium

CrashLoopBackOff: container command exits

Scenario cka-trb-008 · about 6 minutes · 6 points · 4 grader checks

A Deployment's containers keep exiting; find out why and make them stay running.

  • troubleshooting
  • crashloopbackoff
  • deployment
  • logs

What you will practise

  • Read previous container logs
  • Inspect a container command in a Deployment
  • Edit a Deployment so its pods stay running

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 cka-trb-008

Task

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

In namespace "trb", Deployment "broken-app" (2 replicas) is in CrashLoopBackOff. Find out why the container keeps exiting and fix the Deployment so that both replicas stay Running and Ready. Keep the image "busybox:1.36", keep 2 replicas, and do not delete the Deployment.

Requirements and details

Certification
CKA · Certified Kubernetes Administrator
Domain
Troubleshooting
Difficulty
Medium
Cluster topology
Single node
Cluster features
None beyond the base cluster
Recommended time
6 minutes
Points
6
Grader checks
4
Kubernetes version
1.37
Minimum CLI version
0.1.0
Scenario version
1
Published

Grading runs locally: 4 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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