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Challenges

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Focused, hands-on problems to sharpen your skills.

Challenge,  Medium

Exclude a Sidecar from VPA Using Per-Container Resource Policy

Configure a Vertical Pod Autoscaler (VPA) with a per-container resource policy that provides recommendations for the main container while excluding the sidecar container from any VPA-managed scaling.

Submissions: 16/19
Challenge,  Medium

Inject a Config File Without Overwriting the Image's Existing Directory

A webapp deployment in the prod namespace is stuck in CrashLoopBackOff. The application's startup probe checks that its existing config directory is intact before the container is marked healthy. Fix the deployment so configuration is injected correctly and the pod reaches Running state with its health check endpoint responding on port 8080.

Submissions: 12/18
Challenge,  Medium

Reclaim a Retained PV with a New PVC and Restore a Lost MariaDB Database

A MariaDB deployment and its PVC were accidentally deleted. The PersistentVolume survived due to its Retain policy. Restore the database by rebinding the existing PV without losing any data.

Submissions: 13/16
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