Challenges

Focused, hands-on DevOps and server-side problems with hints, feedback, and automated solution checks.

Challenge

Debug a Go Container Image That Fails to Start After a Recent Change

A Go service that has always been shipped as a static binary in a scratch-y image suddenly fails to start in a container, while the local build works as before. Find what recent changes caused it and fix the image without reverting them.

Challenge

Inject an Ephemeral Container into a Distroless Pod and Test Cross-Namespace HTTP

A distroless pod running in the cherry namespace has no shell or debugging tools. Use kubectl debug to attach an ephemeral container, test connectivity to the request-logger service, and verify the request was received in its logs.