Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
Build five ways to combine containers in one Pod: a sidecar that extends the app, an init container that finishes before the app starts, a native sidecar with a startup guarantee, an ambassador that mutates an outbound call, and an adapter that translates an inbound one.
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.
Add a sidecar container to an existing Deployment that tails a shared log file written by the main application container. Use a shared volume to make the log file available to both containers.
Create a Pod with a main application container and a sidecar container that continuously streams shared logs. Kubernetes implements sidecar containers as a special case of init containers.
Identify what causes the Pod initialization to fail and fix it while keeping the Pod images unchanged.
Identify what causes the Pod initialization to fail and fix it while keeping the Pod images unchanged.
