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.
Create a Pod that uses a generic ephemeral volume backed by a dynamic StorageClass. Unlike emptyDir, ephemeral volumes are provisioned as PersistentVolumeClaims and support storage requests and access modes.
Combine an existing ConfigMap and Secret into one volume and mount them at a single path inside a Pod — using only one volume definition.
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.
Harden a container by implementing a read-only root filesystem with specific writable volumes for nginx. This is a critical security practice to prevent runtime modifications.