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.
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.
An internal service is halfway through a Python-to-Go rewrite: the amd64 build already runs the new Go code while arm64 still ships the legacy Python one - same API, two completely different codebases and Dockerfiles. Can you build and push a single multi-platform image from the two independent single-platform variants?
Combine your knowledge of QEMU emulation, cross-compilation, and remote builders to build and push a multi-platform container image (linux/amd64 + linux/arm64) to a registry.
Learn how to build a secure, lightweight, and production-ready Python container image for a FastAPI application by following this hands-on challenge full of practical tips and tricks. Solutions for pip + venv, poetry, and uv are included.
Learn how to build a secure, lightweight, and production-ready container image for a dynamically linked Go application by following this hands-on challenge full of practical tips and tricks.
Not all distroless images are created equal. Can you find the right base image for the application in this challenge?
Learn a bunch of Linux networking tricks while trying to access an Nginx server running inside a container started with ctr and a bare containerd daemon.
