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.
Challenges crafted by iximiuz Labs to help you master DevOps and Server Side topics.
Sometimes an image needs to be removed from a registry - because it was pushed by mistake, contains sensitive data, or simply should no longer be available. Practice purging a container image properly: remove the tag, trace it to the manifest and blobs behind it, and make sure the image can no longer be pulled - even by digest.
Practice discovering what has been published to a remote container repository by listing its tags using crane, regctl, or a direct call to the registry HTTP API.
Set up your own OCI-compatible container registry with username/password authentication and HTTPS - the kind of protection you'd expect before using a registry in production.
Stand up a self-hosted container registry so you can push and pull images without relying on a third-party registry. Useful for tests, internal services, air-gapped environments, or just for poking at the OCI Distribution API.
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?
Practice using docker login to authenticate against multiple private container registries with different credentials, then pull and push images across them.
Use Kubernetes image volumes to mount a static HTML artifact into an nginx Pod without an init container or a custom nginx image.
Get container images onto a server that has no route to the Internet or access to a container registry.
Re-tag local container images with fully-qualified references and publish them to different registries using the 'docker tag' and 'docker push' commands.
Explore the OCI image index, manifests, and configuration of a remote multi-platform image - without pulling a single byte of filesystem layers into the local Docker daemon.
