Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
Learn how to build and publish an uncompressed container image - a helpful trick to optimize disk I/O for large images, especially when you can benefit from a fast internal network.
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.
Learn how to build a secure, lightweight, and production-ready container image for a statically linked Go application by following this hands-on challenge full of practical tips and tricks.
Learn how to build a secure, lightweight, and production-ready Node.js container image for a SvelteKit application by following this hands-on challenge full of practical tips and tricks.
Learn how to build a secure, lightweight, and production-ready Node.js container image for a Next.js application by following this hands-on challenge full of practical tips and tricks.
Learn how to build a secure, lightweight, and production-ready Node.js container image for a Nuxt application by following this hands-on challenge full of practical tips and tricks.
Can you resolve issues with a Node.js container's termination process to ensure graceful shutdown on 'docker stop'?
Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?
Learn how to copy all image tags from one repository to another in an efficient way.
Learn how to copy a multi-platform image from one repository to another using the docker manifest command or other, more convenient, tools like crane, skopeo, or regctl.
Learn how to perform one of the most basic Docker operations - build and publish a container image.
Learn how to leverage Docker to copy a container image from one repository to another.
Learn how to copy a container image from one repository to another without using Docker, Podman, or any other container runtime.
Can you unpack the filesystem of a container image into a local directory?
Not all distroless images are created equal. Can you find the right base image for the application in this challenge?
Learn on practice the limitations of FROM scratch images and the ways to mitigate them.
Learn how to extract files from container images with the ctr command-line client.
Learn how to label container images using the ctr command.
Learn how to pull container images from different registries using the ctr command.
Learn how to tag and push container images to a remote registry using the ctr command.
Learn a trick or two about container image labels and how to read them with ctr.