Challenges

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.

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Find challenges matching your interests...

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Containers

Build and Inspect a Container Image With Docker

by Ivan Velichko

Build a container image from a Dockerfile and use Docker commands to inspect its size and layer composition.

docker container-image dockerfile containers-101

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Containers, Programming

Build and Compile Applications in Dockerfiles

by Ivan Velichko

Practice building and compiling applications inside their Dockerfiles by containerizing a Go backend and a TypeScript frontend.

docker container-image containers-101 dockerfile go

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Containers, Programming

Write a Dockerfile That Excludes Dev Dependencies from the Production Image

by Ivan Velichko

Learn how to keep your container images lean by excluding development dependencies (linters, test frameworks, etc.) from the production build.

docker container-image containers-101 dockerfile node.js

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Containers, Programming

Write a Dockerfile for an Application With System-Level Dependencies

by Ivan Velichko

Practice installing OS-level packages during a Docker image build to satisfy system library requirements of your application.

docker container-image containers-101 dockerfile python

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Containers, Programming

Write Your First Dockerfile

by Ivan Velichko

Learn the absolute basics of Dockerfile authoring by containerizing a simplistic Node.js server application with just three instructions: FROM, COPY, and CMD.

docker container-image containers-101 dockerfile node.js

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Containers, Programming

Write a Dockerfile for a Simple Web Server Application

by Ivan Velichko

Learn how to write a Dockerfile from scratch and build a working container image for a web server application with a simple set of dependencies.

docker container-image containers-101 dockerfile node.js

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Containers

Make a Container Restart Automatically After Docker Host Reboot

by Ivan Velichko

Learn how to configure a Docker host and its containers to automatically restart when the server reboots or the Docker daemon restarts.

docker containers-101 container-runtime

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Containers

Make a Container Restart Automatically After Podman Host Reboot

by Ivan Velichko

Unlike Docker, Podman is daemonless and requires some extra systemd help to monitor and restart containers. Learn how to configure a Podman host and its containers to automatically restart after a server reboot.

podman containers-101 container-runtime

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Containers

Docker 101: Create, Start, Pause, Unpause, Stop, Restart, Kill, and Remove a Container

by Ivan Velichko

Explore the key container management operations by walking through all the phases of the container lifecycle - from creation to termination and removal.

docker containers-101 container-runtime container-rootfs

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Containers

Docker 101: Pause and Unpause a Containerized Application

by Ivan Velichko

Practice pausing and resuming a running container: start a resource-hungry container, pause it, inspect its state, and then unpause it back to life.

docker containers-101 container-runtime cgroups