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, Easy, on Containers

Gracefully Stop a Container With a Lengthy Shutdown Sequence

by Ivan Velichko

Learn how to properly stop a Docker container whose application needs more than the default 10 seconds to shut down gracefully.

docker container-runtime os-signal debugging

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes

Resolve ContainerCreating Issue Caused by Missing ConfigMap

by Omkar Shelke

A Deployment is stuck with Pods in ContainerCreating state because the required ConfigMap was not created. Fix the issue to make the application accessible.

ckad cka troubleshooting configmap debugging

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Troubleshoot a Website That Is Not Accessible

by Omkar Shelke

A web application is deployed but the website is not accessible. Investigate and fix the issue.

ckad cka troubleshooting service debugging

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

Challenge, Medium, on Containers, Linux

Execute Host Commands Inside a Running Container

by Ivan Velichko

Leverage your knowledge of Linux namespaces to reach an application's internal debug interface without installing anything into the container.

docker debugging distroless nsenter

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

Challenge, Medium, on Containers, Linux

Run a Sidecar Container in the Namespace of Another Container

by Ivan Velichko

Learn how to run multiple Docker containers sharing the same PID, IPC, and network namespaces - a foundation of many advanced container use cases, including Kubernetes Pods construction and container debugging tools.

docker container-runtime namespaces debugging

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

Challenge, Medium, on Containers

Docker 101: Execute Commands in a Running Container

by Ivan Velichko

Learn how to execute commands inside running containers using 'docker exec' - a crucial skill for debugging containerized applications and exploring container environments.

docker containers-101 container-runtime debugging

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

Challenge, Easy, on Containers, Linux

Ensure a Graceful Termination for a Containerized Node.js Application

by Ivan Velichko

Can you resolve issues with a Node.js container's termination process to ensure graceful shutdown on 'docker stop'?

docker container-image debugging os-signal node.js

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

Challenge, Medium, on Containers, Linux

Ensure a Graceful Termination for a Container With an Entrypoint Script

by Ivan Velichko

Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?

docker container-image debugging os-signal go

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

Challenge, Hard, on Containers, Kubernetes

Copy Files To/From a Running Kubernetes Pod: a Distroless Image Case

by Ivan Velichko

An ultimate Kubernetes debugging challenge: can you copy files to/from a running Pod that doesn't have a shell or other command line tools installed?

kubectl distroless debugging

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

Challenge, Easy, on Containers, Kubernetes

Copy Files To/From a Running Kubernetes Pod: a Simple Case

by Ivan Velichko

Practice copying files to/from running Kubernetes Pods to become a Kubernetes troubleshooting ninja.

kubernetes-101 kubectl debugging