Kube Mysteries: The Invisible Pod
Did you know that pods can become invisible? Can you figure out how?
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.
Did you know that pods can become invisible? Can you figure out how?
In this challenge, you’ll debug and fix a deliberately “broken” eBPF program, then prove it’s running by identifying its program and map IDs. Along the way, you’ll explore bpftool, check which helpers are supported, and dig into details like the UID of the loader. Finally, you’ll test your knowledge of eBPF maps by recalling the flag that only inserts a key if it doesn’t already exist.
Practice the fundamental lifecycle of a Kubernetes Pod: creation, inspection (IP, node), interaction (executing commands, checking logs), and deletion.
Get hands-on with reading secrets from different providers and using them in your Dagger pipelines.
Learn how to install, update and uninstall Dagger module dependencies.
This exercise tests your ability to safely upgrade a multi-node Kubernetes cluster from version 1.30 to 1.31 following the standard upgrade procedure.
This exercise tests your ability to configure kubernetes network policies to make sure only pods with specific labels can communicate with each other.
Learn how to use Docker Scout to analyze and remediate vulnerabilities in a container image.