Focused, hands-on DevOps and server-side problems with hints, feedback, and automated solution checks.
A Go service that has always been shipped as a static binary in a scratch-y image suddenly fails to start in a container, while the local build works as before. Find what recent changes caused it and fix the image without reverting them.
An ultimate Kubernetes troubleshooting challenge: can you copy files to/from a running Pod that doesn't have a shell or other command line tools installed?
Can you edit a file in a running Kubernetes pod? What if there is no shell inside and the container's user lacks the write permission?
Not all distroless images are created equal. Can you find the right base image for the application in this challenge?
Learn how to send a signal to a Kubernetes app running in an unprivileged container without shell.
