Curated lists of practical challenges sprinkled with a little bit of theory and lots of colorful diagrams to help you learn more efficiently. Skill paths are short roadmaps which you can use to develop or improve a specific skill such as container debugging or Linux network administration.
Do you want to troubleshoot container and Kubernetes networking issues like a true expert? This is a highly practical learning path that will take you from the basics of container networking like creating a network namespace, to more complex topics like configuring a bridge network and using iptables to set up network address translation (NAT) and port forwarding.
Practice building container images, choosing the right base image, organizing multi-stage Dockerfiles, and troubleshooting common issues caused by flawed image composition.
Practice copying container images from one repository to another using the docker, crane, skopeo, and regctl tools.
Start with learning how to limit process resources in Linux using cgroups - from the most basic and labour-intensive cgroupfs manipulation to the handiest systemd-run command. After that, explore how Docker and Kubernetes use cgroups to control resource usage of containers and pods.