Containers

Images, layers, the build cache, volumes, networking and users — and how to build a small image that stops cleanly.

10 lessons · about 80 minutes

What you'll go through

• 01It works on my machine, and that stopped being funny8 min
• 02Your container is a process, not a small computer8 min
• 03Why the image is 1.2 GB and the application is 12 MB8 min
• 04The same build takes four seconds or four minutes8 min
• 05Ctrl-C does nothing and the container takes ten seconds to die8 min
• 06You restarted the container and the database is empty8 min
• 07localhost inside the container is not your localhost8 min
• 08The secret you removed is still in the image8 min
• 09Everything runs as root, including the mistake8 min
• 10From 1.2 GB to 80 MB without breaking anything8 min

Included in this pack

Kubernetes — Containers, the Kubernetes model and how to diagnose a failing cluster. Three courses, 32 lessons.

Also in this pack

Kubernetes Fundamentals

Reconciliation, pods, deployments, services, ingress, config and secrets, requests and limits, probes, storage and RBAC.

12 lessons · ~100 min$19.90

Kubernetes Troubleshooting

Pending, ImagePullBackOff, CrashLoopBackOff, exit code 137, lying probes, empty Services, cluster DNS, evictions and stuck rollouts.

10 lessons · ~85 min$19.90