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Containers

Package an app once and run it anywhere.

8 lessons ready2 modulesabout 2 hours28 quiz questions
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Module 1

Why containers

Beginner
  1. 1Virtual machines vs containersA full computer each, or just the app: start, count, and attack them to see the trade-off.
  2. 2Docker vs KubernetesThey are not rivals. Docker runs containers; Kubernetes keeps whole fleets of them running.

Module 2

Docker in practice

Intermediate
  1. 3Docker images and layersWhat an image really is: a stack of read-only layers, shared between images, named by repository and tag.
  2. 4Write a DockerfileTurn a Python app into an image: FROM, WORKDIR, COPY, RUN, CMD. Then make rebuilds take seconds instead of a minute by ordering the steps well.
  3. 5Docker networkingPublish ports so the world can reach a container, and put containers on one network so they find each other by name.
  4. 6Docker volumesContainers forget everything when removed. Keep a database's data safe in a named volume, and mount your own folder for development.
  5. 7Docker ComposeDescribe an app and its database in one compose.yaml, and start, inspect and stop the whole thing with one command.
  6. 8Container registriesShip your image: name it for a registry, log in, push it, and pull it anywhere. Docker Hub, GitHub Container Registry and AWS ECR.
✓Final examTest yourself on the whole Containers trackQuestions drawn from every lesson, a new mix each time. Score 70% to pass. Start the exam →

New videos come out on YouTube @deployskool. Lessons marked "video coming soon" are complete already: the video is the bonus.