Challenge, Easy, on
List All Tags in a Container Repository
Practice discovering what has been published to a remote container repository by listing its tags using crane, regctl, or a direct call to the registry HTTP API.
Submissions: 15/20
Challenges
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.
Challenge, Easy, on
Docker 101: Authenticate to Private Container Registries
Practice using docker login to authenticate against multiple private container registries with different credentials, then pull and push images across them.
Submissions: 28/33
Challenge, Easy, on
Docker 101: Tag and Push Container Images to Registries
Re-tag local container images with fully-qualified references and publish them to different registries using the 'docker tag' and 'docker push' commands.
Submissions: 64/83
Challenge, Easy, on
Docker 101: Pull a Container Image for a Specific Platform
Pull a container image built for a non-native CPU architecture using the 'docker pull --platform' flag.
Submissions: 61/68
Challenge, Easy, on
Docker 101: Pull a Container Image by Digest
Practice pulling a container image using an immutable digest reference instead of a mutable tag.
Submissions: 97/111
Challenge, Easy, on
Docker 101: Pull Container Images from Different Registries
Pull container images using the 'docker pull' command and explore how the image name determines its source registry and repository.
Submissions: 106/122
Write a Dockerfile That Excludes Dev Dependencies from the Production Image
Learn how to keep your container images lean by excluding development dependencies (linters, test frameworks, etc.) from the production build.
Submissions: 118/161
Write a Dockerfile for an Application With System-Level Dependencies
Practice installing OS-level packages during a Docker image build to satisfy system library requirements of your application.
Submissions: 103/127
Write Your First Dockerfile
Learn the absolute basics of Dockerfile authoring by containerizing a simplistic Node.js server application with just three instructions: FROM, COPY, and CMD.
Submissions: 151/201
Write a Dockerfile for a Simple Web Server Application
Learn how to write a Dockerfile from scratch and build a working container image for a web server application with a simple set of dependencies.
Submissions: 173/263