Challenge,Ā Easy, Ā onĀ Containers
Build and Publish a Container Image With Docker
Learn how to perform one of the most basic Docker operations - build and publish a container image.
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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.
Learn how to perform one of the most basic Docker operations - build and publish a container image.
Learn how to leverage Docker to copy a container image from one repository to another.
Prove your SRE skills - deploy a resource-greedy application to a Kubernetes cluster and make it run for a while without disrupting the service.
Start a Linux process and limit its CPU and memory usage with cgroups.
Learn how to use Docker Scout to analyze and remediate vulnerabilities in a container image.
Learn how to start using Dagger in your project. Practice by creating your first Dagger module and adding some functions to it.
In this simple challenge, you will learn how to install the Dagger CLI on a Linux machine with Docker already running.
Practice copying files to/from running Kubernetes Pods to become a Kubernetes troubleshooting ninja.
Practice copying files to/from running containers to become a container troubleshooting wizard.
Practice your container debugging skills by editing a file in a running container.
Learn how to send a signal to an application running as a Kubernetes pod.
Explore how nerdctl tries to look like Docker when it comes to UX. Are containers started with nerdctl any different from those started with Docker š³?
Start a container using an alternative container runtime - Podman. Shouldn't be too hard if you already know how to start a container with Docker š³
Perform the most fundamental Docker operation - start a container. Sounds too easy? Be ready to also answer a few tricky questions about it!
Prove your networking skills by mapping one network address to another using socat.
Learn how to create fully isolated virtual network environment using Linux network namespaces.
Learn how to label container images using the `ctr` command.
Learn how to pull container images from different registries using the ctr command.
Learn how to tag and push container images to a remote registry using the ctr command.
Learn how to work with containerd namespaces using the ctr command-line client.