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 simple web server application.
Submissions: 21/29
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.
Official Collection
Challenges crafted by iximiuz Labs to help you master DevOps and Server Side topics.
Challenge, Medium, on
Make a Container Restart Automatically After Docker Host Reboot
Learn how to configure a Docker host and its containers to automatically restart when the server reboots or the Docker daemon restarts.
Submissions: 16/27
Challenge, Medium, on
Make a Container Restart Automatically After Podman Host Reboot
Unlike Docker, Podman is daemonless and requires some extra systemd help to monitor and restart containers. Learn how to configure a Podman host and its containers to automatically restart after a server reboot.
Submissions: 7/8
Challenge, Easy, on
Gracefully Stop a Container With a Lengthy Shutdown Sequence
Learn how to properly stop a Docker container whose application needs more than the default 10 seconds to shut down gracefully.
Submissions: 12/28
Execute Host Commands Inside a Running Container
Leverage your knowledge of Linux namespaces to reach an application's internal debug interface without installing anything into the container.
Submissions: 393/879
Run a Sidecar Container in the Namespace of Another Container
Learn how to run multiple Docker containers sharing the same PID, IPC, and network namespaces - a foundation of many advanced container use cases, including Kubernetes Pods construction and container debugging tools.
Submissions: 181/348
Challenge, Medium, on
Docker 101: Create, Start, Pause, Unpause, Stop, Restart, Kill, and Remove a Container
Explore the key container management operations by walking through all the phases of the container lifecycle - from creation to termination and removal.
Submissions: 255/520
Challenge, Easy, on
Docker 101: Pause and Unpause a Containerized Application
Practice pausing and resuming a running container: start a resource-hungry container, pause it, inspect its state, and then unpause it back to life.
Submissions: 324/616
Docker 101: Signal a Running Containerized Application
Practice using UNIX signals with containers for controlling application behavior: Send a SIGUSR1 to a containerized app to trigger its memory usage reporting.
Submissions: 364/596
Challenge, Easy, on
Docker 101: Restart an Application Container on Failure Automatically
Learn how to configure the restart policy for a container so that it restarts automatically on application failure.
Submissions: 340/530