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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.
Challenges
Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Docker 101: Stop and Restart a Containerized Application Preserving Its Data
Learn the difference between stopping and permanently removing containers while operating a personal finance tracker application.
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Docker 101: List Containers and Identify Running, Successfully Finished, and Crashed Tasks
Practice listing containers and inspecting their state to identify running, exited, and crashed applications - a vital skill for day-to-day operation of containerized systems.