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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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Practice pausing and resuming a running container: start a resource-hungry container, pause it, inspect its state, and then unpause it back to life.
Practice pausing (freeze) and resuming (thaw) a resource-hungry Linux process using the cgroup v2 freezer mechanism.
Practice using UNIX signals with containers for controlling application behavior: Send a SIGUSR1 to a containerized app to trigger its memory usage reporting.
Learn how to configure the restart policy for a container so that it restarts automatically on application failure.
Practice mapping existing directories to new paths using Linux bind mounts and see the core tech behind container volumes in action.
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.
Discover why host environment variables aren't visible to containers and how to properly pass them to containerized applications in Docker.
Learn when to use the -t flag in 'docker run' to allocate a pseudo-TTY (terminal) for containers, enabling terminal-specific features like cursor control, colors, and signal handling.
Practice sending binary data to a containerized CLI tool - a helpful scripting pattern you'll often find in CI/CD pipelines and other automation jobs.
Practice configuring Kubernetes to pull images from a private registry and run Pods with authenticated registry access.