Docker Container Fundamentals (Hands-on) - DevOps

Install Docker on a Linux virtual machine using Google Cloud Platform. Follow steps to install the Docker engine, and configure user permissions to communicate with the Docker daemon.

Explore Docker basics through a hands-on demo: run containers, map ports, connect with curl or browser, manage images and containers, view logs, and clean up with stop and remove commands.

Learn how to build a docker container using the manual method, including running a container, editing inside, committing changes, and pushing the new image to a registry.

Discover how to build a Docker image using the Dockerfile method, from a base image and package installs to copying app code, exposing port 80, and running the Node.js app.

Discover how to run stateful Docker containers with persistent storage volumes by mounting host or external storage into the container, ensuring data persists beyond container lifetimes.

Create a persistent storage volume and map it to a Docker container running MySQL, so database data persists on the host.

Explore docker container networking options, including bridge and overlay networks, and how containers communicate with each other and the external world, with default and user created bridges for isolation.

Explore docker networking by inspecting the default bridge network, creating Alpine Linux containers, and confirming connectivity within the bridge. Learn to attach containers, view IPs, and test gateway routes.

Demonstrate docker networking with a user created bridge, attach Alpine containers, inspect the Alpine network, and verify container connectivity to each other and to the gateway, unlike the default bridge.

Demonstrate how host network maps host interfaces into Docker containers, giving them no unique IP and sharing the host default gateway, with macOS running containers in a Linux VM.

Demonstrate docker none network isolation: containers have no driver, no subnet, no ip, and no external access; apps inside the same container can communicate via localhost, not outside.

Explore how Docker Compose defines multi-container applications in a simple yaml file, then spin up web, backend, and database services with a single command, with automatic dns and coordinated startup.

Learn how Docker Compose automates workflows by mapping the host working directory to the container via a volume, enabling reloads and restarts, live edits, and local testing without rebuilding images.