Online Docker Playground

Practice Now


LabEx provides a Docker Playground environment where users can quickly experience Docker-related technologies. The Docker Playground runs on an Ubuntu 22.04 operating system, offering a convenient platform for users to explore and learn Docker.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL docker(("`Docker`")) -.-> docker/ContainerOperationsGroup(["`Container Operations`"]) docker/ContainerOperationsGroup -.-> docker/run("`Run a Container`") subgraph Lab Skills docker/run -.-> lab-372912{{"`Online Docker Playground`"}} end

How to Use the Docker Playground

The Docker Playground offers three user interfaces: VS Code, Desktop, and Web Terminal. Users can choose the interface that best suits their preferences and experience level.

VS Code Interface

  1. Log in to the LabEx platform and access the Docker Playground.
  2. In the Docker Playground, select the "VS Code" interface.
  3. The VS Code environment will be loaded, providing a familiar code editing experience.
  4. Within the VS Code interface, users can create a new Docker project or open an existing one.

To create a "Hello World" Docker project, follow these steps:

  • Open a new file and name it "Dockerfile".
  • In the Dockerfile, add the following content:
FROM ubuntu:22.04
RUN apt-get update && apt-get install -y nginx
CMD ["nginx", "-g", "daemon off;"]
  • Save the Dockerfile.
  • Open a new terminal within the VS Code interface.
  • Run the following commands to build and run the Docker container:
docker build -t hello-world .
docker run -d -p 80:80 hello-world

Access the "Hello World" application by opening a web browser and navigating to http://localhost.

Docker Playground

Desktop Interface

  1. Log in to the LabEx platform and access the Docker Playground.
  2. In the Docker Playground, select the "Desktop" interface.
  3. The Docker Playground will load a desktop environment, similar to a traditional operating system.
  4. Within the Desktop interface, users can access the terminal and follow the same steps as in the VS Code interface to create and run the "Hello World" Docker project.

Web Terminal Interface

  1. Log in to the LabEx platform and access the Docker Playground.
  2. In the Docker Playground, select the "Web Terminal" interface.
  3. The Web Terminal will provide a command-line interface for interacting with the Docker Playground.
  4. Within the Web Terminal, users can follow the same steps as in the VS Code and Desktop interfaces to create and run the "Hello World" Docker project.

Docker Skill Tree on LabEx

The Docker Skill Tree on LabEx is structured into several skill groups, each containing specific skills. Here's an organized overview:


Foundational Docker concepts:

  • Introduction to Docker: Understanding the purpose and benefits of Docker.
  • Docker Architecture: Key components like the Docker daemon, images, and containers.
  • Docker Installation: Setting up Docker on different operating systems.
  • Docker Commands: Basic commands for managing Docker containers and images.
  • Docker Containers: Creating, running, and managing Docker containers.
  • Docker Images: Building, sharing, and managing Docker images.

Docker Containers

Deeper dive into working with Docker containers:

  • Container Lifecycle: Starting, stopping, and removing containers.
  • Container Networking: Connecting containers and exposing ports.
  • Container Volumes: Persisting data outside of containers.
  • Container Environment Variables: Configuring container settings.
  • Container Logs: Accessing and managing container logs.
  • Container Resource Limits: Controlling resource usage of containers.

Docker Images

Advanced topics related to Docker images:

  • Dockerfile Basics: Defining custom Docker images using Dockerfiles.
  • Dockerfile Instructions: Understanding and using Dockerfile commands.
  • Image Layers: Optimizing image size and build times.
  • Image Tagging and Versioning: Versioning and managing image tags.
  • Image Registries: Storing and retrieving Docker images.
  • Multi-stage Builds: Optimizing image build process.

Docker Compose

Orchestrating multi-container applications:

  • Compose File Syntax: Defining application services in a YAML file.
  • Compose Commands: Managing applications with Docker Compose.
  • Networking in Compose: Connecting services within a Compose application.
  • Volumes in Compose: Persisting data for Compose services.
  • Environment Variables in Compose: Configuring service settings.
  • Scaling Services: Scaling individual services in a Compose application.

Docker Swarm

Building and managing Docker clusters:

  • Swarm Mode: Enabling Swarm mode in Docker.
  • Swarm Nodes: Managing Swarm nodes (managers and workers).
  • Swarm Services: Deploying and scaling services in a Swarm.
  • Swarm Networking: Configuring networks for Swarm services.
  • Swarm Volumes: Persistent storage for Swarm services.
  • Swarm Secrets: Securely managing sensitive data in a Swarm.

Docker Security

Securing Docker environments:

  • Image Security: Scanning and securing Docker images.
  • Container Security: Hardening and securing Docker containers.
  • Network Security: Securing Docker network communications.
  • Secrets Management: Storing and using sensitive data securely.
  • Vulnerability Scanning: Identifying and addressing security vulnerabilities.
  • Compliance and Policies: Enforcing security policies in Docker environments.

For hands-on labs and more detailed learning, visit the Docker Skill Tree.

Docker Playground FAQ

What are the benefits of using Docker over traditional deployment methods?

Docker provides a consistent, reliable, and scalable way to package and deploy applications. It allows you to create and manage containerized applications, ensuring they run the same way across different environments, from development to production. This helps to eliminate the "it works on my machine" problem and streamlines the deployment process.

Why use an Online Docker Playground?

An online Docker Playground offers a convenient way to experiment with Docker without the need to set up a local Docker environment. It provides a pre-configured, ready-to-use platform where you can learn, test, and build Docker-based applications directly in your web browser.

How does the LabEx Docker Playground differ from other online Docker tools?

The LabEx Docker Playground goes beyond a simple Docker sandbox. It offers a comprehensive development environment with multiple interfaces (VS Code, Desktop, Web Terminal) and the ability to work on full-fledged Docker-based projects, including building and running complex web and desktop applications.

Can I use the Docker Playground for professional development?

Yes, the Docker Playground is designed to support professional-level development. It provides the necessary tools, environments, and capabilities to enable you to work on complex, production-ready Docker-based applications entirely within the online platform.

Is the Docker Playground suitable for beginners?

Absolutely! The Docker Playground is user-friendly and accessible, making it an excellent choice for beginners to learn and practice Docker. The intuitive interface, combined with comprehensive resources and tutorials, ensures a smooth learning experience for users of all skill levels.


The LabEx Docker Playground offers a convenient and accessible way for users to explore and learn Docker. With three different user interfaces (VS Code, Desktop, and Web Terminal), the Playground caters to a wide range of user preferences and experience levels. By following the steps outlined in this document, users can quickly set up and run a "Hello World" Docker project, gaining hands-on experience with Docker's capabilities.

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