Interactive Docker Curriculum
Step-by-step interactive lessons with live in-browser terminal exercises, visual container topologies, and self-testing quizzes.
Beginner Core Concepts
What is Docker?
Containers vs Virtual Machines & Core Architecture
Understand the fundamental problem Docker solves, how containers package code and dependencies, and how Docker compares to traditional Virtual Machines.
Docker Images & Layers
Blueprints, Registries, Layers & Immutability
Understand what a Docker image is, how layered storage makes builds fast and efficient, and how to pull and manage images.
Container Lifecycle & Management
Running, Stopping, Inspecting, and Removing Containers
Master container execution, status transitions (Created, Running, Stopped, Exited), and core management commands.
Mastering `docker run` Flags
Environment Variables, Auto-removal, Restart Policies & Memory Limits
Deep dive into every essential flag of docker run: environment injection, restart policies, resource quotas, and cleanup options.
Ports & Port Publishing
Host Port vs Container Port Mapping & Network Address Translation
Demystify port publishing (`-p host:container`). Learn how Docker bridges external traffic into isolated container namespaces.
Intermediate Developer Workflow
Container Networking & Embedded DNS
Custom Bridges, Service Discovery, and Why localhost Fails Between Containers
Discover how containers communicate. Master custom bridge networks and Docker internal DNS resolution by container name.
Volumes & Data Persistence
Named Volumes vs Bind Mounts & Ephemeral Storage
Learn how to persist database data and file uploads beyond container lifecycles using Named Volumes and Host Bind Mounts.
Writing Dockerfiles & Build Cache
FROM, WORKDIR, COPY, RUN, CMD & Cache Optimization
Write declarative Dockerfiles, understand instruction ordering, optimize layer caching, and build images with `docker build`.
Docker Compose Multi-Container Orchestration
YAML Service Definitions, Dependencies & One-Command Environments
Define multi-container applications (Frontend + Backend + DB) declaratively in `compose.yaml` and orchestrate them with `docker compose up`.
Advanced Compose & Diagnostics
Debugging & Troubleshooting Containers
Logs, Shell Exec, Exit Codes & Diagnostic Workflows
Master container diagnosis using `docker logs`, `docker exec -it`, `docker inspect`, and exit code analysis.
Bridge to Kubernetes (K8s)
From Single Host Containers to Distributed Cluster Orchestration
Connect Docker concepts to Kubernetes primitives: Containers -> Pods, Compose Services -> Deployments, Port Mappings -> Services & Ingress.
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