Docker Tutorial

Start learning Docker →

Course Contents

Docker Fundamentals

• Docker Introduction
• Installing Docker
• How Docker Works (Images, Containers, Layers)
• Containers vs Virtual Machines
• Docker Get Started (Hello World)
• The Docker Architecture (Daemon, Client, Registry)

Working with Images

• Docker Images Explained
• docker pull
• docker images and Image IDs
• docker rmi and Removing Images
• Image Tags and Versioning
• Docker Hub and Image Registries

Running Containers

• docker run
• Common docker run Flags
• docker ps and Container Status
• docker stop, start, restart
• docker rm and Removing Containers
• docker exec and Interactive Shells
• docker logs

The Dockerfile

• Writing Your First Dockerfile
• FROM and Base Images
• RUN, COPY, and ADD
• WORKDIR, ENV, and ARG
• EXPOSE, CMD, and ENTRYPOINT
• docker build
• Dockerfile Best Practices

Image Layers and Caching

• Understanding Image Layers
• The Build Cache
• Multi-Stage Builds
• Reducing Image Size
• .dockerignore

Data and Storage

• Docker Volumes
• Bind Mounts vs Volumes
• Managing Volumes
• Persisting Database Data in Containers
• tmpfs Mounts

Networking

• Docker Networking Basics
• Port Mapping with -p
• Bridge, Host, and None Networks
• Creating Custom Networks
• Container-to-Container Communication

Environment and Configuration

• Environment Variables in Containers
• Using .env Files
• Docker Secrets
• Resource Limits (CPU and Memory)
• Restart Policies

Docker Compose

• Docker Compose Introduction
• The docker-compose.yml File
• docker compose up and down
• Multi-Service Applications with Compose
• Compose Networks and Volumes
• Compose Environment Variables and .env
• Scaling Services with Compose

Debugging and Inspecting

• docker inspect
• docker stats
• Debugging a Failing Container
• Copying Files with docker cp
• Health Checks

Docker for Application Development

• Dockerizing a Node.js Application
• Dockerizing a Python Application
• Development vs Production Images
• Hot Reload in a Container
• Connecting a Containerized App to a Database

Registries and Distribution

• docker tag
• docker push
• Private Registries
• Docker Hub Automated Builds
• Image Scanning and Vulnerabilities

Docker Security

• Docker Security Basics
• Running Containers as Non-Root
• Read-Only Filesystems
• Limiting Container Capabilities
• Keeping Secrets Out of Images

Orchestration Basics

• Why Orchestration? From Compose to Clusters
• Docker Swarm Basics
• Introduction to Kubernetes Concepts
• Choosing Compose vs Swarm vs Kubernetes

CI/CD and Best Practices

• Using Docker in CI/CD Pipelines
• Docker Layer Caching in CI
• Common Docker Mistakes
• Cleaning Up Docker Disk Usage
• Docker Command Reference