𝗗𝗼𝗰𝗸𝗲𝗿 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 𝟮𝟬𝟮𝟲
1. Container Fundamentals
Start by understanding why containers exist and how Docker solves real-world problems.
🔹 Containers vs Virtual Machines
🔹 Images, containers, registries
🔹 Docker architecture (Client, Daemon, Engine)
🔹 OCI standards and container runtimes
2. Docker Installation & CLI
Get comfortable working with Docker daily.
🔹 Installing Docker on Linux, macOS, Windows
🔹 Core commands: build, run, exec, logs, ps, rm
🔹 Image vs container lifecycle
🔹 Docker contexts & environments
3. Docker Images & Dockerfiles
Images are the heart of Docker — master them deeply.
🔹 Dockerfile syntax & instructions
🔹 Layered filesystem & caching
🔹 Multi-stage builds
🔹 Image tagging & versioning
🔹 Best practices for small, secure images
4. Docker Volumes & Storage
Persist and manage data correctly.
🔹 Volumes vs bind mounts
🔹 Data persistence strategies
🔹 Backup and restore container data
🔹 Volume drivers & storage plugins
5. Docker Networking
Enable container communication and isolation.
🔹 Bridge, host, overlay, none networks
🔹 Container-to-container communication
🔹 Exposing ports & service discovery
🔹 DNS inside Docker networks
6. Docker Compose
Run multi-container applications locally and in staging.
🔹 Compose file structure (docker-compose.yml)
🔹 Services, networks, volumes
🔹 Environment variables & secrets
🔹 Scaling services with Compose
7. Security & Hardening
Security is critical in modern containerized systems.
🔹 Least-privilege containers
🔹 Non-root users
🔹 Image scanning & vulnerability checks
🔹 Secrets management
🔹 Seccomp, AppArmor, capabilities
8. Docker Build Optimization
Build faster, safer, and smarter.
🔹 BuildKit internals
🔹 Cache mounts & secret mounts
🔹 Parallel builds
🔹 Reducing image size & attack surface
9. Docker Registries
Store and distribute images efficiently.
🔹 Docker Hub & private registries
🔹 Amazon ECR, Google Artifact Registry
🔹 Image signing & verification
🔹 Registry security & access control
10. Docker in CI/CD Pipelines
Docker is a core DevOps building block.
🔹 Dockerized builds & tests
🔹 CI/CD with GitHub Actions, GitLab CI, Jenkins
🔹 Image promotion strategies
🔹 Blue/Green & Canary workflows
11. Docker & Kubernetes
Understand Docker’s role in cloud-native ecosystems.
🔹 Docker vs containerd
🔹 Kubernetes container runtime model
🔹 Building images for Kubernetes workloads
🔹 Local Kubernetes with Docker Desktop
12. Observability & Debugging
Operate containers confidently in production.
🔹 Logging strategies
🔹 Metrics & monitoring containers
🔹 Debugging running containers
🔹 Resource limits & performance tuning
13. Production Best Practices
Run Docker reliably at scale.
🔹 Immutable infrastructure patterns
🔹 Health checks & restart policies
🔹 Resource constraints (CPU, memory)
🔹 High availability considerations
14. Real-World Docker Projects
Apply your skills with hands-on experience.
🔹 Containerize full-stack applications
🔹 Microservices with Docker Compose
🔹 CI/CD pipelines using Docker
🔹 Secure production-ready images
15. Future of Docker (2026 )
Stay ahead of the curve.
🔹 Docker AI/ML workloads
🔹 WebAssembly (Wasm) & containers
🔹 Supply chain security (SBOMs)
🔹 Platform engineering & internal developer platforms
Go deeper with advanced concepts, real projects, optimization techniques, and production patterns in this Docker ebook:
codewithdhanian.gumroad.com/…