Docker Training — Container Fundamentals, Image Engineering & CI/CD Integration

What Is Docker?

Docker revolutionized software delivery by making containers accessible to every developer. Docker packages applications and their dependencies into lightweight, portable containers that run consistently anywhere — laptop, data center, or cloud. Docker introduced the now-universal container workflow: build an image, push to a registry, pull and run anywhere. While Kubernetes has become the orchestration standard, Docker (and OCI-compatible alternatives like Podman) remains the foundation — every Kubernetes pod runs containers, every CI/CD pipeline builds Docker images.

Who Should Attend

• Software engineers who want to containerize their applications
• DevOps engineers building container-based CI/CD pipelines
• System administrators managing containerized infrastructure
• Anyone preparing for Kubernetes — Docker fundamentals are a prerequisite

Learning Outcomes

• Write production-quality Dockerfiles with multi-stage builds, layer optimization, and security best practices
• Manage the container lifecycle — run, stop, inspect, debug, and orchestrate with Docker Compose
• Push and pull images from Docker Hub, AWS ECR, Azure ACR, and private registries
• Implement container networking — bridge, overlay, host, and custom networks
• Manage persistent data with volumes and bind mounts
• Integrate Docker into CI/CD pipelines — build, scan, push, deploy
• Scan container images for vulnerabilities with Trivy and implement image signing

Course Modules

1. Docker Fundamentals — Architecture (daemon, client, registry). Images vs. containers. Docker Hub. Basic commands.
2. Dockerfile Engineering — Instructions (FROM, RUN, COPY, CMD, ENTRYPOINT). Multi-stage builds. Layer caching. Best practices.
3. Image Optimization — Minimizing layers. Distroless images. Alpine vs. Debian. BuildKit features. Image size reduction.
4. Docker Compose — Multi-service applications. Compose file v3. Networking in Compose. Environment variables. Profiles.
5. Container Networking — Bridge, host, overlay, macvlan. DNS. Port mapping. Network troubleshooting.
6. Storage & Volumes — Volumes vs. bind mounts. tmpfs. Volume drivers. Backup and restore. Stateful containers.
7. Docker in CI/CD — Building images in Jenkins/GitHub Actions. Image tagging strategies. Registry integration. Security scanning.
8. Capstone: Dockerized Application — Build, optimize, scan, and deploy a multi-service application with Docker Compose and CI/CD.

Hands-on Labs (18 total)

Write a multi-stage Dockerfile for a Node.js/Java/Python application. Reduce image size by 70% with distroless and layer optimization. Deploy a multi-service application with Docker Compose. Set up a private registry. Integrate Docker build+scan into a GitHub Actions pipeline.

Related Courses

See Kubernetes Training, CloudOps Training, and DevOps Engineering.