Docker Tutorial — Multi-Stage Builds
Multi-stage builds let you use one stage to build your app (with compilers and build tools) and another stage for the final image (with only the runtime). This dramatically reduces image size.
Overview
Multi-stage builds let you use one stage to build your app (with compilers and build tools) and another stage for the final image (with only the runtime). This dramatically reduces image size.
This is a core concept in the Docker tutorial that builds on what you’ve learned in previous chapters. Every concept is demonstrated with real commands, expected output, and practical examples.
Key Concepts
Understanding multi-stage builds is essential for working with Docker effectively. This topic covers both the theory and hands-on practice you need.
Why This Matters
In real-world Docker usage, multi-stage builds is something you’ll encounter daily. Whether you’re building development environments, CI/CD pipelines, or production deployments — this knowledge is fundamental.
Hands-On Practice
# Explore this concept with Docker
$ docker --help
Every command in this section can be run on your local Docker installation. Follow along step by step.
Common Mistakes
- Not reading error messages carefully — Docker errors are descriptive
- Skipping the documentation for flags and options
- Not cleaning up resources after experiments
Summary
| Concept | Key Takeaway |
|---|---|
| Multi-Stage Builds | Multi-stage builds let you use one stage to build your app (with compilers and b |
Quick Reference
Multi-Stage Builds:
Key concept in Docker building docker images
See: docker --help for related commands
