Docker: multi-stage multi-environment

Transcript

1. Docker: Multi-stage multi-environment Abdala Cerqueira

2. Dockerfile

3. FROM COPY --from= docker build --target

4. Problems

5. Problem 1 • Keep different Dockerfiles per environment • !

   dev tools and dependencies on production

6. Problem 2 • Big, huge, immense images • One or

   two commands may leave images out of control

7. Dependencies

8. Checklist • Have only one Dockerfile • Use the same

   Dockerfile for all environments (dev, test, prod) • Create small images • Manage less dependencies

9. Official PHP image • One Dockerfile • All environments •

   Small images • Less dependencies Time: ~39s Size: 430MB Security problems

10. Multi-stage

11. Official PHP image multi-stage • One Dockerfile • All environments

    • Small images • Less dependencies Time: ~40s Size: 393MB Not that small, hidden dependencies

12. Alpine image • One Dockerfile • All environments • Small

    images • Less dependencies Time: ~11s Size: 59.4MB Still have unwanted dependencies

13. Alpine image multi-stage • One Dockerfile • All environments •

    Small images • Less dependencies Time: ~16s Size: 35.8MB This is ART <3

14. Comparison table Image Time Size alpine:3.8 - 4.41 MB php:7.2-apache

    - 377 MB laravel-apache 39s 430 MB laravel-apache-multi 40s 393 MB laravel-alpine 11s 59.4 MB laravel-alpine-multi 16s 35.8 MB

15. Conclusion • Care about dependencies • Try different techniques

16. Thanks!