Options Galore: From Source Code to Container Image

A typical workflow in a modern software dev project can look like: Build code, put built artifact into container image, put container image into registry, deploy to Kubernetes. Each step has it’s own requirements and pitfalls alike. The overall goal is most often to bake those steps into easily repeatable pipelines and enable a high degree of automation.

Dockerfiles seems to be the choice with the highest adoption when it comes to containerizing code artifacts. However there are options, which might remove some of the pitfalls and standardize the entire process even more.

The talk will give deeper insights by comparing (multi-stage) Dockerfiles to Cloud-Native Buildpacks (buildpacks.io/paketo.io) and Google’s JIB under the evaluation criteria of build time, build size, standardization, robustness and security. The examples and live demo will have certain focus on Java-based frameworks (Spring Boot, Quarkus, Java EE), but coverage of other languages will also be included and highlighted.

The intented take-away of the session is a better overview of container building and deployment options along with understanding of requirements, advantages and drawbacks.

Transcript

1. Howto: Java & Container Matthias Haeussler, Chief Technologist @maeddes
3. @maeddes | Situation 3
4. @maeddes | Options 4
5. @maeddes | Options 5
6. @maeddes | Lab Repo 6
7. @maeddes | „What is the best Java base container image?“ A developer, Novatec 7
8. @maeddes | „What is the best Java base container image?“ 8
9. @maeddes | „What is the best Java base container image?“ 9
10. @maeddes | 10
11. @maeddes | 11
12. @maeddes | 12
13. @maeddes | 13
14. @maeddes | „What is the best Java base container image?“ 14
15. @maeddes | Container Images as Templates 15
16. @maeddes | Container, Images & Layers 16
17. @maeddes | Docker History 17 [1]
18. @maeddes | Dockerfile 18
19. @maeddes | Alternative Dockerfile 19
20. @maeddes | Alternative Dockerfile (Old) 20
21. @maeddes | Alternative Dockerfile 21
22. @maeddes | Alternative Dockerfile 22
23. @maeddes | „What is the best Java base container image?“ 23
24. @maeddes | „How do you use the base container image?“ 24
25. @maeddes | Code, Build, Container, Deploy 25
26. @maeddes | Code, Build, Container, Deploy 26
27. @maeddes | Code, Build, Container, Deploy 27
28. @maeddes | How? 28
29. @maeddes | Multi-Stage 29 [1]
30. @maeddes | Multi-Stage Dockerfile 30
31. @maeddes | Buildkit 31 [1]
32. @maeddes | 32
33. @maeddes | 33
34. @maeddes | 34 Buildkit Frontend Images - Versions
35. @maeddes | 36 Mount Cache
36. @maeddes | „What makes a (Java) container image good?“ 37
37. @maeddes | • • • • • • Criteria 38
38. @maeddes | The reality … 39
39. @maeddes | Considerations 40
40. @maeddes | Considerations for Java 41
41. @maeddes | Using layered jars 42
42. @maeddes | Full file 43
43. 44 & more …?
44. @maeddes | 45 [2]
46. @maeddes | Jib 47
47. @maeddes | Jib 48
48. @maeddes | Jib 49
49. @maeddes | Considerations - Recap 50
50. @maeddes | Continued strategy 51
51. @maeddes | Jib 52
52. 53 ko
53. 54 Cloud-Native Buildpacks buildpacks.io
54. @maeddes | Buildpacks idea 55
55. @maeddes | History 56
56. @maeddes | Flow 57
57. @maeddes | Rebase 58
58. 59 paketo.io
59. @maeddes | Multi Runtime/Language Support 60 [3]
60. @maeddes | Rebase 61
61. @maeddes | 62 Flow
62. @maeddes | 63
63. @maeddes | „What is the best Java base container image?“ 64
64. @maeddes | „Who owns the image?“ „Who owns the build process?“ 65
65. Demo 66
66. Novatec Consulting GmbH Bertha-Benz-Platz 1 D-70771 Leinfelden-Echterdingen T. +49 711 22040-700 info@novatec-gmbh.de www.novatec-gmbh.de 67 Chief Technologist Matthias Haeussler Mobil: +49 175 222 5949 E-Mail: matthias.haeussler@novatec-gmbh.de Twitter: @maeddes
67. @maeddes | Lab Repo 68
68. Sources @maeddes | § https://www.excalidraw.com § [1] https://docs.docker.com/engine/release-notes/prior-releases/ § [2] https://blog.codecentric.de/en/2020/11/buildpacks-spring- boot/ § [3] https://paketo.io/ § https://buildpacks.io/features/ § https://github.com/GoogleContainerTools/jib § https://www.baeldung.com/docker-layers-spring-boot § https://spring.io/blog/2020/01/27/creating-docker-images-with- spring-boot-2-3-0-m1 § https://github.com/openshift/source-to-image 69