Continuous Delivery su progetti Java: cosa abbiamo imparato facendoci del male

In questa presentazione io e Paolo D'Incau condividiamo esperienze reali tratte da progetti dove applichiamo pratiche di Continous Delivery.
Raccontiamo di come si può far evolvere iterativamente una pipeline partendo da semplici task (build e deploy mono-ambiente) fino ad arrivare ad unica pipeline multi-ambiente ispirata allo stato dell'arte e alle lezioni che abbiamo imparato facendoci del male.
Forniamo esempi concreti, focalizzandoci sugli aspetti relativi al codice, all'infrastruttura e rapporto con gli stakeholders.

Autori: Paolo D'Incau, Pietro Di Bello

Transcript

1. Continuous Delivery in Java Cose che abbiamo imparato facendoci del male Codemotion Milano ‘15
2. @pdincau Here We Are @pierodibello
3. Continuous Delivery? What is
4. “Continuous Delivery is a software development discipline where you build software in such a way that the software can be released to production at any time. ” Martin Fowler* * martinfowler.com/bliki/ContinuousDelivery.html
5. “Continuous Delivery is nothing more than reducing the stress you get when you deliver business value to the customer ” My Team* * Come and ask!
6. n t Continuous Delivery... What is
7. Continuous Integration
8. Continuous Deployment
9. “Safety” Deploy rules
11. Technically Speaking
12. Deploy any specific working version to production with confidence
13. 3 ways
14. Rodeo Style
15. No tests Manual deploy Snowflake environments Non predictable outcome Few or very little collaboration
16. Rodeo Style
17. By the book
18. Fast Feedback Done is released Shared responsibility Everything is automated Repeatable and reliable process
19. Start small and iterate
20. Once upon a time...
21. We did know...
22. Previous deployment process was painful Database continuously change Different environments
23. Iteration n.1 No Automation
24. Environment replica on AWS Manual build Manual DB migrations Deploy with scp to remote JBoss
25. It was our own choice...
26. ...but we felt like this
27. No automation at all When was our last deploy?
28. A taste of Automation Iteration n.2
29. Set up a basic Jenkins installation Test and build triggered on push DB migration using Liquibase Task to deploy on AWS
30. This worked for a while
31. Errors in MyBatis DB mappers Wrong/Missing wirings
32. Meanwhile...
33. Yay! Environments are ready!
34. Deploy Everywhere Iteration n.3
35. New Jenkins job to run integration tests Track slowest tests First official deploy an all environments
36. …with different DB drivers !#$?!
37. Duplication
38. Incorrect use of mvn profiles N-builds for N-environments Long build and deploy time
39. Single Artefact Iteration n.4
40. Got rid of configurations using JBoss *Unique* artefact for all environments Deploy version X.Y.Z from Nexus
41. We started getting fast
42. But QA were not so happy Branches, branches everywhere!
43. Make them happy Iteration n.5
44. An environment for QA Tags over branches Track deployed version
45. Devs love QAs
46. Acceptance tests
47. Explained values and motivations to Product Owner
48. Self-service deploy
49. Remove Candidate Clean Up Clean Up Build it... Migrate ! Database Fetch Unit Tests Build Build Integration Test ! Integration Deploy Publish UAT QA and Publish
50. Frontend Angular ! Web ...and deliver it Deploy ESB ! ESB Deploy staging ! Deploy Staging Deploy API Deploy Core Backend Migrate ! Database
51. Things we are experimenting
52. Parallelization Environments Provisioning Jenkins under git Squash migrations to snapshot
53. What we would do differently...
54. Pipeline with “placeholders” Extract configurations asap Explain at the beginning the values behind
55. Things we will keep doing...
56. Build the pipeline iteratively Share pipeline responsibility Use the tool that best fit your needs
57. Recommended reading
58. Take a look at these Real-World Strategies for Continuous Delivery with Maven and Jenkins https://www.youtube.com/watch?v=McTZtyb9M38 Visualizations of Continuous Delivery http://continuousdelivery.com/2014/02/visualizations-of-continuous-delivery/
63. That’s all!
64. @pdincau @pierodibello
65. https://creativecommons.org/licenses/by-nc-sa/3.0/ Thanks!