A case study on how to reduce continuous delivery cycle time by using your local resources as the starting point for the continuous delivery Jenkins Pipeline. Your local box has spare CPU, memory and a Git repo to be used with a local Jenkins Pipeline. You get fast feedback and create lots of precious artifacts.

1. Local Pipeline to Reduce Cycle Time
Fabio Ponciroli
(YOOX NET-A-PORTER GROUP)
Luca Milanesio
(GerritForge)

2. About YOOX NET-A-PORTER GROUP

3. About YOOX NET-A-PORTER GROUP

4. About GerritForge
• Founded in the UK
• HQ in London, Offices in the USA, Italy, Germany
• Committed to OpenSource

5. Agenda
• The insane idea
• YNAP Case-Study – Demo
• Problems to be resolved
• Overall architecture
• Jenkins pipeline (central + local)
• Just-in-time UAT
• Cooperation central vs. local
• Pipeline + plugins + code = same branch !
• Q&A

6. The insane idea
WHY NOT …
RUNNING JENKINS ON YOUR CLIENT?
Image from https://mybroadband.co.za/news/wp-content/uploads/2014/11/Crazy-ideas.jpg

7. Clients CPU are getting faster
• 18 cores in a Mac …it's not a typo
Image from https://www.apple.com/uk/imac-pro/

8. "Works for me" problem
• Typical excuse for a broken build?
Image from http://teehunter.com/wp-content/uploads/2016/07/shrug-it-works-on-my-machine-programmer-excuse-design-white-on-black-75501.jpg

9. Overall architecture
Central Pipeline
Local Pipeline
Local Pipeline

10. Cooperation central vs. local

11. YNAP Case-Study – Demo

12. Problems to be resolved (1)
Non repeatable builds
(allocated slaves with reused workspace)

13. Problems to be resolved (2)
Merging of companies
(we were two … and now we are YNAP-one)

14. Problems to be resolved (3)
Need for fast feedback
(I want the results NOW !)

15. Problems to be resolved (5)
One master cannot suit all
(Central CI not flexible to local teams needs)

16. Problems to be resolved (6)
We want to scale more
(Teams grow, one master cannot cope anymore)

17. Jenkins pipeline (central + local)
/Jenkinsfile
/local/Jenkinsfile
/central/Jenkinsfile

18. Just-in-time UAT
Image from http://www.sixsigmatrainingfree.com/just-in-time-jit-manufacturing.html
/feature1
/feature2
/feature3

19. Pipeline + plugins = same branch !
Branch /feature-N
Jenkinsfile
Central Local
Jenkins
Dockerfile
Source code