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Ruby CI with Jenkins

C
cowboyd

The document discusses the importance of Continuous Integration (CI) in the Ruby development process, particularly for deployment. It outlines the challenges of typical Ruby deployments, such as dependency on source control and the need for real-time asset generation, emphasizing the need to deploy a fully assembled and verified application. Jenkins is presented as a solution for CI, highlighting its zero-config install, open-source nature, and extensibility through plugins.

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Ruby CI with Jenkins • cowboyd@github • cowboyd@twitter Monday, March 5, 2012 1
Your Development Process Needs CI Monday, March 5, 2012 2
Not for code quality* * this is still very important Monday, March 5, 2012 3
For deployment Monday, March 5, 2012 4
You Need CI. CI is crucial to application distribution Monday, March 5, 2012 5
Ruby deploys suck Monday, March 5, 2012 6
Typical Deploy • check out from source control • bundle gems • generate assets (rails/sprockets) • and then more stuff... Monday, March 5, 2012 7
Deploying from SCM sucks Monday, March 5, 2012 8
Deploying from SCM sucks • If Github is getting DDOS’d should that mean you can’t deploy? • Branches and tags can be moving targets • server affinity for a particular branch Monday, March 5, 2012 9
Bundling gems at deploy-time sucks Monday, March 5, 2012 10
Bundling gems at deploy-time sucks • Why should my deploy depend on rubygems.org? • My app is about to go live. Is now really the best time to be compiling C extensions? Monday, March 5, 2012 11
Asset generation on deploy sucks Monday, March 5, 2012 12
Asset generation on deploy sucks • time consuming • not tested anywhere else until go-time Monday, March 5, 2012 13
If you’re going to deploy, then deploy. Monday, March 5, 2012 14
This is what we do 1. unpack application archive 2. restart server processes Monday, March 5, 2012 15
This is how we do it Monday, March 5, 2012 16
CI should verify a fully assembled application, not just its source code Monday, March 5, 2012 17
Deploy a verified, fully assembled application. Monday, March 5, 2012 18
Deploy the output of your CI Monday, March 5, 2012 19
What we assemble • Source Code • Gem Bundle • Static Assets (rails 3.1/Sprockets) • Passenger • Ruby Monday, March 5, 2012 20
Pass Deployable Fail Discard Monday, March 5, 2012 21
Winning • No (or very few) network dependencies • No (or very few) host dependencies • Fast! • Idempotent deploys Monday, March 5, 2012 22
Ruby deploys suck because they grew up with out CI Monday, March 5, 2012 23
Why Jenkins? Monday, March 5, 2012 24
Zero-Config Install apt-get install jenkins yum install jenkins chef, puppet and friends Monday, March 5, 2012 25
Open Source Monday, March 5, 2012 26
Extensible 400+ plugins to date Monday, March 5, 2012 27
Ruby Tools! Command Line Plugin SDK Monday, March 5, 2012 28
Ruby CLI Monday, March 5, 2012 29
Ruby Plugins Live Coding!!! Monday, March 5, 2012 30
Ruby CI with Jenkins • cowboyd@github • cowboyd@twitter Monday, March 5, 2012 31

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Ruby CI with Jenkins

  • 1. Ruby CI with Jenkins • cowboyd@github • cowboyd@twitter Monday, March 5, 2012 1
  • 2. Your Development Process Needs CI Monday, March 5, 2012 2
  • 3. Not for code quality* * this is still very important Monday, March 5, 2012 3
  • 5. You Need CI. CI is crucial to application distribution Monday, March 5, 2012 5
  • 6. Ruby deploys suck Monday, March 5, 2012 6
  • 7. Typical Deploy • check out from source control • bundle gems • generate assets (rails/sprockets) • and then more stuff... Monday, March 5, 2012 7
  • 8. Deploying from SCM sucks Monday, March 5, 2012 8
  • 9. Deploying from SCM sucks • If Github is getting DDOS’d should that mean you can’t deploy? • Branches and tags can be moving targets • server affinity for a particular branch Monday, March 5, 2012 9
  • 10. Bundling gems at deploy-time sucks Monday, March 5, 2012 10
  • 11. Bundling gems at deploy-time sucks • Why should my deploy depend on rubygems.org? • My app is about to go live. Is now really the best time to be compiling C extensions? Monday, March 5, 2012 11
  • 12. Asset generation on deploy sucks Monday, March 5, 2012 12
  • 13. Asset generation on deploy sucks • time consuming • not tested anywhere else until go-time Monday, March 5, 2012 13
  • 14. If you’re going to deploy, then deploy. Monday, March 5, 2012 14
  • 15. This is what we do 1. unpack application archive 2. restart server processes Monday, March 5, 2012 15
  • 16. This is how we do it Monday, March 5, 2012 16
  • 17. CI should verify a fully assembled application, not just its source code Monday, March 5, 2012 17
  • 18. Deploy a verified, fully assembled application. Monday, March 5, 2012 18
  • 19. Deploy the output of your CI Monday, March 5, 2012 19
  • 20. What we assemble • Source Code • Gem Bundle • Static Assets (rails 3.1/Sprockets) • Passenger • Ruby Monday, March 5, 2012 20
  • 21. Pass Deployable Fail Discard Monday, March 5, 2012 21
  • 22. Winning • No (or very few) network dependencies • No (or very few) host dependencies • Fast! • Idempotent deploys Monday, March 5, 2012 22
  • 23. Ruby deploys suck because they grew up with out CI Monday, March 5, 2012 23
  • 25. Zero-Config Install apt-get install jenkins yum install jenkins chef, puppet and friends Monday, March 5, 2012 25
  • 27. Extensible 400+ plugins to date Monday, March 5, 2012 27
  • 28. Ruby Tools! Command Line Plugin SDK Monday, March 5, 2012 28
  • 30. Ruby Plugins Live Coding!!! Monday, March 5, 2012 30
  • 31. Ruby CI with Jenkins • cowboyd@github • cowboyd@twitter Monday, March 5, 2012 31