Ruby CI with Jenkins
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• cowboyd@github • cowboyd@twitter Ruby CI with Jenkins 1 Monday, March 5, 2012
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In this short talk, Ishow some great ways you can use Jenkins to supercharge both the development AND deployment of your Ruby projects. Finally, I will demonstrate how you can extend the Jenkins CI server (which is written in Java) with nothing Ruby code.If you aren't getting the most out of your CI tools, or you aren't using a CI tool at all, then this is for you! Implementing a proper CI is a game changer to the way you and your team develop software.
Transcript of Ruby CI with Jenkins
• cowboyd@github
• cowboyd@twitter
Ruby CI with Jenkins
1Monday, March 5, 2012
Your Development Process Needs CI
2Monday, March 5, 2012
Not for code quality*
* this is still very important3Monday, March 5, 2012
For deployment
4Monday, March 5, 2012
You Need CI.CI is crucial to
application distribution
5Monday, March 5, 2012
Ruby deploys suck
6Monday, March 5, 2012
Typical Deploy
• check out from source control
• bundle gems
• generate assets (rails/sprockets)
• and then more stuff...
7Monday, March 5, 2012
Deploying from SCM sucks
8Monday, March 5, 2012
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
9Monday, March 5, 2012
Bundling gems at deploy-time sucks
10Monday, March 5, 2012
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?
11Monday, March 5, 2012
Asset generation on deploy sucks
12Monday, March 5, 2012
Asset generation on deploy sucks
• time consuming
• not tested anywhere else until go-time
13Monday, March 5, 2012
If you’re going to deploy, then deploy.
14Monday, March 5, 2012
This is what we do
1. unpack application archive
2. restart server processes
15Monday, March 5, 2012
This is how we do it
16Monday, March 5, 2012
CI should verify a fully assembled application,
not just its source code
17Monday, March 5, 2012
Deploy a verified, fully assembled application.
18Monday, March 5, 2012
Deploy the output of your CI
19Monday, March 5, 2012
What we assemble
• Source Code
• Gem Bundle
• Static Assets (rails 3.1/Sprockets)
• Passenger
• Ruby
20Monday, March 5, 2012
Deployable
Discard
Pass
Fail
21Monday, March 5, 2012
Winning
• No (or very few) network dependencies
• No (or very few) host dependencies
• Fast!
• Idempotent deploys
22Monday, March 5, 2012
Ruby deploys suck because they grew up
with out CI
23Monday, March 5, 2012
Why Jenkins?
24Monday, March 5, 2012
Zero-Config Installapt-get install jenkinsyum install jenkinschef, puppet and friends
25Monday, March 5, 2012
Open Source
26Monday, March 5, 2012
Extensible400+ plugins to date
27Monday, March 5, 2012
Ruby Tools!Command Line
Plugin SDK
28Monday, March 5, 2012
Ruby CLI
29Monday, March 5, 2012
Ruby PluginsLive Coding!!!
30Monday, March 5, 2012
• cowboyd@github
• cowboyd@twitter
Ruby CI with Jenkins
31Monday, March 5, 2012
