Introduction to continuous integration and Jenkins

1. Continuous Integration
Jumpstart CI with Jenkins Workflow
@udaypal
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2. Topics
• Economics of Continuous Integration
• What is Continuous Integration?
• Practicing continuous integration
• Continuous Integration with Jenkins
• Jenkins workflow
• Q & A
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3. About Me
• Director, Solutions Architect
• Open Source Evangelist
• Developer @ heart
• Occasional Committer
• Soccer referee
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4. Who we are
• CloudBees Founded in 2010
• The Jenkins Enterprise Company
• Core Contributors
• Products
• Jenkins Enterprise
• Jenkins Operation Center
• Support, Training, Consulting, JUC etc..
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5. Economics of CI
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6. 6
Economics
Source
:
Applied
So*ware
Measurement,
Capers
Jones,
1996

7. Time
$
Developer
Computer
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Economics

8. What is CI?
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9. What is CI?
Continuous Integration (CI) is a development practice that
requires developers to integrate code into a shared
repository several times a day. Each check-in is then
verified by an automated build, allowing teams to detect
problems early.
By integrating regularly, you can detect errors quickly,
and locate them more easily.
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10. Version
Control
Build &
Unit Tests
Functional
Tests
Acceptance
Tests
ReleaseDevelopment
Checkin
Trigger
Feedback
Checkin
Trigger
Feedback Trigger
Feedback
Checkin
Trigger
Feedback Trigger
Feedback
Feedback
Approved
Approved
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11. Practicing CI
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12. Continuous Integration
Practicing
Continuous
Integration
• Central Repository
• Build every commit
• Automate builds
• Builds are self-testing
• Fail fast, build fast
• Test in production clone
• Automate deployment(s)
• Analyze
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Change'
Build'
Test'Deploy'
Analyze'

13. Continuous Integration
Team
Responsibilities
• Commit Early, commit often
• Never commit broken, untested code
• Broken builds are the highest priority
• Don’t checkin when build is broken
• Make sure last checkin of day doesn’t break build
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14. Jenkins and CI
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15. Jenkins
• 1000
• 597
• 70
• 8
• 1
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- Over 1000 Plugin
- Over 500+ weekly releases
- 70% Market
- 8+ Years
- #1 CI Server

16. Jenkins
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What type of tasks do you use Jenkins for?
Build
Test
Code Analysis
Batch Tasks
Release
Operations
Deployment
Other
0% 25% 50% 75% 100%
5.37%
47.81%
14.95%
48.37%
38.47%
64.07%
86.42%
95.19%

17. Jenkins
Hub
Of
Continuous
Delivery
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Binaries
Code
Analysis
SCM Production
Functional
Tests
Perf / Load
Test

18. Jenkins CI
Old
Workflows
• Copy Artifacts
• Build Triggers
• Build Flow
• Build Pipeline
• Build Delivery Pipeline
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19. Jenkins CI
Complex
Job
Chaining
• Many atomic jobs
• Mix build triggers, parameterized build …
• Limited logic
• Hard to share variables / state between jobs
• Cannot survive restart
• Disjointed views & configuration sprawl
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20. Jenkins Workflow
Features
• One job to capture complex pipeline
• Based on Groovy
• Can survive restarts
• Throttle builds
• Human input
• Visualization
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21. Summary
• CI is cost effective
• CI reduces manual error prone processes
• CI enables better visibility
• CI establishes greater confidence
• CI is a necessary step towards CD
• Jenkins is awesome @ CI
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