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Introduction to Continuous Delivery
Wednesday, August 31th
, 2011

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What is Continuous Delivery?
• Making sure your software is always
production ready throughout its entire
lifecycle
• Any build could potentially be released to
users at the touch of a button using a fully
automated process in a matter of seconds or
minutes.
• Release schedule in the hands of the
business, not in the hands of IT

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Origins of Continuous Delivery
• Agile Manifesto - Our highest priority is to satisfy
the customer through early and continuous
delivery of valuable software

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Origins of Continuous Delivery
• Agile Manifesto - Our highest priority is to satisfy
the customer through early and continuous
delivery of valuable software

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Cont. Delivery vs. Cont. Integration
• “The Last Mile”

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Measuring Continuous Delivery
• Cycle Time
– From Mary and Tom Poppendieck,
“Implementing Lean Software Development”
– The time from deciding that you need to make
a change to having it in production
– A vital metric for any project
• Software release should be a fast,
repeatable process.

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Benefits of Cont. Delivery - Business
• Quickly validates business plan
– Also quickly adapt to real feedback
• Massively lowers the risk of delivery
– Costs are more predictable

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Benefits of Cont. Delivery – Technology
• Real progress feedback
– Done = Live!
• Reduce delivery risk
– Small increments

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Companies Using Cont. Delivery
• Flickr
– http://code.flickr.com

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Companies Using Cont. Delivery
• Stack Overflow
– http://stackoverflow.com/

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Companies Using Cont. Delivery
• Facebook
– http://developers.facebook.com/live_status
– https://www.facebook.com/video/video.php?
v=10100259101684977&oid=9445547199&comments

12. For More Information
Continuous Delivery:
Reliable Software
Releases through
Build, Test, and
Deployment
Automation
– By: Jez Humble; David
Farley
75 min presentation
– By Axel Fountaine
– http://www.parleys.com/#st
=5&id=2443
•Deployinator
– http://codeascraft.etsy.
com/2010/05/20/quant
um-of-deployment/
•Priciples/Practices
– http://java.dzone.com/
articles/8-principles-
continuous
PRIVILEGED & CONFIDENTIAL

13. 8 Principles of Continuous Delivery
• Repeatable & reliable
process for releasing
& deploying
• Automate everything
• If something is difficult
or painful, do it more
often
• Keep everything in
source control
• Done means released
• Build quality in
• Everybody has
responsibility for the
release process
• Improve continuously
PRIVILEGED & CONFIDENTIAL

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4 Practices of Continuous Delivery
• Build binaries only once
• Use precisely the same mechanism to
deploy to very environment
• Smoke test your deployment
• If anything fails, stop the line!