Continuous Delivery (CD) is a software development practice that allows for frequent and reliable release of software by integrating changes continuously, verified through automated testing. It emphasizes the need for a collaborative culture in both development and operations (DevOps) to improve software quality and deployment speed. The document discusses principles of CD, including the importance of automation, version control, and a supportive organizational culture.

1. bertjan@openvalue.nl
Continuous Delivery
Better software, faster.
Bert Jan Schrijver
@bjschrijver

2. Software delivery in the old days…

3. Bert Jan Schrijver
L e t ’ s m e e t
@bjschrijver

4. Principles of CD
Ingredients of CD
The goal of
Continuous Delivery
Definitions
Why CD?
Where do I start?
Conclusion
Outline
W h a t ‘ s n e x t ?
CD vs DevOps
@bjschrijver

5. Definitions
Every change goes through the
build/test pipeline and
automatically gets put into
production.
Continuous Deployment
?!
DevOpsBuilding and testing software in
such a way that the software can be
released to production at any time.
"Ship early, ship often, sacrificing
features, never quality" - Kyle Neath
Continuous Delivery
Team members integrate their
work frequently. Commits are
verified by automated builds and
tests.
Continuous Integration
Who’s who in CI & CD
@bjschrijver

6. Source: https://i.ytimg.com/vi/64BOxYpVZpU/maxresdefault.jpg
YOU KEEP USING THAT WORD
I DO NOT THINK IT MEANS WHAT YOU THINK IT MEANS

7. Definitions
Every change goes through the
build/test pipeline and
automatically gets put into
production.
Continuous Deployment
Development and operations
engineers being responsible
together for the entire product
lifecycle.
DevOpsBuilding and testing software in
such a way that the software can be
released to production at any time.
"Ship early, ship often, sacrificing
features, never quality" - Kyle Neath
Continuous Delivery
Team members integrate their
work frequently. Commits are
verified by automated builds and
tests.
Continuous Integration
Who’s who in CI & CD
@bjschrijver

8. How it all started…

10. What is the goal of CD?

11. a repeatable, reliable process
for releasing software
What is the goal of CD?

12. Principles
of Continuous Delivery
@bjschrijver
Build quality in
Keep everything in version control
Continuous improvement
Automate (almost) everything
Everybody is responsible
for the delivery process
Done means released
If it hurts, do it more often

13. Ingredients of Continuous Delivery

14. Ingredients
03Build & deploy
Information & reporting
05
Design & architecture
02
Culture & organisation
01
Test & verification
04
of Continuous Delivery
@bjschrijver

15. • Agile software development
• Building the right thing
• Building the thing right
• You build it, you run it
• Cross functional teams
• Room to experiment, room for failure
Culture & organisation
Source: http://kids.nationalgeographic.com/explore/countries/netherlands/#netherlands-tulip-fields.jpg

16. • Version control
• Modularity
• Branching strategy
• Database changes
• Design for failure
• Feature toggles
• Automated provisioning
Design & architecture

17. • Pipeline:
An automated sequence of stages to deliver software
from version control to your users.
• Build pipeline
• Deployment pipeline
Build & deploy

18. • Testing strategy
• Test automation
• Non functional requirements
• Security
• Performance
• Verify expected business value
Test & verification

19. • Static code analysis
• Traceable pipelines
• Automatic change logs
• Usage metrics
• Dynamic dashboards
• Data driven decisions, act on metrics
• Fix problems before the users notice
Information & reporting
Source: http://www.nasa.gov/images/content/218652main_STOCC_FS_img_lg.jpg

20. WORKED FINE IN DEV
OPS PROBLEM NOW
Continuous Delivery vs. DevOps

21. DevOps: a definition
Development and operations engineers
being responsible together
for the entire lifecycle of a product.

22. :
building and running better-quality software
more quickly and more reliably.
Developers and other IT professionals
working together on a shared goal
DevOps: another definition

23. Why DevOps?
as an enabler for Continuous Delivery, faster problem
resolution and focus on value instead of problems.
DevOps makes your business move faster

24. What is DevOps really about?

25. DevOps is about culture
Source: http://www.azmc.org/wp-content/uploads/2012/11/Arts-and-Culture-Large.jpg

26. DevOps is about freedom and responsibility
Source: https://images.unsplash.com/photo-1449177009399-be6867ef0505

27. DevOps is about empathy
Source: http://www.scarymommy.com/wp-content/uploads/2014/06/empathy.jpg

28. Continuous Delivery sounds great,
but it won’t work here
“
”
Photo: Dave Lehl, text source: Jez Humble

29. “Continuous Delivery won’t work here”
• Stated reasons:
• we’re regulated
• we’re not building
websites
• too much legacy
• our people are too
stupid
• Actual reasons:
• our culture stinks
• our architecture
stinks
Photo: Dave Lehl, text source: Jez Humble
Source: talk by Jez Humble
https://www.youtube.com/watch?v=837Z_oehhRg

30. Why should I do all this?

31. Why CD & DevOps?
• Reducing errors
• Lowering stress
• Empowering teams
• Deployment flexibility
• Practice makes perfect

32. Source: https://7216-presscdn-0-76-pagely.netdna-ssl.com/wp-content/uploads/2011/12/confused-man-single-good-men.jpg
Where do I get started?

33. …said no product manager ever.
J. Paul Reed
Let’s spend the next few months..
..working on automated testing and build/release
infrastructure, and redesigning how our application is
written. We can postpone our feature development.
“
”

34. Take one thing you’re pretty
sure you can improve.
Start small
Tackle the next issue
and keep improving!
Iterate
Approach
How to spark change
When done, share the results
with your team.
Celebrate!
Show results
@bjschrijver

36. What is the goal of a software team?

37. Working, useful software, in production.

38. Source: https://cdn2.vox-cdn.com/thumbor/J9OqPYS7FgI9fjGhnF7AFh8foVY=/148x0:1768x1080/1280x854/cdn0.vox-cdn.com/uploads/chorus_image/image/46147742/cute-success-kid-1920x1080.0.0.jpg
THAT’S IT.
NOW GO KICK SOME ASS!

39. Questions?
@bjschrijver

40. Thanks for your time.
Got feedback? Tweet it!
All pictures belong
to their respective
authors
@bjschrijver