Continuous Deployment Demystified

Continuous Deployment Embrace Continuous Improvement Naresh Jain @nashjain naresh@agilefaqs.com http://blogs.agilefaqs.com Licensed Under Creative Commons by Naresh Jain 1

Licensed Under Creative Commons by Naresh Jain 2

Continuous Deployment Licensed Under Creative Commons by Naresh Jain 3

But....Licensed Under Creative Commons by Naresh Jain 4

re nt! diffe re us? ? Too e a or W F h ere mu em ch probl Ch re a aos he Wh o? W ? Is t hen ? ROI?Pro duc tivit y? Licensed Under Creative Commons by Naresh Jain 4

MeLicensed Under Creative Commons by Naresh Jain 5

MumbaiLicensed Under Creative Commons by Naresh Jain 7

AgilePhilly Tech Talks!Licensed Under Creative Commons by Naresh Jain 8

FitNesse Panopticode ProTestDBFit FitDecorator ProFIT La"u Patang QWick Licensed Under Creative Commons by Naresh Jain 9

Back in the Stone-age Licensed Under Creative Commons by Naresh Jain 16

Happiness/Excitement Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

PlanHappiness/Excitement Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

Plan DesignHappiness/Excitement Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

Plan DesignHappiness/Excitement Distribute Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

Plan DesignHappiness/Excitement Distribute Work in Isolation Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

Plan DesignHappiness/Excitement Distribute Work in Isolation Integrate Time/Money/Opportunity Cost Licensed Under Creative Commons by Naresh Jain 17

Last Minute Integration Surprises Licensed Under Creative Commons by Naresh Jain 18

BAD things were visible too Late... Licensed Under Creative Commons by Naresh Jain 19

Birth of CILicensed Under Creative Commons by Naresh Jain 20

CI Helped Us Learn That... Life can Suck a lot Less! Licensed Under Creative Commons by Naresh Jain 22

CI Helped Us Learn That... Life can Suck a lot Less!Collaboration Feedback Quality Delivery Time Wastage Licensed Under Creative Commons by Naresh Jain 22

If people are afraid to check-in frequently... your CI process is NOT working. Licensed Under Creative Commons by Naresh Jain 23

We already do CI. What’s next? Licensed Under Creative Commons by Naresh Jain 24

Multi-Stage CI Process Scaling CI using Build Promotion Licensed Under Creative Commons by Naresh Jain 25

While theLean-Start-up Community They tried something quite disruptive... Licensed Under Creative Commons by Naresh Jain 27

Continuous Deployment (CD) Licensed Under Creative Commons by Naresh Jain 28

CD is quite natural for companies delivering content via Web Licensed Under Creative Commons by Naresh Jain 29

Freeset - In Business for Freedom Licensed Under Creative Commons by Naresh Jain 30

Stage 1 Static Files DB freesetglobal.com s Vie teda wUp Freeset - In Business for Freedom Licensed Under Creative Commons by Naresh Jain 30

Stage 1 Stage 2 Static Static Static Files Files Files DB DB DB Structural Changes Sync freesetglobal.com dev.freesetglobal.com freesetglobal.com s Updates Vie te Viewda wUp ck li -C oy le pl ng De Si Freeset - In Business for Freedom Licensed Under Creative Commons by Naresh Jain 30

Freeset Demo Licensed Under Creative Commons by Naresh Jain 31

Beneﬁts of CD Licensed Under Creative Commons by Naresh Jain 32

Automation removes Errors Licensed Under Creative Commons by Naresh Jain 33

Eliminates stressful release crunch Licensed Under Creative Commons by Naresh Jain 34

Users continuously see improvements Licensed Under Creative Commons by Naresh Jain 35

Reducing batch sizehelps drive out waste Licensed Under Creative Commons by Naresh Jain 36

Faster responses to customer issues Licensed Under Creative Commons by Naresh Jain 37

A/B testing is easierdue to less release overhead Licensed Under Creative Commons by Naresh Jain 38

Encouragesexperimenting with new ideas Licensed Under Creative Commons by Naresh Jain 39

Allows for ﬁne-grainedmonitoring of changes Licensed Under Creative Commons by Naresh Jain 40

Provides satisfactionfrom seeing constant progress Licensed Under Creative Commons by Naresh Jain 41

Can we embrace CD for eLearning?Rich Multi-Media Content Video, Screencasts, Quizzes, Images, Personas, etc.Programming Exercises Java, C#, C++, C & Python Mac OS, Windows, Linux, SolarisDifferent IDE PluginsServer side code analysis (Java, C#, C++, C & Python) Licensed Under Creative Commons by Naresh Jain 42

This is what we did... Licensed Under Creative Commons by Naresh Jain 43

Deploy build to inactive production servers Licensed Under Creative Commons by Naresh Jain 44

Inactive joins the cluster Licensed Under Creative Commons by Naresh Jain 45

Delivery tests verify inactive release Licensed Under Creative Commons by Naresh Jain 46

Reverse proxy swaps inactive with active Licensed Under Creative Commons by Naresh Jain 47

CD Requires Zero Downtime Licensed Under Creative Commons by Naresh Jain 49

Zero Downtime RequiresPerforming updates without interrupting users is essential for Zero Downtime deployments.• The application code• Database schema• Data ﬁles• Web Server• Application Server or Servlet Container• Database Server• OS upgrades and patches Licensed Under Creative Commons by Naresh Jain 50

What about DB Upgrades?Will Continuous Deployment work? Licensed Under Creative Commons by Naresh Jain 51

Hibernate• hbm2ddl.auto = update• Rarely we need to go in and update DB manually Licensed Under Creative Commons by Naresh Jain 52

Zero-downtime DB Updates 012_rename_login_id_to_user_name012_add_user_name_column 02_remove_login_id_column expansion contraction Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 53

Zero-downtime DB Updates Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 54

Zero-downtime DB Updates • expansion Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 54

Zero-downtime DB Updates • expansion • preserves backwards compatibility Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 54

Zero-downtime DB Updates • expansion • preserves backwards compatibility • contract Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 54

Zero-downtime DB Updates • expansion • preserves backwards compatibility • contract • clean up Src: Owen Rogers http://exortech.com/blog/ Licensed Under Creative Commons by Naresh Jain 54

Industrial Logic’seLearning CD Demo Licensed Under Creative Commons by Naresh Jain 55

Eventually...Licensed Under Creative Commons by Naresh Jain 56

CD’s Impact on Team Culture Licensed Under Creative Commons by Naresh Jain 57

Encourage Evolutionary Design and Continuous Improvement culture Licensed Under Creative Commons by Naresh Jain 58

Breaks work into micro-pieces,thereby enabling micro-deliveries Licensed Under Creative Commons by Naresh Jain 59

Limited Work In Progress Licensed Under Creative Commons by Naresh Jain 60

Knows when to hide orreveal work in progress Licensed Under Creative Commons by Naresh Jain 61

Team takes shared ownership of theentire software development lifecycle Licensed Under Creative Commons by Naresh Jain 62

The product is in a always-working-stateNo developer is blocked because they cant get stable code Licensed Under Creative Commons by Naresh Jain 63

Stop the Line CultureTeam catches issues at the source and avoid last minute integration and deployment nightmares Licensed Under Creative Commons by Naresh Jain 64

Team crave for rapid feedback Licensed Under Creative Commons by Naresh Jain 65

Complete TraceabilityVersion Control, Project & RequirementsManagements tool, Bug Tracking and Build system are completely integrated Licensed Under Creative Commons by Naresh Jain 66

Questions? Naresh Jain @nashjain naresh@agilefaqs.com http://blogs.agilefaqs.com Licensed Under Creative Commons by Naresh Jain 67

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Continuous Deployment Demystified

by Naresh Jain

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