ABCDs of Database Development
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The document discusses the importance of integrating databases into continuous delivery processes to ensure fast and reliable deployments. It highlights common challenges such as technology lag, DBA concerns, and the need for proper version control. The session showcases tools for automating database delivery and emphasizes a fully automated process for database changes to minimize risks and protect data.
ABCDs of Database Development
- 1. ABCDs of Database Development (Always Be Continuously Delivering) Elizabeth Ayer, Redgate Continuous Lifecycle London May the 4th @ElizAyer #ConLifecycleLon
- 2. 1.What it is 2.Why you want it 3.Why you can’t have it @ElizAyer #ConLifecycleLon Continuous Delivery in 3 minutes
- 3. Continuous Delivery is a set of software development practices which ensure that software remains releasable at all times. It is based on continuous integration, and automated build, test and deployment. @ElizAyer #ConLifecycleLon
- 4. Don’t stockpile pain. @ElizAyer #ConLifecycleLon
- 6. Version Control Build Release Management Validation Production Dev, Test, Review @ElizAyer #ConLifecycleLon
- 7. Source: 2015 State of DevOps Report, Puppet Labs https://puppet.com/resources/white-paper/2015-state-of-devops-report @ElizAyer #ConLifecycleLon Why the business wants DevOps
- 8. @ElizAyer #ConLifecycleLon Why you want CD
- 9. Databases as a bottleneck 3 reasons why databases have traditionally slowed down deployments: Technology lag SQL CI systems DBA paranoia Frankly… 1 2 3 @ElizAyer #ConLifecycleLon Data persistence Data outlives applications Data can’t be replaced
- 10. Version control becomes the source of truth ~~~~ Development uses production-like environments ~~~~ Changes are reviewed at design time ~~~~ Nobody changes the database by hand Database CD: the rules @ElizAyer #ConLifecycleLon
- 11. Application vs Database CD Application Database What you check in: Code Migrations (or database state) What ‘build’ means: Compile, link, etc. Validate by running migrations What you test in CI: Unit test Upgrade data checks (and unit test db logic) When you deploy: Replace application Run migrations More like infrastructure code than application code…. @ElizAyer #ConLifecycleLon
- 13. Scenario @ElizAyer #ConLifecycleLon Continuous Integration TicketDeskDev1 TicketDeskMyTest TicketDeskCI Version Control 1. Design change: table split 2. Validate change locally: table split 3. Validate change on CI database
- 14. Scenario @ElizAyer #ConLifecycleLon Jenkins TicketDeskDev1 TicketDeskMyTest TicketDeskCI Git 1. Design change: table split 2. Validate change locally: table split 3. Validate change on CI database Flyway
- 15. Alternative approaches 1. Application controls database 2. Desired state @ElizAyer #ConLifecycleLon
- 16. FAQs Hotfixes? Spinning up environments from scratch? Zero-downtime? …Wait, isn’t this scary? @ElizAyer #ConLifecycleLon
- 19. Original Abstract • Databases often sit outside Continuous Delivery for a variety of reasons, good and bad. But if you want fast and reliable deployments, the database cannot remain separate. We’ll talk through the challenges and look at tools to automate database delivery, highlighting open source options. I’ll live demo a database change flowing to ‘production,’ giving a clear picture of a fully automated process. The session is for developers, ops people, and managers, who will come out understanding how to customise practices and toolsets, building a pipeline suited to their environment. The result will accelerate database delivery, while protecting the organisation’s most valuable asset: its data.
- 20. Image Credits Slide 5: Kudzu picture via www.freerepublic.com/focus/news/2658403/posts Slides 6, 13, 14: Icons made by Dave Gandy and Freepik from www.flaticon.com, CC BY 3.0 license Slide 7: Data table from 2015 State of DevOps Report, Puppet Labs https://puppet.com/resources/white-paper/2015-state-of-devops-report Slide 8: Screenshot of https://www.gov.uk/service-manual/agile/continuous- delivery.html Slide 17: Plutonium handling picture from http://www.dsnews.ua/future/pyat- innovatsiy-proshloy-nedeli-kotorye-vy-mogli-propustit-27122015201700 Simpsons picture from http://showbizgeek.com/the-simpsons-final-episode- the-perfect-ending/