5 Steps on the Way to Continuous Delivery
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Slides from Andrew Phillips' talk on 23 April 2013 at JAX 2013, Mainz, Germany: http://jax.de/2013/sessions?tid=2983#session-25099
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5 Steps on the Way to Continuous Delivery
- 1. Andrew Phillips | XebiaLabs 5 Steps on the Way to Continuous Delivery
- 2. A Bit About Me • VP Products for XebiaLabs • Lots of enterprise software development on high- performance systems • Been on both sides of the “Dev…Ops” fence • Active open source contributor and committer: jclouds, Akka, Gradle and others • Cloud, PaaS & JVM language fan (mainly Scala, Clojure) • Regular meetup, conference etc. presenter
- 3. Agenda • Everybody’s Going CD • Lightning CD Recap • Enterprise Challenges • 5 Steps on the Way to CD • A CD Maturity Model • Q&A
- 4. “Continuous delivery is a set of patterns and best practices that can help software teams dramatically improve the pace and quality of their software delivery.”
- 6. Everybody’s Going CD • Why?
- 7. Everybody’s Going CD • Why? • It’s fun
- 8. Everybody’s Going CD • Why? • It’s fun • It’s cool
- 9. Everybody’s Going CD • Why? • It’s fun • It’s cool • All the cool kids do it
- 10. Everybody’s Going CD • Why? • It’s fun • It’s cool • All the cool kids do it • It accelerates time to market
- 11. Everybody’s Going CD • Why? • It’s fun • It’s cool • All the cool kids do it • It accelerates time to market • All of the above
- 12. Everybody’s Going CD • Why? • It’s fun • It’s cool • All the cool kids do it • It accelerates time to market • All of the above
- 13. Everybody’s Going CD • Why? • It’s fun • It’s cool • All the cool kids do it • It accelerates time to market • All of the above
- 14. Lightning Recap “Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.”
- 15. Lightning Recap “Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.”
- 16. Lightning Recap “Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.” Principle #1 from the Agile Manifesto
- 17. Lightning Recap Value of code in repo vs. Value of code in use by customer
- 18. Lightning Recap Value of code in repo vs. Value of code in use by customer
- 19. Lightning Recap Value of code in repo vs. Value of code in use by customer
- 20. Lightning Recap Value of code in repo vs. Value of code in use by customer
- 21. Lightning Recap Value of code in repo vs. Value of code in use by customer
- 23. Enterprise Challenges • Large, monolithic applications • Low levels of automation • Contended environments • Release Management requirements • …
- 24. 5 Steps on the Way
- 25. 5 Steps on the Way
- 26. 5 Steps on the Way + =
- 27. 1. Complete Delivery Artifact • We move one uniquely identified deliverable through the pipeline • Needs to contain all the items considered part of the delivered version – Application binaries – Database changes – Configuration files – Server settings – Dependencies – …
- 28. 1. Complete Delivery Artifact • This might sound self-evident, but… • …it’s harder to do than it appears – Environment-specific builds? – Configuration settings requested via change tickets? – Smoke tests present only in the testers’ notes/heads?
- 29. 2. Pipeline Stage Checklist • Break down your pipeline into tasks • For each task, define – Owner – Input – Output – Triggers – Prerequisites/gates – Success/failure criteria – Failure handling
- 30. 2. Pipeline Stage Checklist • Checklists determine sequence and parallelization of stages • Knowledge/confidence level/quality measurements are also output! • Think about feedback cycles (“if this task fails, how can I learn from that?”)
- 31. 3. Manageable Units of Work • In general, smaller tasks = faster runtime • Basic upper limit: throughput ≤ 1 / (duration of longest task) • Are your long-running tasks providing “value for runtime”?
- 32. 4. Scalable Capacity • To run pipeline jobs (= “workers”) • To run applications (= “environments”)
- 33. 4. Scalable Capacity • To run pipeline jobs (= “workers”) • To run applications (= “environments”) • Would like on-demand capacity quickly • Investigate cloud-based services
- 34. 5. Automation, Automation, Automation • Automation isn’t a prerequisite for CD… • …but it’s pretty much essential • Can you reliably execute your manual task at the required frequency with the desired level of throughput?
- 35. 5. Automation, Automation, Automation • Automation isn’t a prerequisite for CD… • …but it’s pretty much essential • Can you reliably execute your manual task at the required frequency with the desired level of throughput?
- 36. 5. Automation, Automation, Automation • Think about – Build automation – Unit Test automation – Deployment automation – Integration/Performance/UA Test automation – Automated metrics gathering – Automated feedback cycles
- 37. 6. “Side Effect” Overview • Pipeline tasks and stages don’t just run and produce log output… • …they also have “side effects” – Creating and destroying on-demand environments – Updating of versions of applications deployed to (testing, mainly) envionments – Updating the “confidence measure” of the application version being tested – …
- 38. 6. “Side Effect” Overview • Don’t want to have to “re-engineer” the state of your IT landscape based on the progress of pipeline jobs • More commonly-used domain model helps present business-relevant information
- 39. 7. Release Control • Later pipeline stages affect tightly- controlled environments • Release Management requirements must be met • Can link this to prerequisites/gates for tasks
- 40. 7. Release Control • How to automate gates to avoid a manual bottleneck? • How to ensure (automated) quality/security etc. measurements fulfill release requirements • “Fine-tuning the dial between throughput and control”
- 41. 8. Improvement Metrics • You (or your boss) don’t just want to feel things are getting better… • …you need to know they are!
- 42. 8. Improvement Metrics • Sample metrics: – Throughput? – Failure rate? – Standardization coefficient – Mean & stddev of duration per task/stage? – Max/min duration per task/stage? – # of manual tasks?
- 43. Summary
- 44. Summary 1. Complete Delivery Artifact
- 45. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist
- 46. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work
- 47. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work 4. Scalable Capacity
- 48. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work 4. Scalable Capacity 5. Automation, Automation, Automation
- 49. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work 4. Scalable Capacity 5. Automation, Automation, Automation 6. “Side Effect” Overview
- 50. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work 4. Scalable Capacity 5. Automation, Automation, Automation 6. “Side Effect” Overview 7. Release Control
- 51. Summary 1. Complete Delivery Artifact 2. Pipeline Stage Checklist 3. Manageable Units of Work 4. Scalable Capacity 5. Automation, Automation, Automation 6. “Side Effect” Overview 7. Release Control 8. Improvement Metrics
- 52. Maturity Model • Metrics give indication of progress • Define a maturity model based on your business goals • Will often spans more than “classic” automation: from requirements gathering to runtime application and quality analysis • Feedback cycles essential to targeted improvements
- 53. More Info • Application Release Trends 2013 Survey – go.xebialabs.com/Survey2013.htm • Dzone Refcard: “Preparing for Continous Delivery” – refcardz.dzone.com/refcardz/preparing-continuous-delivery • “Introducing Continuous Delivery in the Enterprise” – go.xebialabs.com/EBCDWhitepaper_Continuous_Delivery.html • Continuous Delivery Automation – www.xebialabs.com/continuous-delivery • Drop by our booth #11!
- 54. Thank You! Deployit: www.xebialabs.com/products Blog: blog.xebialabs.com Twitter: @xebialabs YouTube: youtube.com/xebialabs