apidays Paris 2022 - Agile API delivery with Feature Toggles, Rafik Ferroukh, Allianz Technology

apidays Paris 2022 - APIs the next 10 years: Software, Society, Sovereignty, Sustainability
December 14, 15 & 16, 2022

Agile API delivery with Feature Toggles
Rafik Ferroukh, Software Architect at Allianz Technology
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Transcript

1. © Allianz 2021 Agile API delivery with Features Toggles Rafik FERROUKH rafik.ferroukh@allianz.fr API DAYS Paris, December 2022
2. Whoami • • • • • • ferrouk@allianz.fr
3. 2023 SERIES OF EVENT New York May 16&17 Australia October 11&12 Singapore April 12&13 Helsinki & North June 5&6 Paris SEPTEMBER London November 15&16 June 28-30 SILICON VALLEY March 14&15 Dubai & Middle East February 22&23
4. 3 We develop the product current version One important feature is not completed…! Dear customer… Sent…
5. 4 New version delivered on production ! A few hours later… Blocker bug detected on Feature
6. Product journey features CONTEXT 5 PRICING QUOTE CONTRACT GUARANTEES CLAUSES DUPLICATION NOT YET IN PRODUCTION ALREADY IN PRODUCTION
7. Product features focus CONTEXT 6 PRICING QUOTE CONTRACT GUARANTEES CLAUSES DUPLICATION NOT YET IN PRODUCTION ALREADY IN PRODUCTION UNFINISHED GENERATE BLOCKER BUG
8. Alert! How should i handle? CONTEXT 7 Not yet finished but must be delivered with the same delivery package if(NotProd()) { // "Clauses" feature code } Clauses
9. Alert! How should i handle? #2 CONTEXT 8 Delivered but generates blocker bug in production! CODE BUILD TEST RELEASE DEPLOY if(NotProd()) { // « Duplication » code } Duplication
10. Feature Branches? FEATURE BRANCHES 9 A Feature Branch is a branch that contains one feature code https://nvie.com/posts/a-successful-git-branching-model/
11. Limits FEATURE BRANCHES 10 MERGE CONFLICTS Feature branches without Toggles https://launchdarkly.com/blog/feature-branching-using-feature-flags/ Feature A Clauses Feature B Duplication
12. 11 My coworker's reaction when their pull-request finally gets merged after a particularly long, intense code review My first attempt to merge a long-lived branch with master branch https://devhumor.com/
13. Limits FEATURE BRANCHES 12 ONLY 1 TEST ENVIRONMENT MERGE CONFLICTS RISK OF DELAY NO UNFINISHED FEATURE TO DEPLOY Feature branches without Toggles https://launchdarkly.com/blog/feature-branching-using-feature-flags/ Feature A Clauses Feature B Duplication
14. Big cons CONTEXT 13 HARDED CODE REBUILD REDEPLOY MULTIPLICITY TIME/COST
15. How can resolve? CONTEXT 14 Continuous delivery? Costs? Changes management? Time? Customer First Quality?
16. Feature Toggle? FEATURE TOGGLES 15 Feature Toggle is a way to enable or disable a feature on the fly without coding, rebuild and redeploy Feature Toggles (often also refered to as Feature Flags) are a powerful technique, allowing teams to modify system behavior without changing code. Martin Fowler https://willmendesneto.com/posts/automating-launchdarkly-feature-flags-cleanup-in-your-codebase/
17. How? FEATURE TOGGLES 16 SAME TEST ENVIRONMENT NO MERGE CONFLICTS MINIMIZE RISK OF DELAY UNFINISHED FEATURE CAN BE DEPLOYED Feature branches with Toggles https://launchdarkly.com/blog/feature-branching-using-feature-flags/ Feature A Clauses Feature B Duplication
18. Categories FEATURE TOGGLES 17 https://www.martinfowler.com/articles/feature-toggles.html https://www.flagship.io/feature-toggle-best-practices/ https://devblogs.microsoft.com/devops/effective-patterns-for- feature-flags/ Release Toggles allow incomplete and un-tested codepaths to be shipped to production as latent code which may never be turned on. Experiment Toggles are used to perform multivariate or A/B testing We might introduce an Ops Toggle when rolling out a new feature which has unclear performance implications so that system operators can disable or degrade that feature quickly in production if needed Permissioning Toggles are used to change the features or product experience that certain users receive Pete Hodgson
19. Framework solutions FEATURE TOGGLES 18 Flaggr Togglz Spring Flags FF4J angular-feature-flags rollout.io
20. On my Product – Software architecture SOLUTIONS - FEATURE TOGGLES 19 Feature Toggles API Business API Frontend App System Team
21. Take Away TAKE AWAY 20 FASTER DEVELOPMENT CONTINUOUS DELIVERY TIMEBOX RESPECT HIGHER AVAILABILITY COMPLEX TEST STRATEGY WHAT TO TOGGLE ? REFACTO ENABLERS TO PLAN INTRUSIVE CODE
22. 21 1. Footnote lorem ipsum dolor sit amet, Consectetuer adipescing elit, sed diam Nonummy
23. Next steps at Allianz NEXT STEPS 22 MIGRATION SSO ADMIN UI SHARING CANARY RELEASE
24. Thank you ! 23
25. On my Product ➔ Togglz? FEATURE TOGGLES 24 Feature Toggles solution implementation for Java Admin UI Additional options (Canary Release, IP, etc…) Integrable via SpringBoot https://www.togglz.org/
26. Go further EXTRA 25 Tests A/B Canary Release Feature performance https://modern-ti.com/2021/10/17/devops-feature-flags-canary-release-blue-green- deployment-etc-quelle-technique-adopter-pour-repondre-aux-defis-du-deploiement-continu/
27. Again further EXTRA 26 Custom product management https://codeahoy.com/2021/02/27/feature-flags/
28. Again further EXTRA 27 Management of premium features https://devblogs.microsoft.com/devops/effective-patterns-for-feature-flags/