Modularization via microservices

Transcript

1. Modularization for Agility Stefan Tilkov, @stilkov
 innoQ Deutschland GmbH
2. Problems Some People Have Building features takes too long Technical debt is well-known and not addressed Deployment is way too complicated and slow Replacement would be way too expensive Scalability has reached its limit Architectural quality has degraded “-ility” problems abound
3. “Monolithic” Applications See https://www.innoq.com/en/links/self-contained-systems-infodeck/
4. Layers
5. Contexts
6. Internal components
7. Multi-dimensional complexity
8. „Organizations which design systems […] are constrained to produce designs which are copies of the communication structures of these organizations.“ — Melvin Conway, 1968
9. Conway’s Law illustrated
10. So let’s start with this …
11. … and cut it apart: Microservices
12. “Flavors” of Microservices > “Microservice” is a very ill-defined term and means different things to different people > Two mainstream interpretations of the term: > Self-contained systems (SCS) > “Proper” microservices (where “micro” means “really small”)
13. Self-contained Systems (SCS) UI Logic DB UI Logic DB UI Logic DB Shop system Shop system Products Checkout Search UI-level integration UI Logic DB Products Checkout Search data replication Business domain broken down into vertical slices
14. “Proper” Microservices UI Shop system Products Checkout Search Logic DB Logic DB Logic DB Logic DB Logic Logic Logic Logic Shop system UI Logic DB Products Checkout Search Checkout Products Search Business domain broken down into UI and services
15. SCS and Microservices Combined UI Shop system Products Checkout Search UI-level integration Logic DB Logic DB UI Logic Logic Logic UI Logic DB Logic Logic DB data replication Logic Logic Service-oriented on both macro and micro level
16. Some equations 1 Service = 1 Deployment Unit
 (“can be deployed independently”) 1 Service = 1 Team
 (“one team is responsible for building it”) 1 Service = 1 Bounded Context
 (“does only one thing, but does it well”)
17. 1 project ≠ 1 system
 (“modularize from the start”)
18. Business processes? > Require inherent support – not just “lipstick on a pig” > process support within a single monolithic app ≠ agility > Microservices as containers for atomic microflows
19. Support for change in multiple dimensions > Business logic within implementations > Non-functional requirements > Implementation technology → independently for each service
20. Conway’s Law revisited –
 Can architecture have an impact on organisation? ? ?
21. Continuous Delivery
22. Delivering monoliths vs. microservices Commit Stage Automated Acceptance Testing Automated Capacity Testing Manual Explorative Testing Release Commit Stage Automated Acceptance Testing Automated Capacity Testing Manual Explorative Testing Release Commit Stage Automated Acceptance Testing Automated Capacity Testing Manual Explorative Testing Release Commit Stage Automated Acceptance Testing Automated Capacity Testing Manual Explorative Testing Release Commit Stage Automated Acceptance Testing Automated Capacity Testing Manual Explorative Testing Release > separate deployment pipelines per team > services can be released and deployed independently > smaller and more frequent releases > the whole system is released and deployed in one go > requires significant coordination within the team(s) > large, infrequent releases
23. 10 Benefits of microservices 1. Isolation 2. Autonomy 3. Indidual Scalability 4. Resilience 5. Cloud affinity 6. Experimentation 7. Rapid Feedback 8. Flexibility 9. Replacability 10. Ecosystem
24. Summary
25. Architecture Organization Agility
26. Stefan Tilkov, @stilkov stefan.tilkov@innoq.com http://www.innoq.com/blog/st/ Phone: +49 170 471 2625 innoQ Deutschland GmbH Krischerstr. 100 40789 Monheim am Rhein Germany Phone: +49 2173 3366-0 innoQ Schweiz GmbH Gewerbestr. 11 CH-6330 Cham Switzerland Phone: +41 41 743 0116 www.innoq.com Ohlauer Straße 43 10999 Berlin Germany Phone: +49 2173 3366-0 Robert-Bosch-Straße 7 64293 Darmstadt Germany Phone: +49 2173 3366-0 Radlkoferstraße 2 D-81373 München Germany Telefon +49 (0) 89 741185-270 Thank you. Questions? Comments?