Self-contained systems: an introduction

Systems we build for the web fall across a wide spectrum of shapes and sizes. They range from monoliths spanning entire businesses to networks of tiny services connected at a varying degree of coupling. In this talk we will discuss the Self-Contained Systems architecture, or SCS for short. It's an approach to designing distributed systems guided by a handful of clear principles. By following them we can build systems which are loosely coupled, separated along boundaries of our domain, and resilient to partial failure. After discussing principles defining SCS we will compare them to microservices and review important differences. Finally, we will look at concrete examples of the SCS approach deployed out in the real world.

As seen at Warsaw Cloud Native #9.

Transcript

1. Self Contained Systems with Jan Stępień
 @janstepien
2. @innoQ @cljmuc
3. Func%onal
 programming Genera%ve tes%ng So5ware architecture
4. Func%onal
 programming Genera%ve tes%ng So5ware architecture
 of distributed
 web applica%ons
5. μservices in all shapes and sizes 1. Ne0lix 2. Fred George 3. Serverless 4. Bounded contexts
6. a μservice is a fairly broad term 1. μservices must
 be independently
 deployable
7. If you reach this state,
 there is no denying
 that you have actually built
 a distributed monolith. — Daniel Westheide
 The perils of shared code
8. Self-Contained Systems
9. An autonomous
 web applica9on
10. Encompasses UI,
 logic, and data
11. Owned by
 a single team
12. Minimised shared infrastructure
13. Systems share no business code
14. Aside from a web UI,

15. Aside from a web UI,
 an op9onal API
16. Loose integra9on
 and no shared UI
17. Asynchronous communica9on
18. Why should we care? — I’m asking
19. Higher reliability
 and lower latency
20. Loose UI
 integra9on
21. Integra9on through links
23. Integra9on through transclusion
25. Domain-driven separa9on
26. Local decisions
27. Independence and replaceability
28. Gradual
 migra9on
29. An e-commerce example Search Products Cart Payment Home
34. Self Contained Systems @janstepien janstepien.com