Lessons Learned — Testimonial of a brand new microservices architecture in production - JavaDay Kiev

At a major telco company in Belgium we have designed and implemented a cutting-edge architecture using microservices and hypermedia (REST level 3 / hateoas) for the entire customer- and business-facing web portfolio. During this talk we will shed a light on the migration path we went through to get Spring Cloud microservices based on Netflix deployed to production. Migrating from a monolith to containerized microservices doesn't always go smoothly in a rigid regulated enterprise. This is not your regular microservice talk. This is a journey through our struggles to reform both technically and culturally (inverse Conway's maneuvre) towards a devops distributed architecture which actually runs on production. E.g. gradually evolving from a manual infrastructure deploying on JBoss and using dedicated apache load balancers, to a PaaS private cloud solution.

Transcript

1. Microservices architecture migration in production
2. WHOAMI • Work for Ordina Belgium • Open source enthusiast • Spring contributor • Speaker • Technical lead & coding architect @ Proximus • Marathon runner
3. The Early Days Monolithic server-side MVCs
4. The Early Days webshop services
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc Datastore Datastore Datastore Datastore
5. Code reuse attempt webshop services
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc shared library
6. Code reuse attempt webshop services
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc shared library
7. Common API monolith webshop services
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc shared library webshop services
 site public
 site corporate
 site api monolith
8. Common API monolith blic
 e corporate
 site ESB Browser webshop services
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 site api monolith api Client api Client api Client api Client JSON over HTTP Shared domain model Shared domain model Shared domain model Shared domain model Shared domain model
9. Common API monolith webshop servicing
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc shared library webshop services
 site public
 site corporate
 site api monolith
10. A New Approach 6-Months Proof Of Concept
11. A New Approach Microservices with hypermedia
12. Proof Of Concept R&D Spring Boot vs DropWizard vs … HAL vs Siren vs … Netflix Eureka vs Zookeeper vs …
13. Proof Of Concept R&D Spring Cloud Netflix Spring Boot Admin Spring REST Docs
14. Inverse Conway’s Manoeuvre Cultural change DevOps culture Open Source attitude
15. Inverse Conway’s Manoeuvre
16. Microservices Migration webshop servicing
 site public
 site corporate
 site ESB Browser SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc SOA svc shared library webshop servicing site public
 site corporate
 site api monolith
17. Microservices Migration c
 corporate
 site ESB Browser webshop webshop servicing
 site public
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 site Gateway μS μS μS μS μS μS μS μS μS μS μS μS μS Registry Config
18. VM JBoss Deployment Migration μS JBoss μS JBoss μS
19. PaaS VM Deployment Migration μS μS μS
20. PaaS Deployment Migration c
 corporate
 site ESB Browser eShop webshop servicing
 site public
 site corporate
 site Gateway μS μS μS μS μS μS μS μS μS μS μS μS μS Registry Config
21. PaaS Monitoring Migration c
 corporate
 site ESB Browser eShop webshop servicing
 site public
 site corporate
 site Gateway μS μS μS μS μS μS μS μS μS μS μS μS μS Registry Config Hystrix Kibana Boot
 Admin Turbine
26. PaaS Monitoring Migration c
 corporate
 site ESB Browser eShop webshop servicing
 site public
 site corporate
 site Gateway μS μS μS μS μS μS μS μS μS μS μS μS μS Registry Config Hystrix Kibana Boot
 Admin Turbine
27. Testing Migration ESB Browser webshop servicing
 site public
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 site Gateway μS μS
28. Testing Migration ESB Browser webshop servicing
 site public
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 site Gateway μS μS
29. Testing Migration Browser webshop servicing
 site public
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 site Gateway μS μS ESB SOA svc SOA svc SOA svc SOA svc SOA svc SOA atastore Datastore Datastore Datastore
30. Versioning Migration • Content-negotiation • Hateoas • Semantic versioning • Tolerant reader with late binding
31. Documentation Migration Contract Documentation HAL Browser Spring REST Docs Resource graph
34. this.mockMvc.perform(get("/").accept(MediaType.APPLICATION_JSON)) .andExpect(status().isOk()) .andDo(document("index", links( linkWithRel("alpha").description("Link to the alpha resource"), linkWithRel("bravo").description("Link to the bravo resource")))); this.mockMvc.perform(get("/user/5").accept(MediaType.APPLICATION_JSON)) .andExpect(status().isOk()) .andDo(document("index", responseFields( fieldWithPath("contact").description("The user's contact details"), fieldWithPath("contact.email").description("The user's email address"))));
37. Documentation Migration Microservices Documentation Spring Boot Admin Eureka Microservices UI
42. https://github.com/DennisJaamann/
 micro-services-gui/tree/dev
43. Microservices Migrations Cultural migration Architectural migration Deployment migration Monitoring migration Testing migration Versioning migration Documentation migration
44. Thank you for your attention @andreasevers https://netflix.github.io/ http://projects.spring.io/spring-cloud/ http://cloud.spring.io/spring-cloud-sleuth/ https://github.com/openzipkin/zipkin https://github.com/codecentric/spring-boot-admin https://github.com/mikekelly/hal-browser https://api-sandbox.foxycart.com/hal-browser/browser.html#/ http://projects.spring.io/spring-hateoas/ https://github.com/spring-projects/spring-restdocs https://github.com/DennisJaamann/micro-services-gui/tree/dev