Spring cloud-netflix-oss-microservices
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The document summarizes a presentation given on microservices architecture using Spring Cloud and Netflix OSS. It defines microservices as structuring an application as loosely coupled services organized by business capabilities. Key benefits include faster deployments, independent scalability, and greater resiliency. Challenges include overall complexity in distributed systems with latency, faults, and operational overhead. The presentation demonstrates how to create microservices using Spring Boot and leverage Netflix OSS libraries for service discovery, load balancing, and resiliency patterns. Best practices emphasized testing services for resiliency under various error conditions.
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Spring cloud-netflix-oss-microservices
- 1. SPRING CLOUD MICROSERVICES WITH NETFLIX OSS BOSTON JAVA MEETUP, CAMBRIDGE, MA NOVEMBER 12, 2019 Miya W Longwe Founder of Ezcloud Technologis Inc, mlongwe@gmail.com
- 2. @mlongwe PRESENTATION GOAL Define the Microservice Architecture Explain what that means and why it matters Review implementation using Spring Cloud and Neflix OSS
- 4. @mlongwe ABOUT MIYA Consultant and developer focusing on modern application architectures including microservices Technology evangelist
- 5. AGENDA A brief refresher on software architecture The journey monolith to microservices Microservices != silver bullet Applying the microservice pattern language @mlongwe
- 6. ABOUT SOFTWARE ARCHITECTURE “The software architecture of a computing system is the set of structures needed to reason about the system, which comprise software elements, relations among them, and properties of both.” Documenting Software Architectures, Bass et al
- 8. @crichardson The monolithic architecture is an architectural style that structures the application as a single executable component Implementation view
- 9. @crichardson Tomcat/App. Server Traditional: Monolithic architecture Browser/ Client WAR/EAR MySQL Database Review Management Catalog Management Recommendation Management StoreFrontUI Order Management HTML REST/JSON Logical view Implementation view
- 10. But successful applications keep growing…. Development Team Application @crichardson
- 11. … and growing Development Team A ApplicationDevelopment Team B Development Team C @longwe
- 12. Technology stack becomes increasingly obsolete BUT Arewrite is not feasible @crichardson
- 13. TIPPING POINT & & Organizational Growth Diverse Functionality Bottleneck in Monolithic stack
- 14. MONOLITHIC APPS – FAILURE & AVAILABILITY
- 16. MONOLITHIC APP (VARIOUS COMPONENTS LINKED TOGETHER) Comparing Monolithic to Micro-Services
- 17. The microservice architecture is an architectural style that structures an application as a set of loosely coupled, services organized around business capabilities
- 18. MICRO-SERVICES – SEPARATE SINGLE PURPOSE SERVICES
- 19. Monolithic Architecture (Revisiting) Load Balancer Monolithic App Account Component Catalog Component Recommendation Component Customer Service Component Database
- 20. Micro-services Architecture Load Balancer Account Service Catalog Service Recommendation Service Customer Service Service Catalog DB API Gateway Customer DB
- 21. Concept -> Service Dependency Graph Your App/Service Service X Service Y Service Z Service L Service M
- 22. CHARACTERISTICS Many smaller (fine grained), clearly scoped services Single Responsibility Principle Domain Driven Development Bounded Context Independently Managed Clear ownership for each service Typically need/adopt the “DevOps” model Attribution: Adrian Cockroft, Martin Fowler …
- 23. WHY? Faster and simpler deployments and rollbacks Independent Speed of Delivery (by different teams) Right framework/tool/language for each domain Recommendation component using Python?, Catalog Service in Java .. Greater Resiliency Fault Isolation Better Availability If architected right
- 25. CHALLENGES Can lead to chaos if not designed right …
- 26. OVERALL COMPLEXITY • Distributed Systems are inherently Complex • Latency, Fault Tolerance, Retry storms .. • Operational Overhead • TIP: Embrace DevOps Model
- 28. SPRING CLOUD
- 29. CREATING MICRO-SERVICES– SPRING BOOT
- 30. SERVICE ARCHITECTURE SPRING BOOT & SPRING CLOUD NETFLIX OSS
- 31. SERVICE DISCOVERY • 100s of Micro-Services • Need a Service Metadata Registry (Discovery Service) Account Service Catalog Service Recommendation Service Customer Service Service X Service Y Service Z Service Registry Service (e.g. Netflix Eureka)
- 32. Central (Proxy) Loadbalancer Account Service Load Balancer Account Service 1 Recommendation Service 1 Customer Service Service 1 API Gateway Account Service N Recommendation Service N Customer Service Service N Customer Service Load Balancer Reco Service Load Balancer
- 36. * Inspired by Benjamin Franklin three
- 37. CHALLENGES - SUMMARY • Service Discovery • Operational Overhead (100s of services; DevOps model absolutely required) • Distributed Systems are inherently Complex • N/W Latency, Fault Tolerance, Serialization overhead .. • Service Interface Versioning, Mismatches? • Testing (Need the entire ecosystem to test) • Fan out of Requests -> Increases n/w traffic
- 39. Best Practices contd.. • Test Services for Resiliency • Latency/Error tests (via Simian Army) • Dependency Service Unavailability • Network Errors
- 40. DEMO
- 41. Takeaways
- 42. Takeaways • Monolithic apps – good for small organizations • MicroServices – have its challenges, but the benefits are many • Consider adopting when your organization scales • Leverage Best Practices • An Elastic Cloud provides the ideal environment (Auto Scaling etc.) • NetflixOSS has many libraries/samples to aid you
- 43. Questions?