점진적인 레거시 웹 애플리케이션 개선 과정
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This document discusses strategies for modernizing a legacy monolithic application, including using strangler patterns to gradually refactor the monolith into microservices. It outlines approaches like using an API gateway to front the legacy system and new services, as well as methodologies like twelve-factor apps. Key techniques mentioned include feature toggles and service discovery with Eureka.
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점진적인 레거시 웹 애플리케이션 개선 과정
- 3. ✔ ✔ (customizing) ✔ , 5 ✔ (Amazon Web Service)
- 4. legacy.php { HTML += CSS += JAVASCRIPT += PHP += SQL }
- 8. Embedded servlet containers(undertow.io) jOOQ 3.xSpring MVC 4.x Spring Boot 1.5.x, Spring Framework 4.x, Spring Cloud AWS 1.2.x BackendAWS Elastic Beanstalk / JVM(Java 1.8) Presentation Application Business (Domain) Data Access
- 11. RPC Stub RPC Server SHARED LIBRARY
- 12. HTTP Client HTTP Server - (RESOURCE) - URI - (Verb) - HTTP Method - (Representations)
- 14. . . . . , , . (Codebase): . (Dependencies): . (Config): . (Backing services): . , , (Build, Release, Run): , . (Processes): . (Port binding): . (Concurrency): . (Disposability): . / (Dev/Prod parity): , . (Logs): . (Admin Process): (admin/management) .
- 15. Backend Frontend function getUsableMileage(){ if (FeatureToggle::create()->isEnable(FeatureToggle::USE_BE_MILEAGE)) { // Backend } // return $usable_mileage; } https://martinfowler.com/articles/feature-toggles.html
- 18. Eureka Client (service discovery) Ribbon (load balancer) Zuul Proxy (edge service) Eureka Server Hystrix Dashboard, Turbine Hystrix (circuit breaker)
- 23. legacy.php { require_once '/common/config.php'; require '/common/init.php'; include 'header'; include 'view'; include 'footer'; } Frontend
- 24. API GATEWAY
- 25. API GATEWAY
- 26. API GATEWAY
- 27. babel(ES6), sass, webpack Node.js v8.x http-proxy, requestExpress.js, Handlebars Vue.js v2.x axios gradle, babel(ES6), sass, webpack Java 1.8, Node.js v8.x Spring Cloud NetflixSpring MVC, Thymeleaf Vue.js v2.x axios Spring Boot 1.5.x
- 28. babel(ES6), sass, webpack Node.js v8.x http-proxy, requestExpress.js, Handlebars Vue.js v2.x axios gradle, babel(ES6), sass, webpack Java 1.8, Node.js v8.x Spring Cloud NetflixSpring MVC, Thymeleaf Vue.js v2.x axios Spring Boot 1.5.x
- 29. babel(ES6), sass, webpack Node.js v8.x http-proxy, requestExpress.js, Handlebars Vue.js v2.x axios gradle, babel(ES6), sass, webpack Java 1.8, Node.js v8.x Spring Cloud NetflixSpring MVC, Thymeleaf Vue.js v2.x axios Spring Boot 1.5.x
- 31. ORDER SYSTEM [ WEB ] USER-SERVICE API GATEWAY PRODUCT SYSTEM SCM SYSTEM EXTERNAL SYSTEMS MDM SYSTEM[ WEB ] BACK-OFFICE
- 33. ORDER SYSTEM [ WEB ] USER-SERVICE API GATEWAY PRODUCT SYSTEM SCM SYSTEM EXTERNAL SYSTEMS MDM SYSTEM[ WEB ] BACK-OFFICE
- 36. └── resources ├── application.yml # ├── application-local.yml # ├── application-dev.yml # ├── application-test.yml # ├── application-staging.yml # ├── application-production.yml # └── application-ec2.yml # AWS EC2 > java -jar application.jar --spring.profiles.active=dev,ec2 + OS environment variables (AWS Elastic Beanstalk) { export DB_USERNAME="order_service" export DB_PASSWORD="7%wo9;ttArRYMfYp" } https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html
- 37. AWS Elastic Beanstalk { WEB UI } AWS EC2 { SSH } AWS LAMBDA { WEB UI } WEB APP BATCH APP SERVERLESS APP
- 39. SERVICE#1 Config Server SERVICE#2 SERVICE#3 Config Repository Config Client Config Client Config Client
- 40. SERVICE#1 Config Server Config Repository Config Client └── resources ├── application.yml # Spring Boot └── bootstrap.yml # Spring Cloud > service#1.jar spring: application.name: application cloud.config.uri: https://config.arawn.io
- 41. Service discovery and configuration management with Apache Zookeeper. Service discovery and configuration management with Hashicorp Consul. Centralized external configuration management backed by a git repository. The configuration resources map directly to Spring `Environment` but could be used by non-Spring applications if desired.
- 42. Consul Server (Cluster) Consul Server (Cluster) SERVICE#1 Consul Server (Cluster) SERVICE#2 SERVICE#3 Git Repository Consul Client Consul Client Consul Template Jenkins application.yml https://www.consul.io DNS (load balancer)
- 43. https://github.com/hashicorp/consul-template Consul Server (Cluster) Consul Server (Cluster) SERVICE#1 Consul Server (Cluster) SERVICE#2 SERVICE#3 Git Repository Consul Client Consul Client Consul Template Jenkins application.yml DNS (load balancer)
- 44. datasource: username: '{cipher}65794a6492kfc627782d59534d4845355167' password: '{cipher}6575f2d938928525976712e6d7a679616641' AWS Key Management Service AWS LAMBDA Consul Server (Cluster) SERVICE#1 Git Repository Consul Client Jenkins application.yml DNS (load balancer)
- 48. ✔ (strangler patterns) ✔ (strangler application) ✔ Refactoring a Monolith into Microservices ✔ API ✔ Pattern: API Gateway / Backend for Front-End ✔ Netflix Zuul : Importance of Reverse Proxy in Microservices Architecture ✔ Cloud Native Java ✔ The Twelve-Factor app (12 )