Cloud Native Spring - Migrating Traditional Apps.

on YouTube ↗49m

" summary

Five concrete migration steps: replace external app server with embedded Tomcat and executable JAR (or move to WebFlux or serverless), containerize with Cloud Native Buildpacks (paketo) producing layer jars and Java 11, externalize config via Spring Cloud Config from Git or env vars, make instances disposable with graceful shutdown and 20s timeout, and add observability with Actuator + Micrometer for Prometheus metrics. Demos build images, fetch config, and expose liveness/readiness; the final Kubernetes deploy to three replicas mostly works though the live demo hits a deployment issue.

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" chapters (12)

1. 0:00Intro
2. 3:15Application Server - Traditional WAR/EAR artifacts deployed to an application server
3. 4:09Application Server - Cloud Native
4. 11:43Containerization Packaging Spring Boot apps as Docker images
5. 12:48Working with Docker Images
6. 17:29Code and Configuration
7. 17:49Configuration - Traditional Configuration files and environment variables
8. 18:50Configuration - Cloud Native
9. 27:37Application Lifecycle - Traditional
10. 28:38Application Lifecycle - Cloud Native Disposable and stateless applications
11. 34:12Health Checks Liveness and readiness probes
12. 45:04Cloud Native Spring in Action With Spring Boot and Kubernetes

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