Choose Your Own Adventure with JHipster & Kubernetes - Denver JUG 2020

Remember the choose your own adventure books that you used to read as a kid? This session is a reincarnation of a choose your own adventure book as a conference talk!

You'll learn about Spring Boot, Docker, and Kubernetes in this talk, along with the choices you make in the following areas:

* What kind of application architecture to build? Monolith or microservices?
* Would you like to use Java or Kotlin?
* MySQL, PostgreSQL, or MongoDB?
* Spring MVC or Spring WebFlux?
* Angular, React, or Vue.js?
* PWA or mobile app?
* Istio with Kubernetes or Kubernetes without Istio?

GitHub repos of demos:

* Monolith: https://github.com/mraible/healthy-hipster
* Microservices: https://github.com/mraible/djug-microservices

YouTube video: https://youtu.be/SolTvAXhaVc

Transcript

1. Ray Tsang and Matt Raible Choose Your Own Adventure with JHipster & K8s @saturnism | @mraible
2. Are you a Java developer?
3. Are you a Web developer?
4. Do you like web frameworks?
5. Hello, JHipster! https://jhipster.tech Application Generator Development Platform Popular Open Source Project Monoliths, Microservices, and Gateways
6. Who is Ray Tsang? Developer Advocate at Google Cloud Kubernetes Enthusiast JHipster Committer Backpacker, snowboarder, photographer @saturnism on Twitter
7. Who is Matt Raible? Developer Advocate at Okta Web Framework Enthusiast JHipster Committer Skier, rafter, classic VW fan @mraible on Twitter
8. JHipster Gives You Lots of Options Spring Boot Spring Security SQL or NoSQL Maven or Gradle Bootstrap Angular, React, or Vue End-to-End Tests Performance Tests 26,000+ options https://arxiv.org/abs/1710.07980
9. Choose Your Own Adventure
10. Spring Boot
11. Google Trends for Spring Boot
12. The Rest of the Java Pack
13. Docker
14. Kubernetes
15. Monolith vs. Microservice Architecture Monolith Microservices Pro Single app to manage Single CI/CD pipeline Low latency between calls Low coupling Faster build / deploy cycle per service Easier to scale out individual services Con Slow build / deploy cycle High coupling Harder to scale out Multiple apps to manage Multiple CI/CD pipeline Multiple EVERYTHING! High latency and issues between calls Proper service boundary
16. Monolith Legacy forever! At least only one pile of...
17. Microservices So you like the difficult stuff?
18. Unpopular Opinion "Monoliths are the future because the problem people are trying to solve with microservices doesn’t really line up with reality." https://changelog.com/posts/monoliths-are-the-future
19. Maven or Gradle?
20. Java, Kotlin, .NET, or Node? jhipster/jhipster-kotlin jhipster/jhipster-dotnetcore jhipster/generator-jhipster-nodejs
21. The End
22. FYI... Micronaut & Quarkus Support is in development https://github.com/jhipster/generator-jhipster-micronaut npm install -g generator-jhipster-micronaut mhipster https://github.com/jhipster/jhipster-quarkus npm install -g generator-jhipster-quarkus jhipster -d --blueprint quarkus
23. Which Authentication Type?
24. Authentication: Session, JWT, or OAuth 2.0? Because friends don't let friends write authentication!
25. MySQL, PostgreSQL, or MongoDB?
26. Spring MVC or Spring WebFlux?
27. CRUD with WebFlux? https://github.com/jhipster/generator-jhipster/issues/7608
28. What do you want to build? Monoliths 21 Points Health Blog Bug Tracker Microservices Online Store Blog + Store https://github.com/jhipster/jdl-samples
29. Angular, React, or Vue.js?
30. Comparing Angular, React, and Vue.js
31. Google Trends for Angular, React, and Vue.js
32. PWA or Mobile?
33. The End
34. Yes to PWA! <script> if ('serviceWorker' in navigator) { window.addEventListener('load', function() { navigator.serviceWorker.register('/service-worker.js') .then(function () { console.log('Service Worker Registered'); }); }); } </script> src/main/webapp/index.html
35. PWA Requires HTTPS @EnableWebSecurity public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.requiresChannel() .requestMatchers(r -> r.getHeader("X-Forwarded-Proto") != null) .requiresSecure(); } } SecurityConfiguration.java https://developer.okta.com/blog/2018/07/30/10-ways-to-secure-spring-boot
36. Want Ionic? Use Ionic4J!
37. Want React Native? Use Ignite JHipster!
38. Let's Get Started! start.jhipster.tech
39. High Code Quality and Performance by Default https://github.com/mraible/healthy-hipster
40. Where to deploy to?
41. Kubernetes Created by Google in 2014 Based on learnings from Google's internal orchestration tool Manages deployment of containers across a cluster of machines Currently managed by Cloud Native Foundation Single deployment target, multiple cloud/on-prem environments
42. Kubernetes You've chosen the path to become a YAML developer... Everything will be YAML from here on! Don't fear. JHipster will generate all the YAMLs for you!
43. With Istio or Without? • Kubernetes manages deployment of applications • Istio manages the services to service communication • Retries • Traces • Monitoring • L7 Routing • L7 Load Balancing (internal and external) • mTLS • Out of the box Observability with Jaeger, Kiali, Prometheus, Grafana
44. Kubernetes to the Cloud! Run Kubernetes sub-generator Deploy to GKE on GCP Have a look at K9s Who let the pods out?!? https://github.com/derailed/k9s
45. Additional Configuration for OAuth 2.0 JHipster uses Keycloak by default Configuration is not auto-generated for Kubernetes Remember to configure Issuer, Client ID, and Client Secret
46. Load Balancer, NodePort, or Ingress... JHipster Gateway has 2 functionalities • The frontend code • Routing ("/service/blog/api" → Blog Service) • Has Retries • But 1 extra hop Kubernetes has built-in URL mapping via Ingress • No retries
47. The End You survived today's encounter with YAML, and the paradox of choice. Take the JHipster adventure, and good luck! Congratulations!
48. Coming Soon: JHipster 7! https://github.com/jhipster/generator-jhipster/issues/10958
49. Questions? 49 Keep in Touch! @mraible / matt.raible@okta.com @saturnism / rayt@google.com Presentation speakerdeck.com/mraible Code github.com/mraible