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

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Ray Tsang and Matt Raible Choose Your Own Adventure with JHipster & K8s @saturnism | @mraible

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Are you a Java developer?

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Are you a Web developer?

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Do you like web frameworks?

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Hello, JHipster! https://jhipster.tech Application Generator Development Platform Popular Open Source Project Monoliths, Microservices, and Gateways

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Who is Ray Tsang? Developer Advocate at Google Cloud Kubernetes Enthusiast JHipster Committer Backpacker, snowboarder, photographer @saturnism on Twitter

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Who is Matt Raible? Developer Advocate at Okta Web Framework Enthusiast JHipster Committer Skier, rafter, classic VW fan @mraible on Twitter

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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

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Choose Your Own Adventure

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Spring Boot

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Google Trends for Spring Boot

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The Rest of the Java Pack

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Docker

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Kubernetes

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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

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Monolith Legacy forever! At least only one pile of...

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Microservices So you like the diﬃcult stuﬀ?

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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

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Maven or Gradle?

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Java, Kotlin, .NET, or Node? jhipster/jhipster-kotlin jhipster/jhipster-dotnetcore jhipster/generator-jhipster-nodejs

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The End

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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

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Which Authentication Type?

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Authentication: Session, JWT, or OAuth 2.0? Because friends don't let friends write authentication!

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MySQL, PostgreSQL, or MongoDB?

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Spring MVC or Spring WebFlux?

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CRUD with WebFlux? https://github.com/jhipster/generator-jhipster/issues/7608

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What do you want to build? Monoliths 21 Points Health Blog Bug Tracker Microservices Online Store Blog + Store https://github.com/jhipster/jdl-samples

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Angular, React, or Vue.js?

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Comparing Angular, React, and Vue.js

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Google Trends for Angular, React, and Vue.js

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PWA or Mobile?

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The End

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Yes to PWA! if ('serviceWorker' in navigator) { window.addEventListener('load', function() { navigator.serviceWorker.register('/service-worker.js') .then(function () { console.log('Service Worker Registered'); }); }); } src/main/webapp/index.html

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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

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Want Ionic? Use Ionic4J!

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Want React Native? Use Ignite JHipster!

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Let's Get Started! start.jhipster.tech

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High Code Quality and Performance by Default https://github.com/mraible/healthy-hipster

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Where to deploy to?

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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

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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!

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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

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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

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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

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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

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The End You survived today's encounter with YAML, and the paradox of choice. Take the JHipster adventure, and good luck! Congratulations!

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Coming Soon: JHipster 7! https://github.com/jhipster/generator-jhipster/issues/10958

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Questions? 49 Keep in Touch! @mraible / matt.raible@okta.com @saturnism / rayt@google.com Presentation speakerdeck.com/mraible Code github.com/mraible