Thomas Vitale Cloud Native Aarhus April 18th, 2024 Cloud Native Java With Spring Boot @vitalethomas

Systematic • Software Engineer • CNCF Ambassador, Oracle ACE Pro, Testcontainers Community Champion • Author of “Cloud Native Spring in Action” (Manning). • OSS contributor (Java, Spring, Cloud Native Technologies) Thomas Vitale thomasvitale.com @vitalethomas

@vitalethomas dev.java

From Traditional to Cloud Native Application Server, Embedded Server Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) @vitalethomas

spring.io

Moving to Containers Application Server, Embedded Server, Container Runtime (OCI) Application (Container) Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) @vitalethomas

Image pack build Cloud Native Buildpacks From source code to container image @vitalethomas Cloud Native Buildpacks https://buildpacks.io

Image pack build gradle bootBuildImage Cloud Native Buildpacks From source code to container image @vitalethomas Cloud Native Buildpacks https://buildpacks.io

Spring Boot and Native Executables The bene fi ts of GraalVM Instant Startup Low Resource Usage Instant Peak Performance @vitalethomas Reduced Surface Attack Compact Packaging

Spring Boot and Native Executables The downsides of GraalVM Slower Build Additional con fi guration might be needed @vitalethomas

Packaging Spring Boot JAR, Native, Container Image JAR OCI Image Gradle bootJar Maven package Gradle bootBuildImage Maven spring-boot:build-image @vitalethomas Native Gradle nativeCompile Maven -Pnative native:compile

Testcontainers Dev and Test Services OCI containers Run external dependencies as OCI containers, also at development time Data Layer Tests Ensure environment parity by testing the data layer with the real database Integration Tests Use containers for databases, message queues, and web servers @vitalethomas

Spring Observability Production-grade features Spring Boot Actuator ‣Health (liveness and readiness) ‣Management (loggers, con fi guration) ‣Flyway, Thread Dumps, Heap Dumps Micrometer ‣Uni fi ed Observation API ‣Instrumentation for metrics and traces ‣Prometheus, OpenTelemetry @vitalethomas

Moving to Kubernetes Application Server, Embedded Server, Container, Kubernetes Runtime (OCI) Middleware (Kubernetes) Application (Container) Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) Runtime (OCI) Application (Container) @vitalethomas

Continuous Development Code, Run, Test, Debug Development Workflow gradle bootRun flask --debug run yarn dev Dev & Test Services @vitalethomas

Configuration: Workload API Crossplane Composition @vitalethomas

Project Bootstrapping Backstage Software Templates @vitalethomas

Configuration: Implementation Crossplane Composition Workload API Serverless Deployment Service Binding Application Conventions @vitalethomas

Kubernetes Native Spring Boot Workload con fi guration and management Liveness Probe Con fi gMaps @vitalethomas Readiness Probe Secrets Service Bindings Runtime Reload

Generative AI @vitalethomas

Resources @vitalethomas

Resources Cloud Native Java with Spring Boot • Presentation source code • Spring AI • Spring CLI • LangChain4j Spring Boot • Serverless Java with Spring Boot • Securing the Supply Chain for Your Java Applications • Building AI-Ready Platforms - Symphony for Developer and Platform Engineer @vitalethomas

Thomas Vitale Cloud Native Aarhus April 18th, 2024 Cloud Native Java With Spring Boot @vitalethomas