skills/ HoangNguyen0403/agent-skills-standard

spring-boot-deployment

Deploy Spring Boot apps with Docker, GraalVM native images, and graceful shutdown. Use when deploying Spring Boot apps as GraalVM native images, containers, or configuring shutdown.

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Spring Boot Deployment Standards

Priority: P0 (CRITICAL)

Containerize with Docker

  • Buildpacks: Use bootBuildImage (Gradle) or spring-boot:build-image (Maven) for OCI-compliant images.
  • Layered JAR: Use Layered JAR support to optimize Build Cache. Use multi-stage Dockerfile.
  • Security: Run as non-root user. Use eclipse-temurin or Distroless as base image.
  • Secrets: NEVER commit secrets to Git. Inject via environment variables, Kubernetes Secrets, or Vault (spring.config.import). Never bake secrets into image layers.

See implementation examples for multi-stage layered Dockerfile and graceful shutdown configuration.

Build GraalVM Native Images (AOT)

  • Use Case: Serverless or CLI tools requiring instant startup and low memory footprint.
  • Constraints: Use AOT transformations. Register reflection with RuntimeHints if needed.
  • Health Checks: Include Actuator endpoints specifically for Liveness and Readiness probes.

Tune Resources and Shutdown

  • Graceful Shutdown: Enable server.shutdown=graceful with 30s timeout.
  • Memory: Use -XX:+UseContainerSupport and -XX:MaxRAMPercentage=75.0.
  • Log Management: Log to stdout in Structured JSON for log aggregators.

Anti-Patterns

  • No Fat JARs in Docker: Use Layered JAR support for better caching.
  • No root container user: Run as restricted user (appuser/nobody).
  • No baked-in secrets: Use Env vars or ConfigMaps, never image layers.

References

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