spring-boot

README

gcr.io/paketo-buildpacks/spring-boot

The Paketo Spring Boot Buildpack is a Cloud Native Buildpack that contributes Spring Boot dependency information and slices an application into multiple layers.

Behavior

This buildpack will participate if all the following conditions are met

• <APPLICATION_ROOT>/META-INF/MANIFEST.MF contains a Spring-Boot-Version entry

The buildpack will do the following:

• Contributes Spring Boot version to org.springframework.boot.version image label
• Contributes Spring Boot configuration metadata to org.springframework.boot.spring-configuration-metadata.json image label
• Contributes Implementation-Title manifest entry to org.opencontainers.image.title image label
• Contributes Implementation-version manifest entry to org.opencontainers.image.version image label
• Contributes dependency information extracted from Maven naming conventions to the image's BOM
• Contributes Spring Cloud Bindings as an application dependency
  • This enables bindings-aware Spring Boot auto-configuration when CNB bindings are present during launch
• If <APPLICATION_ROOT>/META-INF/dataflow-configuration-metadata-whitelist.properties exists
  • Contributes Spring Cloud Data Flow configuration metadata to org.springframework.cloud.dataflow.spring-configuration-metadata.json image label
• If <APPLICATION_ROOT>/META-INF/MANIFEST.MF contains a Spring-Boot-Layers-Index entry
  • Contributes application slices as defined by the layer's index
• $BP_BOOT_NATIVE_IMAGE is set
  • Creates a GraalVM native image and removes existing bytecode.
• If the application is a reactive web application
  • Configures $BPL_JVM_THREAD_COUNT to 50

Configuration

Environment Variable	Description
$BP_BOOT_NATIVE_IMAGE	Whether to build a native image from the application. Defaults to false.
$BP_BOOT_NATIVE_IMAGE_BUILD_ARGUMENTS	Configure the arguments to pass to native image build
$BPL_SPRING_CLOUD_BINDINGS_ENABLED	Whether to auto-configure Spring Boot environment properties from bindings. Defaults to y.

License

This buildpack is released under version 2.0 of the Apache License.