Enhanced Observability

This is a placeholder issue to group smaller tasks together to provide better Observability support for Spring Boot users.

Info enhancements

• Add details about the JVM, e.g.: name, vendor, version: https://github.com/spring-projects/spring-boot/pull/28136
• Add details about the OS, e.g.: arch, name, version: https://github.com/spring-projects/spring-boot/pull/28907
• https://github.com/spring-projects/spring-boot/pull/39799
  • Add the list of used profiles: https://github.com/spring-projects/spring-boot/pull/38356
  • Boot/Framework/Cloud/ Data/etc. versions? (also see "arbitrary records from the manifest file" below): https://github.com/spring-projects/spring-boot/pull/38356
  • https://github.com/spring-projects/spring-boot/issues/22924
• Add details about the available resources e.g.: cpu, memory
  • https://github.com/spring-projects/spring-boot/pull/38371
  • https://github.com/spring-projects/spring-boot/pull/41262
• https://github.com/spring-projects/spring-boot/pull/41205
• https://github.com/spring-projects/spring-boot/pull/44704
• https://github.com/spring-projects/spring-boot/pull/48959
• Add network-related details: host, ip
• Enhance StartupInfoLogger with some of these details

See:

• An all-in-one implementation example for some of the features above: RuntimeInfoContributor
• An example json output

Health enhancements

• Add OOB health support for Feign clients: this should go to Spring Cloud OpenFeign, Spring Boot might provide support to handle the Health response (see: this solution), related: https://github.com/spring-projects/spring-boot/issues/36953
• Metrics/tracing for health indicators

Spring Security enhancements

• /whoami endpoint: show principal and granted authorities

The list is still in progress and very likely to evolve in the near future.