Experimental Spring Boot Application Reconcilers for Kubernetes

• spring-boot

  when image has spring-boot dependency

  • add label apps.mononoke.local/framework with value spring-boot
  • add annotation boot.spring.io/version with value {boot-version}

• spring-boot-graceful-shutdown

  when image has one of spring-boot-starter-tomcat, spring-boot-starter-jetty, spring-boot-starter-reactor-netty or spring-boot-starter-undertow dependencies and spring-boot version 2.3+

  • default pod termination grace period to 30 seconds (this is the k8s default)
  • default boot property server.shutdown.grace-period to 80% of the pod's termination grace period

• spring-web-port

  when image has spring-web dependency

  • default boot property server.port to 8080
  • err if port is claimed by another container
  • add container port for server.port, if not already set

• spring-boot-actuator

  when image has spring-boot-actuator dependency

  • default boot property management.server.port to match server.port
  • default boot property management.endpoints.web.base-path to /actuator
  • add annotation boot.spring.io/actuator with value {scheme}:https://:{port}{base-path}
    • scheme is http by default, https when boot property management.server.ssl.enabled is true

• spring-boot-actuator-probes

  when image has spring-boot-actuator dependency version 2.3+

  • if boot property management.health.probes.enabled is disabled, skip remainder of opinion
  • default liveness probe timings to initial delay of 30 seconds (only set if no liveness probe is defined)
  • default liveness probe handler to HTTP GET
    • path is {boot:management.endpoints.web.base-path}/health/liveness
    • port is the management.server.port boot property
    • scheme http by default, https when boot property management.server.ssl.enabled is true
  • default readiness probe handler to HTTP GET
    • path is {boot:management.endpoints.web.base-path}/health/readiness
    • port is the management.server.port boot property
    • scheme http by default, https when boot pr