The objective of this story is to expose Prometheus metrics for CPS monitoring.
String Boot actuator Prometheus endpoint can be used to expose default micrometer metrics.
Impacted repos: cps and oom

See:

• https://docs.spring.io/spring-boot/docs/2.5.2/reference/htmlsingle/#actuator.endpoints
• https://docs.spring.io/spring-boot/docs/2.5.2/reference/htmlsingle/#actuator.metrics.export.prometheus
• https://docs.spring.io/spring-boot/docs/2.5.2/actuator-api/htmlsingle/#prometheus

Scope

1. CPS-Core
2. DMI-Plugin

(CPS-Temporal has no actuator endpoint yet and wil be done later separately)

OOM Changes affected:

https://gerrit.onap.org/r/gitweb?p=oom.git;a=blob;f=kubernetes/cps/values.yaml;h=2312a4994d3f8c3d4375e8c169f148176b232186;hb=HEAD

define a port in the service section for actuator endpoints

(Bell Canada has already done this internally and can help if needed)

AC:

• Default Prometheus metrics are exposed using actuator endpoint
• Actuator is using a different port than the one used by cps users for application endpoints.
  • this will affect the existing actuators too (info,health,loggers), hence the need for updates in OOM (it uses health check and possibly info. loggers is probably not used)