[CAMEL-21032] Generate k8s service for health endpoint

[tdiesler]

https://issues.apache.org/jira/browse/CAMEL-21032

[christophd]

Can we enhance the TraitHelper.exposesHttpService() logic to understand that there is a health endpoint exposed? Something needs to listen on the port to return the health status. I still do not understand what represents this health endpoint

[christophd]

the Kubernetes service should be exposed on port 80 by default so other components in the cluster can call the service with its pure domain name URL (e.g. http://my-service.default/ instead of http://my-service.default:8080/

[christophd]

Do you plan to implement this TraitHelper.configureHttpService(traitsSpec);?

[christophd]

I think we need similar for the Knative trait as it also checks on TraitHelper.exposesHttpService()

[tdiesler]

You can now do this ...

git clone https://github.com/tdiesler/camel-cloud-examples
cd camel-cloud-examples/spring-boot/http-roll-dice

make package k8s-apply

kubectl get svc
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1      <none>        443/TCP        6d2h
roll-dice    NodePort    10.110.21.17   <none>        80:32615/TCP   80s

curl localhost:32615/roll-dice
roll: 6

curl localhost:32615/actuator/health
{"status":"UP","groups":["liveness","readiness"]}