Please clarify the mechanism for k8s service injection in Karaf/Blueprint

Please provide a sample code describing the preferred way of doing Kubernetes service injection in Karaf/Blueprint.

I believe this question is related to this trello board:

https://trello.com/c/vdIIbL2O/13-add-support-for-docker-kubenetes-environment-variables-for-container-linking-in-karaf-config-admin