cephadm: A service should provide information about itself
As a normal user of Ceph without having much insight of the development and its inner life i expect that a fresh deployed service give me some hints and information about itself that i need to work with.
Think about a user deploys a Grafana service to a specific node. The first thing he wants to know after it has been finished is some information about the service. In the special case of Grafana, Alertmanager, Prometheus and all other existing or coming services that provide a UI, this might be the information how to reach it, e.g. by providing the IP address of the host/node or the URL of the UI of this service. I don't expect that every user knows that Grafana is running on port 3000 or Alertmanager on 9093.
Ideally each service should provide self explaining information/metadata that are helpful for users/admins.