[ceph-users] Octopus Grafana inside the dashboard

Hello I'm trying to get Grafana working inside the Dashboard. If I press on "Overall Performance" tab, I get an error, because the iframe tries to connect to the internal hostname, which cannot be resolved from my machine. If I directly open grafana, everything works. How can I tell the dashboard, to use the full domain name? I have tried to set "ceph dashboard set-grafana-api-url https://node01.mycorp.local:3000" but that does not work and always sets itself back to "https://node01:3000". Thanks in advance, Simon