Hello !

Does someone manage to use mgmt-gateway, with a FQDN, and the monitoring stack working ?

In my LAB, after upgrading from 10.2.3 to 20.2.0,
My dashboard was working fine, with grafana dashboards.

I decided to test mgmt-gateway.
I use a VIP with a specific DNS name pointing at that VIP.
I have a certificate generated with our internal PKI, valid for the DNS name and the VIP.

Dashboard works, but no monitoring anymore.
- Popups concerning alermanager :

Failed to execute prometheus
Error parsing Prometheus Alertmanager response: Expecting value
9/12/25 04:07 PM

- No graphs in dashboard, with errors "origin not allowed" in each panel

If I open Grafana directly, I see :
- that the VIP is used, not my DNS name, but none works.
- Grafana works but I can't see dashboards, and if I put a URL that should work (https://$VIP/grafana/d/edtb0oxdq/ceph-cluster), I have a message :

Failed to load dashboard
Unauthorized

Some more infos :

https://$DNS/grafana/dashboards => show the list of Dashboards
Open a dashboard show errors 'origin not allowed" on panels

https://$VIP/grafana/dashboards => cannot list the Dashboards, error Unauthorized

Concerning the Altermanger errors, I see thoses XHR calls in my browser, ending in HTTP error 400 Bad Request :
https://$DNS/api/prometheus?cluster_filter=true

I opened an issue here : https://tracker.ceph.com/issues/74164

--
Gilles
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