@Mang0Musztarda

To add to what @florent said, here's the complete picture:

Why your command failed:

1. Wrong URL: localhost:9004 is the internal port that only listens on
   127.0.0.1. It's proxied through xo-server at /openmetrics/metrics.

2. Wrong token: The error "Query authentication does not match server setting"
   means your Bearer token doesn't match the one configured in the plugin.

Correct approach:

1. Get your secret from: Settings → Plugins → OpenMetrics → "Prometheus secret"

2. Use the proxied endpoint:

   curl -H "Authorization: Bearer <your-actual-secret>" \                                                                                                                                                                                   
        http://<your-xo-server>/openmetrics/metrics                                                                                                                                                                                         
                                                                                                                                                                                                                                            
   

3. For health checks (no auth required):
   curl http://<your-xo-server>/openmetrics/health
   Returns: {"status":"ok"}

Full documentation is available at:
https://docs.xen-orchestra.com/advanced#openmetrics--prometheus-integration

It covers Prometheus configuration, available metrics, Grafana dashboards,
alerting rules, and troubleshooting.

@MajorP93 Thanks for sharing your Grafana dashboard! It could indeed be a nice
addition to link it from the official docs as a community example.

@Mang0Musztarda

To add to what @florent said, here's the complete picture:

Why your command failed:

1. Wrong URL: localhost:9004 is the internal port that only listens on
   127.0.0.1. It's proxied through xo-server at /openmetrics/metrics.

2. Wrong token: The error "Query authentication does not match server setting"
   means your Bearer token doesn't match the one configured in the plugin.

Correct approach:

1. Get your secret from: Settings → Plugins → OpenMetrics → "Prometheus secret"

2. Use the proxied endpoint:

   curl -H "Authorization: Bearer <your-actual-secret>" \                                                                                                                                                                                   
        http://<your-xo-server>/openmetrics/metrics                                                                                                                                                                                         
                                                                                                                                                                                                                                            
   

3. For health checks (no auth required):
   curl http://<your-xo-server>/openmetrics/health
   Returns: {"status":"ok"}

Full documentation is available at:
https://docs.xen-orchestra.com/advanced#openmetrics--prometheus-integration

It covers Prometheus configuration, available metrics, Grafana dashboards,
alerting rules, and troubleshooting.

@MajorP93 Thanks for sharing your Grafana dashboard! It could indeed be a nice
addition to link it from the official docs as a community example.