Comment 0 for bug 1982910

Host details dashboard in Grafana shows only empty graphs due to empty Hostname.
The Hostname variable tries to list hostnames by crawling this metric, node_scrape_collector_success[0]
However, this metric is not collected, and I guess this is expected to be collected via node-exporter.

A quick workaround is to update the query to the one that is used in Telegraf Host Metrics (by-host).

Query: system_load1
Regex: .*host="([^"]+)".*$

[0] https://opendev.org/openstack/charm-ceph-dashboard/src/branch/master/src/dashboards/host-details.json#L1223