Update all dashboard datasource references from "prometheus" to
"victoriametrics" to match the declared datasource UID. Enable
prune and deleteDatasources to clean up the old Prometheus
(monitoring01) datasource from Grafana's database.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Dashboard for monitoring systemd across the fleet:
- Summary stats: failed/active/inactive units, restarts, timers
- Failed units table (shows any units in failed state)
- Service restarts table (top 15 services by restart count)
- Active units per host bar chart
- NixOS upgrade timer table with last trigger time
- Backup timers table (restic jobs)
- Service restarts over time chart
- Hostname filter to focus on specific hosts
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
