I was wondering, is it possible to get host cpu metrics via incus? I see per-container incus_cpu_seconds_total, but not for the whole host. It would be quite useful to get host data without having to run extra agents, keeping the host 100% clean (for instance proxmox provides them).
Your best bet is to run node-exporter alongside Incus to get host-wide metrics, not just on CPU but also on RAM, storage, …
With our current work on IncusOS, we actually bundle node-exporter and have things set up so the Incus metrics endpoint on IncusOS actually embeds the node-exporter metrics.