

If you’re looking for this you can use something like uptime kuma, which pings each service and looks for a specific response or it will ping you
I doubled down recently and now have Grafana dashboards + alerts for all of my proxmox hosts, their containers etc.
Alerts are mainly mean CPU, memory or disk utilization > 80% over 5 minutes
I also get all of my notifications via a self hosted ntfy instance :~)
Technitium is much easier to set up than pihole/adguard IMO, as it supports recursive resolving or DoH/DoT out of the box.
It also supports mirroring root servers, clustering etc. I switched last week and I’m very happy with it