[moehm]

Good ol' Nagios does this, except maybe for pretty graphing. Maybe look into Icinga2 (fork of Nagios) for that.

The modern Version would be something like Prometheus with Grafana.

Zabbix might be too much for a homelab setup.

[mbirth]

Actually, Zabbix runs pretty well in a homelab setup. Doesn’t eat much resources with its 3 containers here.