Netdata for me, it reports stats and metrics for VMs and containers too, automatically, and it's easy to install in Proxmox.
Netdata can also expose metrics to prometheus which you can then use in Grafana for more advanced/customizable dashboards https://learn.netdata.cloud/docs/exporting-metrics/prometheus
@yamdwich can netdata be self hosted?
Yes, it has a local webui by default. You don't have to connect it to their cloud, though I do because it's free and lets me get notifications if something goes offline.
I use Prometheus, Grafana and the proxmox exporter.
Important to note that I run this on a separate machine, not on the proxmox server itself!
I’ve used influx and grafana in the past
There are some good options here for further reading
I use grafana that gets data from a Zabbix server and also a proxmox exporter for prometheus, most VM also have a zabbix agent, mainly to monitor disk usage.
It's also possible to use Telegraf. I use it on different machines that sends data to InfluxDB that are displayed with Grafana
Im a nagios head here
Zabbix for everything here.
I use the HACS integration in Home Assistant. Then I can build automation based on events to notify, restart VMs, etc.
Do a search for 'Lm-sensors proxmox'
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