Prometheus exporters

Documentation

official exporters	https://prometheus.io/docs/instrumenting/exporters/
writing exporters	https://prometheus.io/docs/instrumenting/writing_exporters/

Custom Exporters

pushgateway	push metrics to prometheus
node_exporter	dump metrics to a file, expose with node_exporter

Official Exporters

node_exporter	(official) general system resource usage
blackbox_exporter	(official) probe endpoints over HTTP/HTTPS/DNS/TCP/ICMP

3rd Party Exporters

Ok
netdata	cpu, processes, disks, network, entropy etc.
nginx-prometheus-exporter	monitor traffic
jail_exporter	monitor freebsd jail resource usage
digitalocean_exporter	monitor traffic, usage, costs
pf_exporter	monitor bytes in/out/blocked
grok_exporter	monitor logs
process_exporter	monitor processes and resource usage
Denylist
prometheus_smart_exporter	S.M.A.R.T. HDD info (python, requires systemd)
smartctl_exporter	S.M.A.R.T. HDD info (go)