node-exporter
https://github.com/prometheus/node_exporter
available in buster as .deb
Install smartmontools without recommnded packages, otherwise it will install
the mailutils (default) or bsd-mailx package.
sudo apt install --no-install-recommends smartmontools
sudo apt install prometheus-node-exporter
TLS auth
- https://medium.com/@dominicafuwape/tls-client-authentication-for-node-exporter-3a0b029f4d6d
- https://www.robustperception.io/using-letsencrypt-with-the-node-exporter
Textfile collector
https://github.com/prometheus/node_exporter#textfile-collector
cat /var/lib/prometheus/node-exporter/README.textfile
Default path set by node-exporter installed as debian package:
/var/lib/prometheus/node-exporter
Push to prometheus
A custom, ansible managed systemd service push-prometheus-metrics.service is triggered by
push-prometheus-metrics.timer on a regular basis and pushes all node-exporter
metrics to https://prometheus-pushgateway.oas.varac.net,
using /usr/local/bin/push-prometheus-metrics.
Community collector scripts
https://github.com/prometheus-community/node-exporter-textfile-collector-scripts
checked out in ~/project/monitoring/prometheus/exporters/node-exporter-textfile-collector-scripts
Issues
Missing temp metrics on raspberry
Node exporter apparently doesn't track this metric and this was super easy to do by myself.
https://github.com/fgrosse/pi-temp
Metrics
CPU count
https://github.com/prometheus/node_exporter/blob/master/example-rules.yml#L4:
count(node_cpu{mode="idle"}) without (cpu,mode)