Prometheus Node exporter

Prometheus Node exporter

• Homepage: https://github.com/prometheus/node_exporter
• Configuration files:
  • Linux: /etc/default/prometheus-node-exporter
  • macOS: ~/brew/etc/node_exporter.args
• Releases: https://github.com/prometheus/node_exporter/releases/
• http://localhost:9100/metrics

Installing Node Exporter

• Linux: apt install prometheus-node-exporter
• macOS: brew install node_exporter
• Docker Hub: docker pull prom/node-exporter && docker run prom/node-exporter (not recommended to deploy it as a Docker container )

• systemctl status prometheus-node-exporter

systemctl config files:

• prometheus-node-exporter.service
• prometheus-node-exporter-apt.timer

Configuring Prometheus to Scrape Node Exporter

Because Prometheus only scrapes exporters which are defined in the scrape_configs portion of its configuration file, we'll need to add an entry for Node Exporter, just like we did for Prometheus itself.

At the end of the scrape_configs block, add a new entry called node_exporter.

• sudo nano /etc/prometheus/prometheus.yml

global:
 scrape_interval: 15s

scrape_configs:
 - job_name: 'prometheus'
   scrape_interval: 5s
   static_configs:
     - targets: ['localhost:9090']
 - job_name: 'node_exporter'
   scrape_interval: 5s
   static_configs:
      - targets: ['localhost:9100']

Finally, restart Prometheus to put the changes into effect and verify status

• docker restart prometheus

Ubuntu

https://packages.ubuntu.com/search?keywords=prometheus-node-exporter

• Ubuntu 20.04 LTS, version: prometheus-node-exporter 0.18.1+ds-2
• Ubuntu 18.04 LTS, version prometheus-node-exporter 0.15.2

cat /etc/default/prometheus-node-exporter | grep -v "#" | grep .
ARGS="--collector.diskstats.ignored-devices=^(ram|loop|fd|(h|s|v|xv)d[a-z]|nvme\\d+n\\d+p)\\d+$ \
     --collector.filesystem.ignored-mount-points=^/(sys|proc|dev|run)($|/) \
     --collector.netdev.ignored-devices=^lo$ \
     --collector.textfile.directory=/var/lib/prometheus/node-exporter"

Logs

nodeexporter | ts=2023-01-12T18:23:45.617Z caller=tls_config.go:195 level=info msg="TLS is disabled." http2=false

Related terms

• Metric colletion tools: Metricbeat, sysstat, Grafana agent
• Prometheus Node exporter releases
• CloudWatch agent
• Zabbix agent
• Blackbox exporter
• Consul exporter
• cAdvisor

See also

• Prometheus, Prometheus Node exporter, /etc/default/prometheus-node-exporter, node_exporter.arg
• Metric colletion tools: prometheus-node-exporter, metricbeat, sysstat, zabbix_agent, Icingabeat, Telegraf, AWS CloudWatch agent

https://github.com/prometheus/node_exporter#using-docker