node_exporter installation on rpi

node_exporter_setup.md

Installing node_exporter

Steps to install node_exporter

1. Add user for node_exporter

   sudo useradd --no-create-home --shell /bin/false node_exporter

2. Download node_exporter

   cd
   wget https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-arm64.tar.gz

3. Extract node_exporter

   tar xvf node_exporter-1.7.0.linux-arm64.tar.gz

4. Copy node_exporter to /opt

   sudo mv node_exporter-1.7.0.linux-arm64 /opt/node_exporter
   sudo chown -R node_exporter:node_exporter /opt/node_exporter

5. Create service file for systemd

   sudo nano /etc/systemd/system/node_exporter.service

6. Fillin as follows:

   [Unit]
   Description=Node Exporter
   Wants=network-online.target
   After=network-online.target
   
   [Service]
   User=node_exporter
   Group=node_exporter
   Type=simple
   ExecStart=/opt/node_exporter/node_exporter --collector.systemd
   
   [Install]
   WantedBy=multi-user.target
   

7. Start the service with systemd and verify it runs

   sudo systemctl daemon-reload
   sudo systemctl start node_exporter && sudo journalctl -f --unit node_exporter

8. On the prometheus server, dont' forget to add the static config for the collection of data!