node_exporter installation on ubuntu

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/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz

3. Extract node_exporter

   tar xvf node_exporter-0.18.1.linux-amd64.tar.gz

4. Copy node_exporter to /opt

   sudo mv node_exporter-0.18.1.linux-amd64 /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!

Don't forget to add systemctl enable node_exporter

❯ sudo systemctl status node_exporter
× node_exporter.service - Node Exporter
Loaded: loaded (/etc/systemd/system/node_exporter.service; enabled; preset: disabled)
Active: failed (Result: exit-code) since Sat 2024-05-11 19:23:23 CST; 5s ago
Duration: 2ms
Process: 8434 ExecStart=/opt/node_exporter/node_exporter --collector.systemd (code=exited, status=203/EXEC)
Main PID: 8434 (code=exited, status=203/EXEC)
CPU: 1ms

May 11 19:23:23 vmdocker.bayronq.local systemd[1]: Started Node Exporter.
May 11 19:23:23 vmdocker.bayronq.local systemd[8434]: node_exporter.service: Failed to locate executable /opt/node_exporter/node_exporter: Permission denied
May 11 19:23:23 vmdocker.bayronq.local systemd[8434]: node_exporter.service: Failed at step EXEC spawning /opt/node_exporter/node_exporter: Permission denied
May 11 19:23:23 vmdocker.bayronq.local systemd[1]: node_exporter.service: Main process exited, code=exited, status=203/EXEC
May 11 19:23:23 vmdocker.bayronq.local systemd[1]: node_exporter.service: Failed with result 'exit-code'.

Thank You!