node_exporter_installer.sh

#!/bin/bash
wget https://github.com/prometheus/node_exporter/releases/download/v1.8.2/node_exporter-1.8.2.linux-amd64.tar.gz
tar xzvf node_exporter-1.8.2.linux-amd64.tar.gz
mv node_exporter-1.8.2.linux-amd64 /usr/local/bin/node_exporter

groupadd prometheus
useradd -g prometheus -m -d /var/lib/prometheus -s /sbin/nologin prometheus
mkdir /usr/local/prometheus
chown prometheus:prometheus -R /usr/local/prometheus

cat > /etc/systemd/system/node_exporter.service << EOF
[Unit]
Description=node_exporter-1.8.2
Documentation=https://prometheus.io/
After=network.target

[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/bin/node_exporter/node_exporter --collector.processes --collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($|/)
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl restart node_exporter.service
systemctl enable node_exporter.service

systemctl start node_exporter.service
systemctl status node_exporter