node_exporter.sh

#!/bin/bash
set -e

cd /tmp
wget https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz
tar xvf node_exporter-1.3.1.linux-amd64.tar.gz
useradd --no-create-home --shell /bin/false node_exporter
cp node_exporter-1.3.1.linux-amd64/node_exporter /usr/local/bin/
chown node_exporter:node_exporter /usr/local/bin/node_exporter

cat > /etc/systemd/system/node_exporter.service << EOF
[Unit]
Description=Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable node_exporter
systemctl start node_exporter