node_exporter.sh

#!/bin/bash

# create node_exporter.service
cat > /etc/systemd/system/node_exporter.service <<END
[Unit]
Description=node_exporter service
After=network.target

[Service]
ExecStart=/usr/local/bin/node_exporter
Type=simple
PIDFile=/var/run/node_exporter.pid
Restart=on-failure

[Install]
WantedBy=default.target
END

chmod 644 /etc/systemd/system/node_exporter.service

cd /tmp
curl -Ls -o ./node_exporter.tar.gz https://github.com/prometheus/node_exporter/releases/download/v1.0.0/node_exporter-1.0.0.linux-amd64.tar.gz
tar xvzpf node_exporter.tar.gz --strip-components=1
chmod 755 ./node_exporter
mv ./node_exporter /usr/local/bin/node_exporter

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