node_exporter.sh

#!/bin/bash
set -e

VERSION="0.15.2"
ARCHITECTURE=$(uname -m)

if [[ ${ARCHITECTURE} == "x86_64" ]] 
  then
    ARCHITECTURE="amd64"
fi

cd /tmp/

wget -q https://github.com/prometheus/node_exporter/releases/download/v${VERSION}/node_exporter-${VERSION}.linux-${ARCHITECTURE}.tar.gz

tar zxfv node_exporter-${VERSION}.linux-${ARCHITECTURE}.tar.gz
mv -v /tmp/node_exporter-${VERSION}.linux-${ARCHITECTURE}/node_exporter /usr/local/bin/node-exporter

# systemd manifest
cat <<EOF > /etc/systemd/system/node-exporter.service
[Unit]
Description=Prometheus node exporter
After=local-fs.target network-online.target network.target
Wants=local-fs.target network-online.target network.target

[Service]
ExecStart=/usr/local/bin/node-exporter
Type=simple
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

# start service
systemctl enable node-exporter.service
systemctl start node-exporter.service