node_exporter-init.d.sh

#!/bin/bash

cat > /etc/init.d/node_exporter <<END
#!/bin/sh
### BEGIN INIT INFO
# Provides:          node_exporter
# Required-Start:    \$local_fs \$network \$named \$time \$syslog
# Required-Stop:     \$local_fs \$network \$named \$time \$syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Description:       node_exporter service on localhost
### END INIT INFO

SCRIPT=/usr/local/bin/node_exporter
RUNAS=root

PIDFILE=/var/run/node_exporter.pid
LOGFILE=/var/log/node_exporter.log

start() {
  if [ -f "\$PIDFILE" ] && kill -0 \$(cat "\$PIDFILE"); then
    echo 'Service already running' >&2
    return 1
  fi
  echo 'Starting service…' >&2
  local CMD="\$SCRIPT &> \"\$LOGFILE\" & echo \\\$! > \$PIDFILE"
  su -c "\$CMD" \$RUNAS > "\$LOGFILE"
  echo 'Service started' >&2
}

stop() {
  if [ ! -f "\$PIDFILE" ] || ! kill -0 \$(cat "\$PIDFILE"); then
    echo 'Service not running' >&2
    return 1
  fi
  echo 'Stopping service…' >&2
  kill -15 \$(cat "\$PIDFILE") && rm -f "\$PIDFILE"
  echo 'Service stopped' >&2
}

case "\$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    start
    ;;
  *)
    echo "Usage: \$0 {start|stop|restart}"
esac
END
chmod +x /etc/init.d/node_exporter

cd /tmp
echo "============= starting node_exporter setup ============"
curl -L -O https://github.com/prometheus/node_exporter/releases/download/v1.0.0/node_exporter-1.0.0.linux-amd64.tar.gz
tar xvzpf node_exporter-1.0.0.linux-amd64.tar.gz
mv -f node_exporter-1.0.0.linux-amd64/node_exporter /usr/local/bin/node_exporter
/etc/init.d/node_exporter restart
echo "============= done ===================================="