#!/bin/sh

### BEGIN INIT INFO
# Provides:          prometheus-node-exporter
# Required-Start:    $remote_fs
# Required-Stop:     $remote_fs
# Should-Start:      $all
# Should-Stop:       $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: system metrics exporter for prometheus
# Description:       prometheus-node-exporter exposes systems metrics over HTTP
#                    to be scraped and collected by prometheus server(s)
### END INIT INFO

set -e

. /lib/lsb/init-functions

DAEMON=/usr/bin/prometheus-node-exporter
OPTS="--collectors.enabled diskstats,filesystem,loadavg,mdadm,meminfo,netdev,netstat,sockstat,stat,vmstat"
USER="prometheus"
#CONFIG="/etc/monit/monitrc"
#DELAY="/etc/monit/monit_delay"
NAME=prometheus-node-exporter
DESC="prometheus-node-exporter system metrics"
#MONIT_OPTS=
PID="/var/run/$NAME.pid"

# Check if DAEMON binary exist
[ -f $DAEMON ] || exit 0

[ -f "/etc/default/$NAME" ] && . /etc/default/$NAME

case "$1" in
  start)
    log_daemon_msg "Starting $DESC" "$NAME"
    if start-stop-daemon --start --quiet --oknodo -m -b -c $USER \
                         --pidfile $PID --exec $DAEMON -- $OPTS
    then
      log_end_msg 0
    else
      log_end_msg 1
    fi
    ;;
  stop)
    log_daemon_msg "Stopping $DESC" "$NAME"
    if start-stop-daemon --retry TERM/5/KILL/5 --oknodo --stop --quiet \
                         --pidfile $PID --exec $DAEMON -- $OPTS
    then
      log_end_msg 0
    else
      log_end_msg 1
    fi
    ;;
  restart|force-reload)
    $0 stop
    $0 start
    ;;
  status)
    status_of_proc -p $PID $DAEMON $NAME
    ;;
  *)
    log_action_msg "Usage: /etc/init.d/$NAME {start|stop|reload|restart|force-reload|syntax|status}"
    ;;
esac

exit 0
