Add node_exporter script for init.d (#1059)

* Add node_exporter script for init.d

Signed-off-by: gentlejo <josungil@gmail.com>

examples/init.d/node_exporter

@@ -0,0 +1,63 @@
+#!/bin/bash
+
+RETVAL=0
+PROG="node_exporter"
+EXEC="/etc/node_exporter/node_exporter"
+LOCKFILE="/var/lock/subsys/$PROG"
+OPTIONS="-web.listen-address=:9201"
+
+# Source function library.
+if [ -f /etc/rc.d/init.d/functions ]; then
+  . /etc/rc.d/init.d/functions
+else
+  echo "/etc/rc.d/init.d/functions is not exists"
+  exit 0
+fi
+
+start() {
+  if [ -f $LOCKFILE ]
+  then
+    echo "$PROG is already running!"
+  else
+    echo -n "Starting $PROG: "
+    nohup $EXEC $OPTIONS >/dev/null 2>&1 &
+    RETVAL=$?
+    [ $RETVAL -eq 0 ] && touch $LOCKFILE && success || failure
+    echo
+    return $RETVAL
+  fi
+}
+
+stop() {
+  echo -n "Stopping $PROG: "
+  killproc $EXEC
+  RETVAL=$?
+  [ $RETVAL -eq 0 ] && rm -r $LOCKFILE && success || failure
+  echo
+}
+
+restart ()
+{
+  stop
+  sleep 1
+  start
+}
+
+case "$1" in
+  start)
+    start
+    ;;
+  stop)
+    stop
+    ;;
+  status)
+    status $PROG
+    ;;
+  restart)
+    restart
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|restart|status}"
+    exit 1
+esac
+exit $RETVAL