Robot watcher for Linux services

services_robot.sh

#!/usr/bin/env bash

##this script will check mongodb and apache
##if that service is not running
##it will start the service and send an email to you
##if the restart does not work, it sends an email and then exits

##set the path ##this works for Ubuntu 14.04 and 16.04
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

##set your email address 
EMAIL="your-email@domain.com"

##list your services you want to check
SERVICES=( 'apache2' 'mongod' )

#### OK. STOP EDITING ####


 for i in "${SERVICES[@]}"
  do
 ###CHECK SERVICE####
 `pgrep $i >/dev/null 2>&1`
 STATS=$(echo $?)

 ###IF SERVICE IS NOT RUNNING####
 if [[  $STATS == 1  ]]

  then
  ##TRY TO RESTART THAT SERVICE###
  service $i start

  ##CHECK IF RESTART WORKED###
  `pgrep $i >/dev/null 2>&1`
  RESTART=$(echo $?)

  if [[  $RESTART == 0  ]]
   ##IF SERVICE HAS BEEN RESTARTED###
   then

    ##REMOVE THE TMP FILE IF EXISTS###
    if [ -f "/tmp/$i" ]; 
    then
     rm /tmp/$i
    fi

    ##SEND AN EMAIL###
    MESSAGE="$i was down, but I was able to restart it on $(hostname) $(date)  "
    SUBJECT="$i was down -but restarted-  on $(hostname) $(date) "
    echo $MESSAGE | mail -s "$SUBJECT" "$EMAIL"

   else
    ##IF RESTART DID NOT WORK###

    ##CHECK IF THERE IS NOT A TMP FILE###
    if [ ! -f "/tmp/$i" ]; then

     ##CREATE A TMP FILE###
     touch /tmp/$i

     ##SEND A DIFFERENT EMAIL###
     MESSAGE="$i is down on $(hostname)  at $(date)  "
     SUBJECT=" $i  down on $(hostname) $(date) "
     echo $MESSAGE  " I tried to restart it, but it did not work"  | mail -s "$SUBJECT" "$EMAIL"
    fi
  fi
 fi



  done
exit 0;