system resource check

#!/bin/bash

HOSTNAME=`hostname`
TODAY_TIME=`date +%m%d%H%M`

check_load(){
   THRESHOLD=15

   UPTIME=(`uptime | awk '{print $(NF-2) $(NF-1) $(NF)}' | sed 's/,/ /g'`)
   LOAD1M=${UPTIME[0]}
   LOAD5M=${UPTIME[1]}
   LOAD15M=${UPTIME[2]}

   RESULT=$(echo "$LOAD5M > $THRESHOLD" | bc)
   if [ $RESULT = '1' ]; then
      echo "$HOSTNAME : check load : ", "load.1m=$LOAD1M", "load.5m=$LOAD5M", "load.15m=$LOAD15M"
   else
      echo "$HOSTNAME : good load : ", "load.1m=$LOAD1M", "load.5m=$LOAD5M", "load.15m=$LOAD15M"
   fi

}

check_swap(){
   THRESHOLD=60

   SWAP=`free -m | grep Swap:`
   TOTAL=$(echo $SWAP | awk '{print $2}')
   USED=$(echo $SWAP | awk '{print $3}')
   ACTUAL=`echo "100*$USED/$TOTAL" | bc -l`

   RESULT=$(echo "$ACTUAL > $THRESHOLD" | bc)

   if [ $RESULT = '1' ]; then
      echo "$HOSTNAME : check swap : ", "total=$TOTAL", "used=$USED", "actual=$ACTUAL"
   else
      echo "$HOSTNAME : good swap : ", "total=$TOTAL", "used=$USED", "actual=$ACTUAL"
   fi
}

check_mem(){
   THRESHOLD=85

   TOTAL=`free | grep ^Mem | awk '{print $2}'`
   CACHE=`free | grep ^-/+ | awk '{print $3}'`
   ACTUAL=`echo "100*$CACHE/$TOTAL" | bc -l`

   MEM_RESULT=$(echo "$ACTUAL > $THRESHOLD" | bc)

   if [ $MEM_RESULT = '1' ]; then
      echo "$HOSTNAME : check mem : ", "total=$TOTAL", "buffer cache=$CACHE", "actual=$ACTUAL"
   else
      echo "$HOSTNAME : good mem : ", "total=$TOTAL", "buffer cache=$CACHE", "actual=$ACTUAL"
   fi
}

check_max_open_filecnt(){
   THRESHOLD=65535

   #PREFIX=65535
   #SPACE=`svs | grep ^path-`
   SPACE=`svs | grep api`
   while read -r device
   do
      DEVICE=($device)
      PID=`echo ${DEVICE[3]}| sed 's/,//g'`
      MAX_OPEN_FILES=`cat /proc/${PID}/limits | grep "Max open" |awk -F" " '{print $5}'`
      #echo $MAX_OPEN_FILES

      if [ "$MAX_OPEN_FILES" != "$THRESHOLD" ]; then
          echo "$HOSTNAME : check max open files : $MAX_OPEN_FILES", "PID:$PID"
      else
          echo "$HOSTNAME : good max open files : $MAX_OPEN_FILES", "PID:$PID"
      fi

   done <<< "$SPACE"
}

check_filesystem(){
   THRESHOLD=91

   # FILE SYSTEM
   SPACE=`df -lP | tail -n +2`
   while read -r device
   do
       DEVICE=($device)
       if [[ $DEVICE[0] != "/"* ]]; then
          continue
       fi

       usage=`echo ${DEVICE[4]} | sed 's/%//g'`
       if [[ ${DEVICE[5]} == "/" ]]; then
            #echo "filesystem.root.space=$usage"
            RESULT=$(echo "$usage > $THRESHOLD" | bc)

            if [ $RESULT = '1' ]; then
              echo "$HOSTNAME : check filesystem :", "filesystem.$mount.space=$usage"
            else
              echo "$HOSTNAME : good filesystem :", "filesystem.$mount.space=$usage"
            fi
       else
            mount=`echo ${DEVICE[5]} | sed 's/^\///'`

            RESULT=$(echo "$usage > $THRESHOLD" | bc)

            if [ $RESULT = '1' ]; then
              echo "$HOSTNAME : check filesystem :", "filesystem.$mount.space=$usage"
            else
              echo "$HOSTNAME : good filesystem :", "filesystem.$mount.space=$usage"
            fi
       fi

   done <<< "$SPACE"
}


main(){
   check_load
   check_filesystem
   check_mem
   check_swap
   check_max_open_filecnt
}

#sys.arg=1 servicename
main ${1}