zabbix_php-apc_check.sh

#!/bin/bash
##################################
# Zabbix monitoring script
#
# php-apc :
#  - anything available via apc.php page
#
##################################
# Contact:
#  vincent.viallet@gmail.com
##################################
# ChangeLog:
#  20110124	VV	initial creation
##################################

# Zabbix requested parameter
ZBX_REQ_DATA="$1"
ZBX_REQ_DATA_URL="$2"

# Nginx defaults
APC_STATUS_DEFAULT_URL="http://localhost/apc.php"
LINKS_BIN="/usr/bin/links"

#
# Error handling:
#  - need to be displayable in Zabbix (avoid NOT_SUPPORTED)
#  - items need to be of type "float" (allow negative + float)
#
ERROR_NO_ACCESS_FILE="-0.9900"
ERROR_NO_ACCESS="-0.9901"
ERROR_WRONG_PARAM="-0.9902"
ERROR_DATA="-0.9903" # either can not connect /	bad host / bad port
ERROR_STATS="-0.9904" # the value retrieved is invalid / can not be converted

# Handle host and port if non-default
if [ ! -z "$ZBX_REQ_DATA_URL" ]; then
  URL="$ZBX_REQ_DATA_URL"
else
  URL="$APC_STATUS_DEFAULT_URL"
fi

# save the nginx stats in a variable for future parsing
APC_STATS=$($LINKS_BIN $URL -dump 2> /dev/null)

# error during retrieve
if [ $? -ne 0 -o -z "$APC_STATS" ]; then
  echo $ERROR_DATA
  exit 1
fi

# convert GBytes / MBytes / KBytes to bytes
# Based on the 2nd field (unit)
convert_from_size() {
  value=$1
  unit=$2

  # validate the value is a number (not perfect but ...)
  echo $value | grep -E '^[0-9.]+$' 2>&1 > /dev/null
  if [ $? -ne 0 ]; then
    echo $ERROR_STATS
    exit 1
  fi

  case $unit in
    Bytes) 	echo "$value";;
    KBytes) echo "$value * 1024" | bc | cut -f1 -d. ;;
    MBytes) echo "$value * 1024 * 1024" | bc | cut -f1 -d. ;;
    GBytes) echo "$value * 1024 * 1024 * 1024" | bc | cut -f1 -d. ;;
  esac
}

# 
# Extract data from nginx stats
#
case $ZBX_REQ_DATA in
  version)				echo "$APC_STATS" | grep 'APC Version' 	| head -1             | awk '{print $3}';;
  cached_files_count)   echo "$APC_STATS" | grep 'Cached Files'	| head -1             | awk '{print $3}';;
  cached_files_size)    convert_from_size $(echo "$APC_STATS" | grep 'Cached Files'	| head -1 | awk '{print $5 " " $6}' | sed -e 's/(//' -e 's/)//');;
  hits) 				echo "$APC_STATS" | grep 'Hits'			| head -1             | awk '{print $2}';;
  misses) 				echo "$APC_STATS" | grep 'Misses'		| head -1             | awk '{print $2}';;
  request_rate) 		echo "$APC_STATS" | grep 'Request Rate'	| head -1             | awk '{print $5}';;
  hit_rate)   			echo "$APC_STATS" | grep 'Hit Rate' 	| head -1             | awk '{print $3}';;
  miss_rate) 			echo "$APC_STATS" | grep 'Miss Rate'	| head -1             | awk '{print $3}';;
  insert_rate) 			echo "$APC_STATS" | grep 'Insert Rate'	| head -1             | awk '{print $3}';;
  shm_size) 			echo "$APC_STATS" | grep 'apc.shm_size'	| head -1             | awk '{print $2}';;
  mem_free) 			convert_from_size $(echo "$APC_STATS" | grep 'Free'	| head -1 | awk '{print $2 " " $3}' | sed -e 's/(//' -e 's/)//');;
  mem_used) 			convert_from_size $(echo "$APC_STATS" | grep 'Used'	| head -1 | awk '{print $2 " " $3}' | sed -e 's/(//' -e 's/)//');;
  fragmentation) 		echo "$APC_STATS" | grep 'Fragmentation:'	| head -1         | awk '{print $2}' | sed -e 's/%//';;
  *) echo $ERROR_WRONG_PARAM; exit 1;;
esac

exit 0