#!/bin/bash
##################################
# Zabbix monitoring script
#
# nginx:
#  - anything available via nginx stub-status module
#
##################################
# Contact:
#  vincent.viallet@gmail.com
##################################
# ChangeLog:
#  20100922        VV        initial creation
##################################
 
# Zabbix requested parameter
ZBX_REQ_DATA="$1"
ZBX_REQ_DATA_URL="$2"
 
# Nginx defaults
URL="http://127.0.0.1/nginx_status"
WGET_BIN="/usr/bin/wget"
 
#
# 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
 
# save the nginx stats in a variable for future parsing
NGINX_STATS=$($WGET_BIN -q $URL -O - 2> /dev/null)
 
# error during retrieve
if [ $? -ne 0 -o -z "$NGINX_STATS" ]; then
  echo $ERROR_DATA
  exit 1
fi
 
#
# Extract data from nginx stats
#
case $ZBX_REQ_DATA in
  active_connections)   echo "$NGINX_STATS" | head -1             | cut -f3 -d' ';;
  accepted_connections) echo "$NGINX_STATS" | grep -Ev '[a-zA-Z]' | cut -f2 -d' ';;
  handled_connections)  echo "$NGINX_STATS" | grep -Ev '[a-zA-Z]' | cut -f3 -d' ';;
  handled_requests)     echo "$NGINX_STATS" | grep -Ev '[a-zA-Z]' | cut -f4 -d' ';;
  reading)              echo "$NGINX_STATS" | tail -1             | cut -f2 -d' ';;
  writing)              echo "$NGINX_STATS" | tail -1             | cut -f4 -d' ';;
  waiting)              echo "$NGINX_STATS" | tail -1             | cut -f6 -d' ';;
  *) echo $ERROR_WRONG_PARAM; exit 1;;
esac
 
exit 0
