check_nxload

#!/bin/sh
# 
# check_nxload
# Kyle Anderson, 2011, Under the GPL 2
#
# nxcheckload - sample script for calculation of the load for a node.
# Reports back a metric for NX to load balance.
# Not really a nagios check, but abusing nrpe for poor-mans load balancing.

# Be sure to use C numeric for calculations
export LC_NUMERIC=C

# The 3 variables of load from uptime
LOADXX=$(awk '{ printf("(100-%s)+(100-%s)+(100-%s)\n", $1, $2, $3); }' /proc/loadavg | bc -q)

# Add of total memory and free memory
Mt=$(awk 'BEGIN { N=0 } /MemTotal|MemFree/ { N+=$2; } END { print N }' /proc/meminfo)

# NBCPU = number of CPU
NBCPU=$(cat /proc/cpuinfo | grep ^processor | wc -l)

# CPU = Mhz of the CPU
CPU=$(cat /proc/cpuinfo | grep "cpu MHz" | head -n1 | cut -d':' -f2 | cut -d' ' -f2)

# Number of Xorg already launch and running.
UNB=$(ps aux | grep Xorg | grep -v grep | wc -l)

# Final calcul of the number of load.
echo "100 * $LOADXX + $Mt + ( $NBCPU * $CPU ) / 100 + $UNB * 100" | bc -q | cut -d. -f1