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#!/bin/bash

export PATH=$PATH:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

#######################################################################################################
# Please do not modify this file                                                                      #
# Plese create /usr/lib64/nagios/plugins/bc/load_trigger.txt with updated triggers if necessary.      #
#######################################################################################################

custom_trigger=/usr/lib64/nagios/plugins/bc/load_trigger.txt;

parameter_measured=load; 
measured_value=$(echo "$(awk '{print $1}' /proc/loadavg)/1" | bc);
uptime_days=$(echo "$(awk '{print $1}' /proc/uptime)/(60*60*24)" | bc);
display_message="$parameter_measured = $measured_value";
core_count=$(grep -w processor /proc/cpuinfo|wc -l);

if [ -f $custom_trigger >/dev/null 2>&1 ]
then
source $custom_trigger;
fi

cpu_user=;
cpu_nice=;
cpu_sys=;
cpu_iowait=;
cpu_irq=;
cpu_soft=;
cpu_steal=;
cpu_guest=;
cpu_gnice=;
cpu_idle=;

cpu_report=/usr/lib64/nagios/plugins/bc/bc_cpu.txt;

field_count=$(tail -2 $cpu_report | head -1 | awk '{ print NF }')

while [ $field_count -gt 0 ]
do
field_name=$( tail -2 $cpu_report | head -1 | awk "{print $"$field_count"}" | sed 's/%//g');
field_value=$( tail -1 $cpu_report | awk "{print $"$field_count"}");
field_count=$(( $field_count - 1 ));

if [ $field_name == "usr" ]
then
cpu_user=$(echo $field_value | bc);
elif [ $field_name == "nice" ]
then
cpu_nice=$(echo $field_value | bc);
elif [ $field_name == "sys" ]
then
cpu_sys=$(echo $field_value | bc);
elif [ $field_name == "iowait" ]
then
cpu_iowait=$(echo $field_value | bc);
elif [ $field_name == "irq" ]
then
cpu_irq=$(echo $field_value | bc);
elif [ $field_name == "soft" ]
then
cpu_soft=$(echo $field_value | bc);
elif [ $field_name == "steal" ]
then
cpu_steal=$(echo $field_value | bc);
elif [ $field_name == "guest" ]
then
cpu_guest=$(echo $field_value | bc);
elif [ $field_name == "gnice" ]
then
cpu_gnice=$(echo $field_value | bc);
elif [ $field_name == "idle" ]
then
cpu_idle=$(echo $field_value | bc);
fi

done

cpu_usage_percentage=$( echo "100 - $cpu_idle" | bc );

if [ $core_count -lt 4 ]
then
critical_trigger_value=$(( $core_count + 1 ));
elif [ $core_count -lt 8 ]
then
critical_trigger_value=$(( $core_count + 2 ));
elif [ $core_count -lt 16 ]
then
critical_trigger_value=$(( $core_count + 3 ));
elif [ $core_count -lt 32 ]
then
critical_trigger_value=$(( $core_count + 4 ));
elif [ $core_count -lt 64 ]
then
critical_trigger_value=$(( $core_count + 5 ));
elif [ $core_count -ge 64 ]
then
critical_trigger_value=$(( $core_count + 6 ));
fi

print_perf_labels() {

if [ ! -z $cpu_user >/dev/null 2>&1 ]
then
printf "cpu_user=$cpu_user;;;; ";
fi
if [ ! -z $cpu_nice >/dev/null 2>&1 ]
then
printf "cpu_nice=$cpu_nice;;;; "
fi
if [ ! -z $cpu_sys >/dev/null 2>&1 ]
then
printf "cpu_sys=$cpu_sys;;;; "
fi
if [ ! -z $cpu_iowait >/dev/null 2>&1 ]
then
printf "cpu_iowait=$cpu_iowait;;;; "
fi
if [ ! -z $cpu_irq >/dev/null 2>&1 ]
then
printf "cpu_irq=$cpu_irq;;;; "
fi
if [ ! -z $cpu_soft >/dev/null 2>&1 ]
then
printf "cpu_soft=$cpu_soft;;;; "
fi
if [ ! -z $cpu_steal >/dev/null 2>&1 ]
then
printf "cpu_steal=$cpu_steal;;;; "
fi
if [ ! -z $cpu_guest >/dev/null 2>&1 ]
then
printf "cpu_guest=$cpu_guest;;;; "
fi
if [ ! -z $cpu_gnice >/dev/null 2>&1 ]
then
printf "cpu_gnice=$cpu_gnice;;;; "
fi
if [ ! -z $cpu_idle >/dev/null 2>&1 ]
then
printf "cpu_idle=$cpu_idle;;;; "
fi
if [ ! -z $uptime_days >/dev/null 2>&1 ]
then
printf "uptime_days=$uptime_days"d";;;; "
fi

}

which bc >/dev/null 2>&1
if [ $? -eq 0 ]
then

which mpstat >/dev/null 2>&1
if [ $? -eq 0 ]
then

if [ $measured_value -gt $critical_trigger_value ]
then
printf "$parameter_measured CRITICAL - $display_message" 
printf '|' 
printf "$parameter_measured=$measured_value;;;; ";
echo -n "cpu_usage_percentage=$cpu_usage_percentage%;;;; ";
print_perf_labels;
exit 2;

else
printf "$parameter_measured OK - $display_message" 
printf '|' 
printf "$parameter_measured=$measured_value;;;; ";
echo -n "cpu_usage_percentage=$cpu_usage_percentage%;;;; ";
print_perf_labels;
exit 0;
fi

else

printf "$parameter_measured CRITICAL - mpstat command required for monitoring is missing"
printf '|'
printf "$parameter_measured=0;;;; ";
echo -n "cpu_usage_percentage=$cpu_usage_percentage%;;;; ";
print_perf_labels;
exit 2;

else

printf "$parameter_measured CRITICAL - bc command required for monitoring is missing"
printf '|'
printf "$parameter_measured=0;;;; ";
echo -n "cpu_usage_percentage=$cpu_usage_percentage%;;;; ";
print_perf_labels;
exit 2;