nagios 监控xenserver cpu资源

cat check_xen_cpu.sh
#!/bin/sh


function usage()
{
        msg="$0 : use to check xenserver cpu usage for nagios"
        echo "****************************************************"
        echo -e "\033[1;94m${msg}\033[0m"
        echo -e "Usage:"
        echo -e "       $0 [-w warning -c critical]"
        echo -e "       $0 -w 80 -c 90 "
        echo "****************************************************"
}

if [ $# -eq 0 ];then
        warning=0.85
        critical=0.95
elif [ "$1" = "-w" ];then
        warning=`echo $2`
        shift
        shift
        if [ "$1" != "-c" ];then
                usage
                exit 1
        fi
        critical=`echo $2`
        shift
        shift
else
	usage 
	exit 1
fi

STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3


uuid_list=`xe host-cpu-list | grep uuid | awk '{print $5}'`
i=1
for uuid in $uuid_list
do
	cpu_usage[$i]=`xe host-cpu-param-get param-name=utilisation uuid=$uuid`
	let i=i+1
done

cpu_total=`echo ${cpu_usage[@]} | awk '{for(i=0;i<NF;i++) total+=$i; print total}'`
cpu_avg=`echo ${cpu_usage[@]} | awk '{for(i=0;i<NF;i++) total+=$i;print total/NF}'`
cpu_num=${#cpu_usage[@]}
performance="$cpu_num cpus;total:$cpu_total;avg:$cpu_avg | cpu_total=$cpu_total;$warning;$critical;0;$cpu_num;cpu_avg=$cpu_avg;;;0;100;"

function cmp_data(){
	if [ $1 \< $2 ];then
		echo "OK $performance"
		exit_code=$STATE_OK
	elif [ $1 \> $3 ];then
		echo "CRITICSL $performance"
		exit_code=$STATE_CRITICAL
	else
		echo "WARNING $performance"
		exit_code=$STATE_WARNING
	fi
}

cmp_data $cpu_avg $warning $critical
exit $exit_code