31、服务器磁盘、内存、cpu使用率监控

31.1、监控磁盘：

#!/bin/sh
diskspace="`df -hT`"
IFS="\n"
disk_value="80"
echo "文件系统 类型 容量 已用 可用 已用% 挂载点"
for line in $diskspace;do
    disk=`echo $line | awk -v x=${disk_value} '{if((+$6>x)) print $1,$2,$3,$4,$5,$6,$7}'`
    use_disk_value="`echo $disk | awk '{print +$6}'`"
    if [ ${use_disk_value} -gt ${disk_value} ];then
        echo $disk
    fi
done

31.2、监控内存：

#!/bin/sh
mem_value="80"
mem="`free -m | awk 'NR==2{printf "Memory Usage: %sMB/%sMB %.2f%%\n",$3,$2,$3*100/$2 }'`"
use_mem_value="`echo $mem | awk '{printf "%.2f\n",+$4}'`"

if [ `echo "${use_mem_value}>${mem_value}" | bc` -eq 1 ];then
    echo "Warning: current memory usage is $mem"
fi

######################TestValue##########################
echo "当前内存使用情况：${mem}"
echo "当前内存使用百分比：${use_mem_value}"
echo "当前内存使用百分比是否超过${mem_value}：`echo "${use_mem_value}>${mem_value}" | bc`"
######################################################### 

31.3、监控cpu：

#!/bin/sh
load_value="0.7"
cpu_load="`top -bn1 | grep "load average:" | awk '{print $NF}'`"
cpu_num="`lscpu | grep "CPU(s):" | awk '{print $2}'`"
cpu_load_value="`awk -v x=${cpu_load} -v y=${cpu_num} 'BEGIN{printf "%.2f\n",x/y}'`"

if [ `echo "${cpu_load_value}>${load_value}" | bc` -eq 1 ];then
    echo "WARING：Current Cpu Load IS ${cpu_load_value}"
fi

##################################TEST_VALUE#######################################################
echo "Cpu15分钟的平均负载：${cpu_load}"
echo "Cpu总核数：${cpu_num}"
echo "Cpu15分钟的平均负载占Cpu总核数的多少：${cpu_load_value}"
echo "Cpu15分钟的平均负载占Cpu总核数的值是否大于${load_value}：`echo "${cpu_load_value}>${load_value}" | bc`"
###################################################################################################