监控linux中CPU 内存 磁盘数据的shell脚本(图文)

#!/bin/bash
#filename seerver_moniter.sh

mem_quota=20
hd_quota=50
cpu_quota=80
 
# watch memory usage
 
watch_mem()
{
  memtotal=`cat /proc/meminfo |grep "MemTotal"|awk '{print $2}'`
  memfree=`cat /proc/meminfo |grep "MemFree"|awk '{print $2}'`
  cached=`cat /proc/meminfo |grep "^Cached"|awk '{print $2}'`
  buffers=`cat /proc/meminfo |grep "Buffers"|awk '{print $2}'`
 
  mem_usage=$((100-memfree*100/memtotal-buffers*100/memtotal-cached*100/memtotal))
 
  if [ $mem_usage -gt $mem_quota ];then
    mem_message="WARN! The Memory usage is over than $mem_usage%"
    return 1
    else
    return 0
  fi
}
# watch disk usage
 
watch_hd()
{
  sda1_usage=`df |grep 'sda1'|awk '{print $5}'|sed 's/%//g'`
  sda2_usage=`df |grep 'sda2'|awk '{print $5}'|sed 's/%//g'`
  lv01_usage=`df |grep opt|awk '{print $4}'|sed 's/%//g'`
 
  if [ $sda1_usage -gt $hd_quota ] || [ $sda2_usage -gt $hd_quota ] || [ $lv01_usage -gt $hd_quota ]; then
    hd_message="WARN! The Hard Disk usage is over than $hd_quota%"
    return 1
    else
    return 0
  fi
}

# watch cpu usage in one minute
get_cpu_info()
{
  cat /proc/stat|grep '^cpu[0-9]'|awk '{used+=$2+$3+$4;unused+=$5+$6+$7+$8} END{print used,unused}'
}
 
watch_cpu()
{
  time_point_1=`get_cpu_info`
  sleep 60
  time_point_2=`get_cpu_info`
  cpu_usage=`echo $time_point_1 $time_point_2|awk '{used=$3-$1;total=$3+$4-$1-$2;print used*100/total}'`
 
  if [[ $cpu_usage > $cpu_quota ]]; then
    cpu_message="WARN! The CPU Usage is over than $cpu_quota%"
    return 1
    else
    return 0
  fi
}
 
proc_cpu_top10()
{
  proc_busiest=`ps aux|sort -nk3r|head -n 11`
}

report=/root/server_report.log
watch_mem
if [ $? -eq 1 ]; then
  date >> $report
  echo "$mem_message" >> $report
fi
 
watch_hd
if [ $? -eq 1 ]; then
  date >> $report
  echo "$hd_message" >> $report
fi
 
watch_cpu
if [ $? -eq 1 ]; then
  date >> $report
  echo "$cpu_message" >> $report
  proc_cpu_top10
  echo "$proc_busiest" >> $report
fi
 
if [ -a $report ]; then
  mail -s "CUP/MEM/DISK Stat of Alarm" monitor@jb200.com < $report 
  rm -rf $report #为看到测试结果，可注释此行
fi