linux系统CPU内存磁盘监控发送邮件脚本

#!/bin/bash
export PATH
export LANG=zh_CN.UTF-8
#
#
#top之后输入数字1,可以查看每颗CPU的情况.
#
#
#先配置好mailx邮箱账号密码:
#cat>/etc/mail.rc<<"EOF"
#set sendcharsets=iso-8859-1,utf-8
#set from=xxx@163.com
#set smtp=smtp.163.com
#set smtp-auth-user=xx@163.com
#set smtp-auth-password=xxx
#set smtp-auth=login
#EOF
#文件存放位置
#
#判断是否安装bc
ping -c 2 www.baidu.com || exit 5
[ `echo "1 > 2"|bc` ] || yum install bc -y
sleep 3
[ `rpm -qa|grep dos2unix` ] || yum install dos2unix -y
sleep 3

#
#
#时间
readonly times=$(date +%Y"/"%m"/"%d" "%k":"%M)
#服务器IP
readonly machine=$(ip add | grep inet|grep -v 'inet6\|127.0.0.1'|awk '{ print $2 }' | sed 's/\/.*$//')
readonly names=$(hostname)
#cpu个数
readonly cpuinfos=$(cat /proc/cpuinfo|grep processor|wc -l)
#在线用户数
readonly onlines='2'
#cpu负载阈值
readonly cpuload='80'
#判断用户在线数
userd=$(top -n 1|grep users|awk -F '[, ]+' '{print $6}')
whos=$(who)
if [ $userd > $onlines ];then
echo "$times $machine 当前在线用户数: $whos"
fi

#
#
function top_check(){
#服务器运行多久
runup=$(top -n 1|grep user|awk -F '[, ]+' '{print $5}')
#用户空间占用CPU百分比
cpuus=$(top -n 1|grep Cpu|awk -F "," '{print $1}'|awk -F " " '{print $2}')
#内核空间占用CPU百分比
cpusy=$(top -n 1|grep Cpu|awk -F "," '{print $2}'|awk -F " " '{print $2}')
#改变过优先级的进程占用CPU的百分比
cpuni=$(top -n 1|grep Cpu|awk -F "," '{print $3}'|awk -F " " '{print $2}')
#空闲CPU百分比
cpuid=$(top -n 1|grep Cpu|awk -F "," '{print $4}'|awk -F " " '{print $2}')
#I/O等待占用CPU的百分比
cpuwa=$(top -n 1|grep Cpu|awk -F "," '{print $5}'|awk -F " " '{print $2}')
#硬中断占用CPU的百分比
cpuhi=$(top -n 1|grep Cpu|awk -F "," '{print $6}'|awk -F " " '{print $2}')
#软中断占用CPU的百分比
cpusi=$(top -n 1|grep Cpu|awk -F "," '{print $7}'|awk -F " " '{print $2}')
#虚拟 CPU 等待实际 CPU 的时间的百分比
cpust=$(top -n 1|grep Cpu|awk -F "," '{print $8}'|awk -F " " '{print $2}')
}

function load_time(){
#一分钟负载
load1=$(top -n 1|grep user|awk -F '[, ]+' '{print $11}')
#五分钟负载
load5=$(top -n 1|grep user|awk -F '[, ]+' '{print $12}')
#十五分钟负载
load15=$(top -b -n 1|grep user|awk '{print $NF}')
}

function load_mem(){
#内存总容量
memtotal=$(($(top -n 1|grep buff/cache|awk -F '[, ]+' '{print $4}') / 1024))
#当前空闲内存
memfree=$(($(top -n 1|grep buff/cache|awk -F '[, ]+' '{print $7}') / 1024))
#当前已使用内存
memused=$(($(top -n 1|grep buff/cache|awk -F '[, ]+' '{print $10}') / 1024))
#内存buff/cache
membuff=$(($(top -n 1|grep buff/cache|awk -F '[, ]+' '{print $13}') / 1024))
#swap总容量
swaptotal=$(($(top -n 1|grep avail|awk -F '[, ]+' '{print $3}') / 1024))
#swap当前空闲
swapfree=$(($(top -n 1|grep avail|awk -F '[, ]+' '{print $6}') / 1024))
#swap当前已使用
swapused=$(($(top -n 1|grep avail|awk -F '[, ]+' '{print $9}') / 1024))
#swap内存avail Mem
swapavail=$(($(top -n 1|grep avail|awk -F '[, ]+' '{print $11}') / 1024))
}

function echo_run(){
echo "$times $machine 运行多久: $runup 分钟 "
}

function echo_cpu(){
echo "$times $machine 用户空间占用CPU百分比: $cpuus "
echo "$times $machine 内核空间占用CPU百分比: $cpusy "
echo "$times $machine 改变过优先级的进程占用CPU的百分比: $cpuni "
echo "$times $machine 空闲CPU百分比: $cpuid "
echo "$times $machine I/O等待占用CPU的百分比: $cpuwa"
echo "$times $machine 硬中断占用CPU的百分比: $cpuhi "
echo "$times $machine 软中断占用CPU的百分比: $cpusi "
echo "$times $machine 虚拟 CPU 等待实际 CPU 的时间的百分比: $cpust "
}

function echo_mem(){
echo "$times $machine 内存总容量: $memtotal M "
echo "$times $machine 空闲内存: $memfree M "
echo "$times $machine 已使用内存: $memused M "
echo "$times $machine 内存buff/cache: $membuff M "
echo "$times $machine swap总共: $swaptotal M "
echo "$times $machine swap空闲: $swaptotal M "
echo "$times $machine swap已使用: $swapused M "
echo "$times $machine swap内存avail Mem: $swapavail M "
}

function echo_load(){
echo "$times $machine 1分钟CPU负载: $load1 "
echo "$times $machine 5分钟CPU负载: $load5 "
echo "$times $machine 15分钟CPU负载: $load15 "
}

#调用函数
top_check
load_time
load_mem
#
if [ `echo "$load1 > $cpuinfos"|bc` -eq 1 ];then
readonly runlog="/tmp/runs.log"
echo_run >$runlog
readonly loadlog="/tmp/load.log"
echo_load >$loadlog
readonly cpulog="/tmp/cpus.log"
echo_cpu >$cpulog
readonly memlog="/tmp/mems.log"
echo_mem >$memlog
#发送邮件
dos2unix -k $runlog
dos2unix -k $loadlog
dos2unix -k $cpulog
dos2unix -k $memlog
mailx -s "服务器$names $machine" lumia98@vip.qq.com < $runlog
mailx -s "服务器$names $machine" lumia98@vip.qq.com < $loadlog
mailx -s "服务器$names $machine" lumia98@vip.qq.com < $cpulog
mailx -s "服务器$names $machine" lumia98@vip.qq.com < $memlog
fi

#判断I/O wa是否过高
if [ `echo "$cpuwa > 60"|bc` -eq 1 ];then
readonly ioslogs="/tmp/wa.log"
iostat -cdx 3 > $ioslogs
dos2unix -k $ioslogs
mailx -s "服务器$names $machine的负载wa%" lumia98@vip.qq.com < $ioslogs
fi

#判断磁盘空间不足
disks=$(df | grep /dev|grep -v "shm\|boot\|devtmpfs"|awk '{print $5}'|sed 's/\%.*$//')
for x in $disks
do
if [ $x -gt 70 ]; then
disklog="/tmp/disk.log"
df -h >$disklog
dos2unix -k $disklog
mailx -s "服务器$names $machine" lumia98@vip.qq.com < $disklog
fi
done