#前提已经可以通过mail或mutt客户端发邮件
1.先安装sendmail来发邮件
# yum -y install sendmail # /etc/init.d/sendmail start # chkconfig sendmail on
2.再安装邮件客户端
# yum -y install mutt
2.1 为了更好在邮件中显示，设置mutt客户端发送信息
# vim /etc/Muttrc set charset="utf-8" #设置发邮件编码 set envelope_from=yes set rfc2047_parameters=yes #解决附件乱码问题 set realname="报警" #发件人别名 set use_from=yes #指定是否显示别名 set from=monitor@test.com #发送人地址
方法1、通过加失败计数器来判断（误报率低）
#!/bin/bash DATE=`date +%F" "%H:%M` IP=/root/monitor/ip.txt #ip地址表 MAIL=zhenliang369@163.com for ip in $(cat $IP | sed '/^#/d') do for ((i=1;i<=3;i++)) do ping -c 1 $ip &>/dev/null [ $? -ne 0 ] && let FailCount+=1; done done [ -z $FailCount ] && FailCount=0 #当ping都正常时，FailCount值为空，就设置FailCount值为0，用整数比较 if [ $FailCount -eq 2 ];then #echo "$IP ping is failed." echo -e "Date : $DATE\nHost : $ip\nProblem : Ping is failed, Please check ! ! !" | mutt -s "Ping Monitor" $MAIL fi
#添加任务计划
# crontab -e
*/1 * * * * /root/monitor/ping.sh
done
方法二、通过ping一个包的状态判断（误报率低，建议此方法）
#!/bin/bash MAIL="baojingtongzhi@163.com huangxiaohong@loongtao.com" for ip in $(cat ip_list|sed "/^#/d") #ip_list是当前目录下IP表 do ping -c 1 $ip &>/dev/null #三个ping有一个能通，说明服务器正常 a=$? sleep 2 ping -c 1 $ip &>/dev/null b=$? sleep 2 ping -c 1 $ip &>/dev/null c=$? sleep 2 DATE=$(date +%F" "%H:%M) if [ $a -ne 0 -a $b -ne 0 -a $c -ne 0 ];then echo -e "Date : $DATE\nHost : $ip\nProblem : Ping is failed." | mail -s "Ping $ip failed From 255.252" $MAIL #else # echo "$ip ping is successful." fi done
方法三、通过丢包率来判断是否正常（误报率高）
#!/bin/bash while true do DATE=`date +%F" "%H:%M` MAIL="zhenliang369@163.com" for ip in $(cat ip_list|sed "/^#/d") #ip_list是当前目录下IP表 do num=$(ping -c 2 $ip |grep "100% packet loss" |wc -l) if [ $num == 1 ];then echo -e "Date : $DATE\nHost : $i\nProblem : Ping is failed." | mail -s "Ping $i failed From 255.252" $MAIL fi done sleep 30 done
