在日常的运维工作中，我们经常会对服务器的磁盘使用情况进行巡检，以防止磁盘爆满导致的业务故障.
如果能编写一个合理完善的监控脚本，当磁盘使用率达到我们设置的阀值时，就自动发送报警邮件，以便我们及时获悉到快爆满的磁盘情况！下面分享一个脚本：
监控本机的根磁盘和home盘，当根磁盘使用率达到90%和home磁盘使用率达到95%的时候，发报警邮件至wangshibo@huanqiu.cn和liugang@huanqiu.cn[root@haunqiu-beta ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 50G 46G 12G 90% /tmpfs 32G 68K 32G 1% /dev/shm/dev/sda1 485M 40M 421M 9% /boot/dev/mapper/VolGroup-lv_home 836G 795G 673G 95% /home
取根磁盘当前利用率的百分值
[root@haunqiu-beta ~]# /bin/df -h|grep /dev/mapper/VolGroup-lv_root|awk -F" " '{print $5}'|cut -d"%" -f1 90取home盘当前利用率的百分值
[root@haunqiu-beta ~]# /bin/df -h|grep /dev/mapper/VolGroup-lv_home|awk -F" " '{print $5}'|cut -d"%" -f1 95 编写邮件报警脚本 [root@haunqiu-beta ~]# vim /root/root_disk.sh| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #!/bin/bash SERVER_IP=` ifconfig | grep 192.168.1| awk -F ":" '{print $2}' | cut -d " " -f1` ROOT_DISK=` /bin/df -h| grep /dev/mapper/VolGroup-lv_root | awk -F " " '{print $5}' | cut -d "%" -f1` HOME_DISK=` /bin/df -h| grep /dev/mapper/VolGroup-lv_home | awk -F " " '{print $5}' | cut -d "%" -f1` if [ $ROOT_DISK - ge 90 ]; then /usr/local/bin/sendEmail -f ops@huanqiu.cn -t wangshibo@huanqiu.cn -s smtp.huanqiu.cn -u " The ROOT_DISK of $SERVER_IP-$HOSTNAME is warning!" -o message-content- type =html -o message-charset=utf8 -xu ops@huanqiu.cn -xp zh@123bj -m "The ROOT_DISK of $SERVER_IP-$HOSTNAME，now use% is 90%，please deal with it as soon as possible" /usr/local/bin/sendEmail -f ops@huanqiu.cn -t liugang@huanqiu.cn -s smtp.huanqiu.cn -u " The ROOT_DISK of $SERVER_IP-$HOSTNAME is warning!" -o message-content- type =html -o message-charset=utf8 -xu ops@huanqiu.cn -xp zh@123bj -m "The ROOT_DISK of $SERVER_IP-$HOSTNAME，now use% is 90%，please deal with it as soon as possible" else echo "The ROOT_DISK of $SERVER_IP-$HOSTNAME is Enough to use" fi sleep 5 if [ $HOME_DISK - ge 95 ]; then /usr/local/bin/sendEmail -f ops@huanqiu.cn -t wangshibo@huanqiu.cn -s smtp.huanqiu.cn -u " The HOME_DISK of $SERVER_IP-$HOSTNAME is warning!" -o message-content- type =html -o message-charset=utf8 -xu ops@huanqiu.cn -xp zh@123bj -m "The HOME_DISK of $SERVER_IP-$HOSTNAME，now use% is 95%，please deal with it as soon as possible" /usr/local/bin/sendEmail -f ops@huanqiu.cn -t liugang@huanqiu.cn -s smtp.huanqiu.cn -u " The HOME_DISK of $SERVER_IP-$HOSTNAME is warning!" -o message-content- type =html -o message-charset=utf8 -xu ops@huanqiu.cn -xp zh@123bj -m "The HOME_DISK of $SERVER_IP-$HOSTNAME，now use% is 95%，please deal with it as soon as possible" else echo "The ROOT_DISK of $SERVER_IP-$HOSTNAME is Enough to use" fi |
设置计划任务
[root@haunqiu-beta ~]# crontab -e */30 * * * * /bin/bash -x /root/root_disk.sh > /dev/null 2>&1
-----------------------------------------------------------------------------------------------------------------
上面脚本中的邮件报警用的是sendemail，需要提前安装sendemail环境，安装操作如下： 1）先下载安装包到本地，解压。 [root@haunqiu-beta ~]# cd /usr/local/src/ [root@haunqiu-beta src]# wget -c http://caspian.dotconf.net/menu/Software/SendEmail/sendEmail-v1.56.tar.gz [root@haunqiu-beta src]# tar -zvxf sendEmail-v1.56.tar.gz [root@haunqiu-beta src]# cd sendEmail-v1.56 [root@haunqiu-beta sendEmail-v1.56]# cp -a sendEmail /usr/local/bin/ [root@haunqiu-beta sendEmail-v1.56]# chmod +x /usr/local/bin/sendEmail [root@haunqiu-beta sendEmail-v1.56]# file /usr/local/bin/sendEmail /usr/local/bin/sendEmail: a /usr/bin/perl -w script text executable2）安装下依赖
[root@haunqiu-beta sendEmail-v1.56]# yum install perl-Net-SSLeay perl-IO-Socket-SSL -y[root@haunqiu-beta sendEmail-v1.56]# /usr/local/bin/sendEmail -f from@huanqiu.cn -t to@huanqiu.cn -s smtp.huanqiu.cn -u "我是邮件主题" -o message-content-type=html -o message-charset=utf8 -xu from@huanqiu.cn -xp zh@123bj -m "我是邮件内容"
命令说明：
/usr/local/bin/sendEmail #命令主程序 -f from@uhanqiu.cn #发件人邮箱 -t to@huanqiu.cn #收件人邮箱 -s smtp.huanqi.cn #发件人邮箱的smtp服务器 -u "我是邮件主题" #邮件的标题 -o message-content-type=html #邮件内容的格式,html表示它是html格式 -o message-charset=utf8 #邮件内容编码 -xu from@huanqiu.cn #发件人邮箱的用户名 -xp zh@123bj #发件人邮箱密码 -m "我是邮件内容" #邮件的具体内容例如:
[root@haunqiu-beta alertscripts]# /usr/local/bin/sendEmail -f ops@huanqiu.cn -t wangshibo@huanqiu.cn -s smtp.huanqiu.cn -u "我是邮件主题" -o message-content-type=html -o message-charset=utf8 -xu ops@huanqiu.cn -xp zh@123bj -m "我是邮件内容"Oct 14 19:38:29 haunqiu-beta sendEmail[65454]: Email was sent successfully!
[root@haunqiu-beta alertscripts]#登陆wangshibo@huanqiu.cn邮箱，发现已经收到了上面发送的邮件：
