监控软件monit使用

1. 安装：sudo apt-get install monit

2. 配置文件：sudo vim /etc/monit/monitrc
   主要配置下面选项：
   SMTP服务器用于外发邮件，这里使用的是AWS Simple Mail Service
   set mailserver email-smtp.us-west-xx.amazonaws.com port 587
   username "AKIAJxxxxxxxxxxxxxxxx" password "Axxxxxxxxxxxxxxxxxxxxxxxxxxx"
   using tlsv1
   with timeout 30 seconds

收集人
#email address which will receive monit alerts
set alert sim@abc.com

如果不需要monit每次reload都给自己发邮件
set alert sim@abc.com not {instance}

邮件格式
set mail-format {
from: sim@abc.com
subject: XXX alert -- $EVENT $SERVICE
message: $EVENT Service $SERVICE
Date: $DATE
Action: $ACTION
Host: XXX Server
Description: $DESCRIPTION

        Monitor System

}

启用http
Enable httpd: set httpd port 2812
#Then: sudo monit reload
#Then: localhost:2812

这份配置文件已经包含很多监控选项，可以根据需求设定

3. 启动monit：sudo monit

4. 其它常用命令
   sudo monit status
   sudo service monit status
   sudo monit reload = sudo service monit restart

Check log:
sudo tail -f /var/log/monit.log
grep sshd /var/log/monit.log

Check syntax:
sudo monit -t

5. 如果需要定制自己的监控项目，可以把配置文件保存在这里：/etc/monit/conf.d/
   • 监控磁盘剩余空间报警
     sudo vim /etc/monit/conf.d/storagespace

check filesystem Media with path /dev/sdb1df
if space usage > 90% then alert

• 监控挂载的外部文件夹
  check filesystem Compal-NAS-Croissant with path /test/ABC
  if changed fsflags then alert

-监控网络连接
check host WWW with address 192.20.1.40
if failed ping then alert