監控軟件monit使用

1. 安裝：sudo apt-get install monit

2. 配置文件：sudo vim /etc/monit/monitrc
   主要配置下面選項：
   SMTP服務器用于外發郵件，這里使用的是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都給自己發郵件
set alert sim@abc.com not {instance}

郵件格式
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

}

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

這份配置文件已經包含很多監控選項，可以根據需求設定

3. 啟動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監控項目，可以把配置文件保存在這里：/etc/monit/conf.d/
   • 監控磁盤剩余空間報警
     sudo vim /etc/monit/conf.d/storagespace

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

• 監控掛載的外部文件夾
  check filesystem Compal-NAS-Croissant with path /test/ABC
  if changed fsflags then alert

-監控網絡連接
check host WWW with address 192.20.1.40
if failed ping then alert