inotify+rsync監控實時同步

監控到Centos7-001機器上的網站內容發生變化時，就同步Centos7-001:/var/www/html/目錄到Centos7-002上

Centos7-001上所作的操做

• 安裝 rsync

# yum install  rsync -y

• 生成密鑰對

  [root@centos7-001 ~]# ssh-keygen 
  Generating public/private rsa key pair.
  Enter file in which to save the key (/root/.ssh/id_rsa): 
  Created directory '/root/.ssh'.
  Enter passphrase (empty for no passphrase): 
  Enter same passphrase again: 
  Your identification has been saved in /root/.ssh/id_rsa.
  Your public key has been saved in /root/.ssh/id_rsa.pub.
  The key fingerprint is:
  SHA256:3e6TNDwQTTP5BeDBusXs/7Ma/sx7LFVmSpa8PVEDNaY root@centos7-001
  The key's randomart image is:
  +---[RSA 2048]----+
  |           +*++= |
  |          ..++o.+|
  |           =.E oo|
  |         .o.+ *.+|
  |        S .*.o *o|
  |          ..* o.o|
  |           ..* o.|
  |           .+ *.o|
  |            .+oO*|
  +----[SHA256]-----+

• 傳遞公鑰給 Centos7-002(可查看Centos機器上是否生成 /root/.ssh/authorized_keys文件)

# ssh-copy-id root@192.168.195.129
Are you sure you want to continue connecting (yes/no)? yes
root@192.168.195.129's password:

• 安裝 inotify-tools 工具

# yum install epel-release -y
# yum install inotify-tools -y
# rpm -q inotify-tools

• 利用 inotifywait 命令監控本機的 /var/www/html/目錄，如發生變化就同步到Centos7-002:/web_backup上(寫一個腳本 inotify.sh),在後臺運行此腳本(Centos7-002上須要先安裝 rsync)

[root@centos7-001 ~]# cat inotify.sh 
#!/bin/bash
dir=/var/www/html/
remote_dir=192.168.195.129:/web_backup
inotifywait -rqm -e modify,create,move,delete $dir | while read a b c
do
    rsync -azP --delete $dir root@$remote_dir
done

• 在本地上的/var/www/html/建立文件、目錄，刪除文件、目錄，修改文件、目錄

  cd /var/www/html/
  cp -f /etc/passwd ./
  mkdir apeng
  mkdir aa
  echo inotify > aa/test.txt

Centos7-002上所作的操做

• 安裝 rsync

# yum install rsync -y

• 觀察本機的 /web-back目錄