inotify+rsync监控实时同步

监控到Centos7-001机器上的网站内容发生变化时，就同步Centos7-001:/var/www/html/目录到Centos7-002上

Centos7-001上所做的操作

• 安装 rsync

# yum install  rsync -y

• 生成密钥对

  [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]-----+

• 传递公钥给 Centos7-002(可查看Centos机器上是否生成 /root/.ssh/authorized_keys文件)

# ssh-copy-id [email protected]
Are you sure you want to continue connecting (yes/no)? yes
[email protected]'s password: 

• 安装 inotify-tools 工具

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

• 利用 inotifywait 命令监控本机的 /var/www/html/目录，如发生变化就同步到Centos7-002:/web_backup上(写一个脚本 inotify.sh),在后台运行此脚本(Centos7-002上需要先安装 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/创建文件、目录，删除文件、目录，修改文件、目录

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

Centos7-002上所做的操作

• 安装 rsync

# yum install rsync -y

• 观察本机的 /web-back目录