rsync+inotify自动进行同步

[root@master ~]# echo '192.168.1.10 master
> 192.168.1.20 slave' >> /etc/hosts [root@master ~]# 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:tWGSuqFJ1PeUXtWTvI/ItEIcDkOLmGNqItF07CxgplE root@master The key's randomart image is:
+---[RSA 2048]----+
| .E..  ..     o..|
|o= ..+ .oo.. . +.|
|=o.o* o ==*..   o|
|...+o. o B++.  . |
|o o.. o S.+o o ..|
|.o . o o  . + . .|
|    o .    .     |
|                 |
|                 |
+----[SHA256]-----+
[root@master ~]# ssh-copy-id -i slave
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host 'slave (192.168.1.20)' can't be established. ECDSA key fingerprint is SHA256:dnnDcAA2qVnA31i7mtr9LYJmH2veu2+r4t+19qUSqqw. ECDSA key fingerprint is MD5:0e:f3:c1:3c:dc:5f:12:66:ae:c9:01:51:66:db:bb:02. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@slave's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'slave'"
and check to make sure that only the key(s) you wanted were added.
[root@master ~]# scp /etc/hosts slave:/etc/
hosts                                                   100%  197    87.6KB/s   00:00    

[root@master ~]# ssh slave
Last login: Tue Dec 22 09:14:29 2020 from 192.168.1.250
[root@slave ~]# exit
登出
Connection to slave closed.

[root@master ~]# mkdir /test1
[root@master ~]# cd /test1
[root@master test1]# 

[root@slave ~]# mkdir /test2
[root@slave ~]# cd /test2
[root@slave test2]# 

 [root@master test1]# rpm -qa | grep rsync
 [root@master test1]# yum -y install rsync
 [root@master test1]# rpm -qa | grep rsync
rsync-3.1.2-10.el7.x86_64

[root@master test1]# mkdir -p a/b/c
[root@master test1]# ls
a

[root@master test1]# rsync -rv /test1/* root@slave:/test2
sending incremental file list
a/
a/b/
a/b/c/

sent 95 bytes  received 28 bytes  82.00 bytes/sec
total size is 0  speedup is 0.00

[root@slave test2]# ls -R a
a:
b

a/b:
c

a/b/c:

[root@master test1]# touch 1
[root@master test1]# chmod 777 1
[root@master test1]# ls
1  a
[root@master test1]# ls -l 1
-rwxrwxrwx. 1 root root 0 12月 22 09:25 1
[root@master test1]# rsync -pv /test1/* root@slave:/test2
skipping directory a
1

sent 75 bytes  received 35 bytes  73.33 bytes/sec
total size is 0  speedup is 0.00

[root@slave test2]# ls
1  a

[root@master test1]# ln -s 1 2
[root@master test1]# ls
1  2  a
[root@master test1]# rsync -lv /test1/* root@slave:/test2
skipping directory a
1
2 -> 1

sent 100 bytes  received 38 bytes  92.00 bytes/sec
total size is 1  speedup is 0.01

[root@slave test2]# ls
1  2  a

[root@slave test2]# touch 3
[root@slave test2]# ls
1  2  3  a

[root@master test1]# rsync -av --delete /test1/ root@slave:/test2
sending incremental file list
deleting 3
./
1
a/
a/b/
a/b/c/

sent 216 bytes  received 58 bytes  548.00 bytes/sec
total size is 1  speedup is 0.00

[root@slave test2]# ls
1  2  a

[root@master ~]# ls
anaconda-ks.cfg  inotify-tools-3.14.tar.gz
[root@master ~]# tar -zxf inotify-tools-3.14.tar.gz -C /usr/src
[root@master ~]# cd /usr/src/inotify-tools-3.14/
[root@master inotify-tools-3.14]# ./configure --prefix=/usr/local/inotify && make && make install
[root@master inotify-tools-3.14]# ln -s /usr/local/inotify/bin/* /usr/local/bin/

[root@master ~]# inotifywait -mrq --format %w%f -e create,delete,move,close_write /test1

[root@master ~]# touch /test1/www
[root@master ~]#

[root@master ~]# vim rsyncd.sh
#!/bin/bash
rs_script="inotifywait -mrq --format %w%f -e create,delete,move,close_write /test1"
ny_script="rsync -avz --delete /test1/* root@slave:/test2/"
$rs_script|while read file
do
         if [ -f $file ];then
             echo "备份开始..."
             $ny_script
             echo "备份结束..."
         else
            cd /test1 && rsync -az --delete ./ root@slave:/test2
         fi
done

[root@master ~]# chmod +x rsyncd.sh #添加权限
[root@master ~]# ./rsyncd.sh & #后台运行
 > 也可以使用nohup进行后台运行
    nohup  ./rsyncd.sh & 

[root@master test1]# mkdir -p a/b/c
[root@master test1]# touch test.txt
[root@master test1]# ln -s test.txt new.txt

[root@slave test2]# ls
a  new.txt  test.txt