服务端：centos-4 192.168.5.128
客户端：centos-3 192.168.5.132
1、创建{1..10}.txt文件在a目录下
[root@centos-4 tmp]# rm -rf a
[root@centos-4 tmp]# mkdir a
[root@centos-4 tmp]# cd a
[root@centos-4 a]# touch {1..10}.txt
[root@centos-4 a]# ls
10.txt 1.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
2、同步到远端/tmp/a目录下
因为实在实现不了--password-file的方式同步就做了一个免密码登录
[root@centos-4 a]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
68:05:51:21:2f:e5:b8:a5:2a:99:5f:23:1a:28:f5:9b root@centos-4
The key's randomart p_w_picpath is:
+--[ RSA 2048]----+
| +o+. |
| B |
| o = |
| B |
| . = S |
| o + o |
|o = + o |
|. = = . |
| . E |
+-----------------+
[root@centos-4 a]# ssh-copy-id centos-3
root@centos-3's password:
Now try logging into the machine, with "ssh 'centos-3'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@centos-4 a]#
配置完私钥后.ssh/下会多了一个authorized_keys 文件
[root@centos-3 .ssh]# cat authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1vNA0sHBa4FFnMINAj6FM+FGInAP2+eIQ1JSIXJeRWOfM0KyLS3Nn5LzxvENBPrjJs1RR2x4Lhnuy0YL0Qy+wZLdcEIufZWcpRjDkLAhvgQjF7Mivd7mFhfPJ/uKUB/7Di4V/GzaW2SaG4ZWafFyB8igsBqnfw4wu0NyCVAjlpSe6tR1jao5MRMp8+6nksYHyHH8wafdGglF67cusk5fk9Kd0c4rSoiTjUX4EsREuE7mRBnK6UsSjvnJSsIHKYzDwEdB9ix+flTd9znPgEukWO85WN0h4wjqM8BAURRLDQnxKa0b9m+TrYsJnjr5xemj/Gr3q905ZWdoIDsupDNsLw== root@centos-4
同步两台服务器/tmp/a目录
[root@centos-4 a]# rsync -avpz /tmp/a root@centos-3:/tmp/
sending incremental file list
a/
a/1.txt
a/10.txt
a/2.txt
a/3.txt
a/4.txt
a/5.txt
a/6.txt
a/7.txt
a/8.txt
a/9.txt
sent 513 bytes received 206 bytes 479.33 bytes/sec
total size is 0 speedup is 0.00
查看客户端的centos-3服务器/tmp/a已经同步
[root@centos-3 tmp]# ls
a pear zabbix_agentd.log
cml pulse-gvsEPtT6wF1A zabbix_agentd.pid
gconfd-root pulse-ofsu0uqNK8ia zabbix_server.log
hsperfdata_root sess_9262c75f9c8625064dfabb6f1ffe9b1b zabbix_server.pid
keyring-8nmh6u sess_9pdslag3gffnplr3oh0mucvrr6
keyring-c6WZng yum.log
[root@centos-3 tmp]# cd a
[root@centos-3 a]# ls
10.txt 1.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-3 a]#
3、删除1.txt文件
[root@centos-4 a]# ls
10.txt 1.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-4 a]# rm -rf 1.txt
[root@centos-4 a]# ls
10.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-4 a]#
4、后面测试，当本地主机少了一个文件。而远端主机没有这个文件，删除远端主机的文件。
[root@centos-4 a]# rsync -avpz --delete /tmp/a root@centos-3:/tmp/
sending incremental file list
a/
deleting a/1.txt##显示删除了1.txt同步两台服务器的目录
sent 150 bytes received 16 bytes 332.00 bytes/sec
total size is 0 speedup is 0.00
[root@centos-4 a]#
检查客户端centos-3的目录已经少了1.txt文件，代表已经同步成功
[root@centos-3 a]# ls
10.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-3 a]#
5、每过1min监听这些目录，当发现本地和远程不一致，就再次同步
写一个shell的脚本执行同步两边的/tmp/a目录
[root@centos-4 ~]# vim rsync.sh
#!/bin/bash
rsync -avpz --delete /tmp/a root@centos-3:/tmp/
[root@centos-4 ~]# chmod a+x rsync.sh
测试脚本：
[root@centos-4 ~]# cd /tmp/a
[root@centos-4 a]# ls
10.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-4 a]# rm -rf 2.txt
[root@centos-4 a]# ls
10.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-4 a]# cd
[root@centos-4 ~]# ./rsync.sh
sending incremental file list
a/
deleting a/2.txt##表示脚本已经生效
sent 139 bytes received 16 bytes 310.00 bytes/sec
total size is 0 speedup is 0.00
[root@centos-4 ~]#
这样做执行脚本是还是会输出信息，所以改了一下
[root@centos-4 ~]# vim rsync.sh
#!/bin/bash
rsync -avpz --delete /tmp/a root@centos-3:/tmp/ >> /dev/null
为了实现实时同步服务端和客户端的/tmp/a目录，配置每1min执行一次命令
[root@centos-4 ~]# crontab -e
*/1 * * * * rsync -avpz --delete /tmp/a root@centos-3:/tmp/ >> /dev/null
crontab: installing new crontab
测试1min后是否可以实时同步目录，删除3.txt
[root@centos-4 a]# rm -rf 3.txt/
[root@centos-4 a]# ls
10.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
过了一分钟后查看centos-3的/tmp/a目录下3.txt有没有删除，最后同步
[root@centos-3 a]# ls
10.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt
[root@centos-3 a]#
