Linux系统rsync实战操作

前面介绍了一些关于rsync的功能与一些具体的命令格式、参数的使用意义等，今天我们来聊一聊整个实际生产过程中的实战操作过程

今天介绍的是第三种模式——以守护进程的模式传输数据

一：整体环境

备份服务器端（BK-S）

[root@BS-S~]# cat /etc/redhat-release
CentOS release 6.5 (Final)
[root@BS-S ~]# uname -r
2.6.32-431.el6.x86_64
备份数据的客户端(BK-C)
[root@BS-C ~]# cat /etc/redhat-release
CentOS release 6.5 (Final)
[root@BS-C ~]# uname -r
2.6.32-431.el6.x86_64

二：配置过程

以下配置为备份数据服务器端

1、检查是否安装软件

[root@BK-S ~]# rpm -qa |grep "rsync"
rsync-3.0.6-9.el6_4.1.x86_64

2、配置rsync的配置文件/etc/rsync.conf

[root@BK-S ~]#cat /etc/rsyncd.conf
cat:/etc/rsyncd.conf: No such file or directory

显示系统无此文件，因此我们直接创建文件

[root@BK-S ~]# vi /etc/rsyncd.conf
##rsync config start
##created by root 2016-08-08 15:00
syncd.conf config start 以上为注释部分
uid = rsync
gid = rsync
use chroot = no
max connetctions = 200 最大连接数（并发）
timeout = 100 超时时间默认S单位
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
log file = /var/log/rsyncd.log
[backup] 模块名称可自定义任意名称
path = /backup/ 备份数据的路径
ignore errors 忽略错误
read only = false
list = false
hosts allow = 192.168.1.0/24
hosts deny = 0.0.0.0/32
auth users = rsync_backup 虚拟的用户用于连接认证
secrets file = /etc/rsync.password 认证的密码配置文件路径
##rsync config end

整个配置过程中注意中间的空格与书写规范

检查配置文件

[root@BK-S ~]# cat /etc/rsyncd.conf
##rsync config start
##created by root 2016-08-08 15:00
##rsync.conf config start
uid = rsync
gid = rsync
use chroot = no
max connetctions = 200
timeout = 100
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
log file = /var/log/rsyncd.log
[backup]
path = /backup/
ignore errors
read only = false
list = false
hosts allow = 192.168.1.0/24
hosts deny = 0.0.0.0/32
auth users = rsync_backup
secrets file = /etc/rsync.password
##rsync config end

3、格式化配置文件

[root@BK-S ~]#dos2unix /etc/rsync.conf 没有安装
-bash: dos2unix:command not found
[root@BK-S ~]#yum install dos2unix -y YUM进行安装
Loaded plugins:fastestmirror, refresh-packagekit, security
Loading mirrorspeeds from cached hostfile

• base: mirrors.zju.edu.cn
• extras: mirrors.zju.edu.cn

• updates: mirrors.zju.edu.cn
  base | 3.7 kB 00:00
  extras |3.4 kB 00:00
  updates |3.4 kB 00:00
  updates/primary_db | 2.0 MB 00:01
  Setting up InstallProcess
  ResolvingDependencies
  --> Runningtransaction check
  ---> Packagedos2unix.x86_64 0:3.1-37.el6 will be installed
  --> FinishedDependency Resolution
  DependenciesResolved

  Package Arch Version Repository Size
  ======================================Installing:
  dos2unix x86_64 3.1-37.el6 base 16 k
  TransactionSummary

  Install 1 Package(s)
  Total downloadsize: 16 k
  Installed size: 18k
  DownloadingPackages:
  dos2unix-3.1-37.el6.x86_64.rpm | 16kB 00:00
  Running rpm_check_debug
  RunningTransaction Test
  Transaction TestSucceeded
  RunningTransaction
  Installing : dos2unix-3.1-37.el6.x86_64 1/1
  Verifying : dos2unix-3.1-37.el6.x86_64 1/1
  Installed:
  dos2unix.x86_64 0:3.1-37.el6
  Complete!
  [root@BK-C]#dos2unix /etc/rsync.conf
  dos2unix:converting file /etc/rsync.conf to UNIX format ...

4、添加用户

[root@BK-S ~]#useradd rsync -s /sbin/nologin -M
[root@BK-S /]#mkdir backup
[root@BK-S /]#chown -R rsync.rsync /backup
[root@BK-S /]# ls -ll
drwxr-xr-x. 2 rsync rsync 4096 Aug 27 14:30 backup
dr-xr-xr-x. 2 root root 4096 Aug 15 19:15 bin
dr-xr-xr-x. 5 root root 1024 Aug 7 18:04 boot
drwxr-xr-x. 3 root root 4096 Aug 21 10:07 data
drwxr-xr-x. 19 root root 3860 Sep 2 05:05 dev

5、配置密码文件

[root@BK-S /]# echo "rsync_backup:rsync.conf">>/etc/rsync.password
[root@BK-S /]# cat /etc/rsync.password
rsync_backup:rsync.conf 认证用户：认证密码
因密码文件为明文，所以需要改变默认权限
[root@BK-S /]# chmod 600 /etc/rsync.password
[root@BK-S /]# ls -ld /etc/rsync.password
-rw-------. 1 root root 24 Sep 2 05:43 /etc/rsync.password

6、启动服务

[root@BK-S /]# rsync --daemon 启动服务后台运行
[root@BK-S /]# netstat -lntup |grep rsync 查看服务使用端口
tcp 0 0 0.0.0.0:873 0.0.0.0: LISTEN 2013/rsync
tcp 0 0 :::873 ::: LISTEN 2013/rsync
[root@BK-S /]# ps -ef |grep rsync
root 2013 1 0 05:45 ? 00:00:00 rsync --daemon
root 2018 1930 0 05:46 pts/0 00:00:00 grep rsync
至此备份数据的服务端配置结束

7、以下为客户配置过程

[root@BK-C ~]# echo "rsync.conf">/etc/rsync.password
[root@BK-C ~]# cat /etc/rsync.password
rsync.conf
[root@BK-C ~]# chmod 600 /etc/rsync.password
[root@BK-C ~]# ls -ld /etc/rsync.password
-rw-------. 1 root root 11 Sep 3 13:57 /etc/rsync.password
客户端配置结束

三：测试数据备份

[root@BK-C ~]# rsync -avzP /etc/hosts rsync_backup@192.168.1.2::backup --password-file=/etc/rsync.password
rsync: failed to connect to 192.168.1.2: No route to host (113)
rsync error: error in socket IO (code 10) at clientserver.c(124) [sender=3.0.6]

报错提示没有路由，表明服务端防火墙没有关闭

[root@BK-S backup]# /etc/init.d/iptables stop
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]

服务端关闭防火墙

[root@BK-C~]# rsync -avzP /etc/hosts rsync_backup@192.168.1.2::backup --password-file=/etc/rsync.password
sending incremental file list
hosts
322 100% 0.00kB/s 0:00:00 (xfer#1, to-check=0/1)
sent 141 bytes received 27 bytes 336.00 bytes/sec
total size is 322 speedup is 1.92

显示数据备份完成

备份服务器上查看是否备份成功

[root@BK-C~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
###########www.baidu.com################
###########www.baidu.com################
###########www.baidu.com################
###########www.baidu.com################
[root@BK-S backup]# ls -ll
total 4
-rw-r--r--. 1 rsync rsync 322 Aug 30 03:29 hosts
[root@BK-S backup]# cat hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
###########www.baidu.com################
###########www.baidu.com################
###########www.baidu.com################
###########www.baidu.com################

两台服务器上hosts文件内容相同，表明备份成功

[root@BK-C ~]# cd /tmp
[root@BK-C tmp]# ls
[root@BK-C tmp]# ls -ll
total 0
[root@BK-C tmp]# touch 123.txt
[root@BK-C tmp]# touch 321.txt
[root@BK-C tmp]# rsync -avzP /tmp/ rsync_backup@192.168.1.2::backup --
password-file=/etc/rsync.password
sending incremental file list
./
123.txt
0 100% 0.00kB/s 0:00:00 (xfer#1, to-check=2/4)
321.txt
0 100% 0.00kB/s 0:00:00 (xfer#2, to-check=1/4)
.ICE-unix/
sent 162 bytes received 53 bytes 430.00 bytes/sec
total size is 0 speedup is 0.00

服务端查看数据同步情况

[root@BK-S backup]# ls -ll
total 4
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 123.txt
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 321.txt
-rw-r--r--. 1 rsync rsync 322 Aug 30 03:29 hosts

测试--delete参数

[root@BK-S backup]# mkdir text
[root@BK-S backup]# mkdir text1
[root@BK-S backup]# mkdir text2
[root@BK-S backup]# mkdir text3
[root@BK-S backup]# touch 4565.bak
[root@BK-S backup]# touch 4565.txt
[root@BK-S backup]# ls -ll
total 20
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 123.txt
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 321.txt
-rw-r--r--. 1 root root 0 Sep 7 13:48 4565.bak
-rw-r--r--. 1 root root 0 Sep 7 13:48 4565.txt
-rw-r--r--. 1 rsync rsync 322 Aug 30 03:29 hosts
drwxr-xr-x. 2 root root 4096 Sep 7 13:48 text
drwxr-xr-x. 2 root root 4096 Sep 7 13:48 text1
drwxr-xr-x. 2 root root 4096 Sep 7 13:48 text2
drwxr-xr-x. 2 root root 4096 Sep 7 13:48 text3
[root@BK-C tmp]# rsync -avzP --delete /tmp/ rsync_backup@192.168.1.2::
backup --password-file=/etc/rsync.password
sending incremental file list
./
deleting text3/
deleting text2/
deleting text1/
deleting text/
deleting hosts
deleting 4565.txt
deleting 4565.bak
sent 91 bytes received 12 bytes 206.00 bytes/sec
total size is 0 speedup is 0.00

服务器端查看结果

[root@BK-S backup]# ls -ll
total 0
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 123.txt
-rw-r--r--. 1 rsync rsync 0 Sep 9 2016 321.txt

最终结果显示delete参数的作用就是：客户端有什么，远端服务器就有什么，客户备份目录下没有的，远端服务器目录下其它文件或目录就会被删除，此参数相当危险，实际生产环境中要小心使用

Linux系统rsync实战操作

原文：https://blog.51cto.com/mingongge/2555718