一、实验环境
CentOS版本： 6.6(2.6.32.-504.el6.x86_64)
Rsync版本： Rsync-3.0.6（系统自带）
Sersync版本：sersync2.5.4_64bit_binary_stable_final.tar.gz（下载上传）
二、准备工作
查看系统是否支持inotify及参数优化：
[root@backup ~]# ls -l /proc/sys/fs/inotify/
------------------
总用量 0
0 dr-xr-xr-x 0 root root 0 12月 4 14:04 ..
0 dr-xr-xr-x 0 root root 0 12月 4 11:35 .
0 -rw-r--r-- 1 root root 0 12月 4 11:35 max_user_watches
0 -rw-r--r-- 1 root root 0 12月 4 11:35 max_user_instances
0 -rw-r--r-- 1 root root 0 12月 4 11:35 max_queued_events
------------------
返回以上内容，则系统支持inotify。这一步可能博友不太明白，本文实验是sersync实时同步，和支持inotify有什么关系。这是因为sersync实时监控时会调用 max_user_watches和 max_queued_events这两个文件
max_user_watches #可实时监控的目录的最大个数，该值默认为8192
max_queued_events #可实时监控的最大的队列事件， 超出这个值的事件将被丢弃。该值默认为16384
[root@backup ~]# cat /proc/sys/fs/inotify/*
16384
128
8192
[root@backup inotify]# echo 50000000 > max_user_watches
[root@backup inotify]# cat max_user_watches
50000000
[root@backup inotify]# echo 327679 > max_queued_events
[root@backup inotify]# cat max_queued_events
327679
关闭防火墙: service iptables stop #(服务端，客户端)均关闭
chkconfig iptables off
关闭selinux:
sed -i 's/SELINUX=disabled/SELINUX=enforcing/g' /etc/selinux/config #(服务端，客户端)均关闭
init 6 重启系统一定要！
三、Rsync服务端配置
[root@backup ~]# vi /etc/rsyncd.conf
#rsyncd.conf,create 2015-07-30,linuxzkq
uid = rsync
gid = rsync
use chroot = no
max connections = 200
timeout = 300
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
log file = /var/log/rsyncd.log
ignore errors
read only = false
list = false
hosts allow = 192.168.0.0/24
hosts deny = 0.0.0.0/32
auth users = rsync_backup #此为虚拟用户
secrets file = /etc/rsync.password
[cc]
path = /cc/
保存退出！
[root@backup ~]# echo "rsync_backup:8700389">/etc/rsync.password #创建同步自动认证的用户名与密码
[root@backup ~]# cat /etc/rsync.password
rsync_backup:8700389
[root@backup ~]# chmod 600 /etc/rsync.password #处于安全考虑，赋予600权限
[root@backup ~]# ll /etc/rsync.password
-rw------- 1 root root 21 Jul 30 21:36 /etc/rsync.password
[root@backup ~]# mkdir /cc #创建服务端同步目录
[root@backup ~]# useradd rsync -s /sbin/nologin
[root@backup ~]# chown -R rsync.rsync /cc
[root@backup ~]# rsync --daemon #表示以守护进程的方式启动
[root@backup ~]# netstat -tunlp|grep 873
tcp 0 0 0.0.0.0:873 0.0.0.0:* LISTEN 28631/rsync
tcp 0 0 :::873 :::* LISTEN 28631/rsync
[root@backup ~]# ps -ef|grep rsync
root 28631 1 0 21:30 ? 00:00:00 rsync --daemon
root 28647 28596 0 21:32 pts/0 00:00:00 grep rsync
[root@backup ~]# echo "/usr/bin/rsync --daemon" >>/etc/rc.local #加入开机自启动
[root@backup ~]# tail -1 /etc/rc.local
/usr/bin/rsync --daemon
四、Rsync客户端配置
[root@LAMP ~]# vi /etc/rsync.password
8700389
保存退出！
[root@LAMP ~]# cat /etc/rsync.password
8700389
[root@LAMP ~]# chmod 600 /etc/rsync.password
[root@LAMP ~]# ll /etc/rsync.password
-rw------- 1 root root 8 Jul 30 22:15 /etc/rsync.password
[root@LAMP ~]# mkdir /cc
[root@LAMP ~]# useradd rsync -s /sbin/nologin
[root@LAMP ~]# chown -R rsync.rsync /cc
[root@LAMP ~]# which rsync
/usr/bin/rsync
[root@LAMP ~]# rz -y
rz waiting to receive.
zmodem trl+C
100% 4686 KB 4686 KB/s 00:00:01 0 Errors.
[root@LAMP ~]# ll
-rw-r--r-- 1 root root 727290 Oct 26 2011 sersync2.5.4_64bit_binary_stable_final.tar.gz
[root@LAMP ~]# tar xf sersync2.5.4_64bit_binary_stable_final.tar.gz
[root@LAMP ~]# ll
drwxr-xr-x 2 root root 4096 Oct 26 2011 GNU-Linux-x86
[root@LAMP ~]# mv GNU-Linux-x86 /usr/local/sersync
[root@LAMP ~]# cd /usr/local/sersync
[root@LAMP ~]# ll
total 1772
-rwxr-xr-x 1 root root 2214 Oct 26 2011 confxml.xml
-rwxr-xr-x 1 root root 1810128 Oct 26 2011 sersync2
[root@LAMP ~]# cp confxml.xml confxml.xml-bak
[root@LAMP ~]# vi confxml.xml
"confxml.xml" 67L, 2267C written
:wq! #保存退出
参数说明：
1）修改24-28行，定义同步的本地目录及远程目标服务器IP和模块名
24
25
26
27
28
修改后内容为：
24
25
26
2) 修改29-35行，认证部分：
29
30
31
32
33
34
35
修改后的内容：
32
33
34
35
36
37
38
3）修改36-37行，定义同步队列或事件失败后，再次同步失败队列或事件的时间间隔
36
37
修改后的内容为：
39
40
以上修改完了，配置sersync环境变量:
[root@LAMP ~]# echo "export PATH=$PATH:/usr/local/sersync/bin" >>/etc/profile
[root@LAMP ~]# tail -1 /etc/profile
export PATH=$PATH:/usr/local/sersync/bin
[root@LAMP ~]# source /etc/profile
[root@LAMP ~]# echo "/usr/local/sersync/sersync2 -d -r -o /usr/local/sersync/confxml.xml" >>/etc/rc.local #加入开机自启动
[root@LAMP ~]# cat /etc/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
/usr/local/sersync/sersync2 -d -r -o /usr/local/sersync/confxml.xml
[root@LAMP ~]# mkdir /server/scripts -p
[root@LAMP ~]# cd /server/scripts
[root@LAMP ~]# vi check_sersync.sh
#!/bin/sh
sersync="/usr/local/sersync/sersync2"
confxml="/usr/local/sersync/confxml.xml"
status=$(ps aux |grep 'sersync2'|grep -v 'grep'|wc -l)
if [ $status -eq 0 ];
then
$sersync -d -r -o $confxml &
else
exit 0;
fi
:wq! #保存退出
[root@LAMP ~]# chmod +x check_sersync.sh
[root@LAMP ~]# ll
total 4
-rwxr-xr-x 1 root root 224 Aug 4 23:27 check_sersync.sh
[root@LAMP ~]# crontab －e #加入定时任务
*/5 * * * * root /server/scripts/check_sersync.sh > /dev/null 2>&1 #每隔5分钟执行一次脚本
[root@LAMP ~]# sh check_sersync.sh
set the system param
execute：echo 50000000 > /proc/sys/fs/inotify/max_user_watches
execute：echo 327679 > /proc/sys/fs/inotify/max_queued_events
parse the command param
option: -d run as a daemon
option: -r rsync all the local files to the remote servers before the sersync work
option: -o config xml name： /usr/local/sersync/confxml.xml
daemon thread num: 10
parse xml config file
host ip : localhost host port: 8008
daemon start，sersync run behind the console
Start the crontab Every 600 minutes rsync all the files to the remote servers entirely
use rsync password-file :
user is rsync_backup
passwordfile is /etc/rsync.password
config xml parse success
please set /etc/rsyncd.conf max connections=0 Manually
sersync working thread 12 = 1(primary thread) + 1(fail retry thread) + 10(daemon sub threads)
Max threads numbers is: 32 = 12(Thread pool nums) + 20(Sub threads)
please according your cpu ，use -n param to adjust the cpu rate
------------------------------------------
rsync the directory recursivly to the remote servers once
working please wait...
execute command: cd /cc && rsync -artuz -R --delete ./ [email protected]::cc --password-file=/etc/rsync.password >/dev/null 2>&1
run the sersync:
watch path is: /cc
[root@LAMP ~]# touch /cc/bb{1..500}.log
[root@LAMP ~]# ls
bb140.log bb230.log bb320.log bb410.log bb500.log
bb141.log bb231.log bb321.log bb411.log bb50.log
bb142.log bb232.log bb322.log bb412.log bb51.log
bb143.log bb233.log bb323.log bb413.log bb52.log
bb144.log bb234.log bb324.log bb414.log bb53.log
bb145.log bb235.log bb325.log bb415.log bb54.log
bb146.log bb236.log bb326.log bb416.log bb55.log
bb147.log bb237.log bb327.log bb417.log bb56.log
bb148.log bb238.log bb328.log bb418.log bb57.log
bb149.log bb239.log bb329.log bb419.log bb58.log
bb14.log bb23.log bb32.log bb41.log bb59.log
现在再到Rsync服务端查看/cc目录：
[root@backup ~]# ls /cc
bb140.log bb230.log bb320.log bb410.log bb500.log
bb141.log bb231.log bb321.log bb411.log bb50.log
bb142.log bb232.log bb322.log bb412.log bb51.log
bb143.log bb233.log bb323.log bb413.log bb52.log
bb144.log bb234.log bb324.log bb414.log bb53.log
bb145.log bb235.log bb325.log bb415.log bb54.log
bb146.log bb236.log bb326.log bb416.log bb55.log
bb147.log bb237.log bb327.log bb417.log bb56.log
bb148.log bb238.log bb328.log bb418.log bb57.log
bb149.log bb239.log bb329.log bb419.log bb58.log
bb14.log bb23.log bb32.log bb41.log bb59.log
以上测试都通过，说明inotify实时触发rsync同步脚本运行正常。
至此,Rsync+sersync实现数据实时同步完成,如有遗漏之处，还请广大博友拍砖指正！