server作为备份服务器，rsyncd，客户端client使用工具连接
rsync 的服务端配置（rsyncd.conf）仅对服务器端的 rsyncd 服务 生效，必须在服务器端重启服务才能加载新配置。客户端的 rsyncd 服务与当前连接的服务器端无关，重启客户端服务既不会让服务器端配置生效，也不影响客户端用rsync命令发起连接（客户端只需安装 rsync 工具，无需运行 rsyncd 服务）。
改服务端配置，就重启服务端的 rsyncd；客户端不需要运行 rsyncd 服务，也不用重启。
#安装软件包
[root@server ~ 10:14:10]# yum install -y rsync
# 准备同步目录，该目录任何用户都可以读写。
[root@server ~ 08:43:26]# mkdir -m 777 /backup
# 配置rsync，不验证用户，直接同步
[root@server ~ 10:11:06]# vim /etc/rsyncd.conf
#vim添加命令行
# 添加如下配置
[backup]
# 描述信息
comment = backup
# 备份路径
path = /backup
# 设置可写
read only = no
# 指定用户名
auth users = rsync
# 指定用户密码文件
secrets file = /etc/rsyncd.secrets
#编辑root权限
[root@server ~ 10:26:58]# vim /etc/rsyncd.conf
uid=root
gid=root
#重启
[root@server ~ 10:29:23]# systemctl restart rsyncd --now
# 创建用户凭据文件
[root@server ~ 10:13:16]# echo 'rsync:redhat' > /etc/rsyncd.secrets
[root@server ~ 10:13:35]# chmod 400 /etc/rsyncd.secrets
# 启用并启动rsyncd服务
[root@server ~ 10:13:43]# systemctl enable rsyncd --now
Created symlink from /etc/systemd/system/multi-user.target.wants/rsyncd.service to /usr/lib/systemd/system/rsyncd.service.
# 配置防火墙
[root@server ~ 10:13:50]# firewall-cmd --add-service=rsyncd
success
[root@server ~ 10:14:01]# firewall-cmd --add-service=rsyncd --permanent
success
#关闭seLinux
[root@server ~ 10:28:59]# setenforce 0客户端配置和测试
# 准备密码文件
[root@client ~ 09:21:27]# echo redhat > rsyncd.secrets
[root@client ~ 10:20:48]# chmod 400 rsyncd.secrets
# 传输测试
[root@client ~ 10:30:04]# rsync -av --password-file=./rsyncd.secrets /etc/hostname rsync@server::backup
sending incremental file list
hostname
sent 110 bytes received 35 bytes 290.00 bytes/sec
total size is 17 speedup is 0.12
# 验证结果
[root@server ~ 10:32:35]# ls /backup/
hostname
安装软件包
# 下载软件
[root@client ~]# wget https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/sersync/sersync2.5.4_64bit_binary_stable_final.tar.gz
#或者将sersync2.5.4_64bit_binary_stable_final.tar.gz拖入窗口安装
[root@client ~ 10:41:09]# rz -E
rz waiting to receive.
# 解压文件
[root@client ~ 10:54:48]# tar xf sersync2.5.4_64bit_binary_stable_final.t配置文件
[root@client ~ 10:57:18]# vim confxml.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<head version="2.5">
<host hostip="localhost" port="8008"></host>
<debug start="false"/>
<fileSystem xfs="true"/>
<filter start="true">
<exclude expression="^cache/*"></exclude>
</filter>
<inotify>
<delete start="true"/>
<createFolder start="true"/>
<createFile start="false"/>
<closeWrite start="true"/>
<moveFrom start="true"/>
<moveTo start="true"/>
<attrib start="false"/>
<modify start="false"/>
</inotify>
<sersync>
<localpath watch="/app_data">
<remote ip="10.1.8.10" name="backup"/>
</localpath>
<rsync>
<commonParams params="-azP"/>
<auth start="true" users="rsync" passwordfile="/root/rsyncd.secrets"/>
<userDefinedPort start="false" port="873"/>
<timeout start="false" time="100"/>
<ssh start="false"/>
</rsync>
<failLog path="/tmp/rsync_fail_log.sh" timeToExecute="60"/>
<crontab start="false" schedule="600"><!--600mins-->
<crontabfilter start="false">
<exclude expression="*.php"></exclude>
<exclude expression="info/*"></exclude>
</crontabfilter>
</crontab>
<plugin start="false" name="command"/>
</sersync>
<plugin name="command">
<param prefix="/bin/sh" suffix="" ignoreError="true"/>
<filter start="false">
<include expression="(.*)\.php"/>
<include expression="(.*)\.sh"/>
</filter>
</plugin>
</head>运行Sersync
[root@client ~ 11:01:20]# cp GNU-Linux-x86/sersync2 /usr/local/bin/
[root@client ~ 11:02:24]# sersync2 -h
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
_______________________________________________________
参数-d:启用守护进程模式
参数-r:在监控前，将监控目录与远程主机用rsync命令推送一遍
c参数-n: 指定开启守护线程的数量，默认为10个
参数-o:指定配置文件，默认使用confxml.xml文件
参数-m:单独启用其他模块，使用 -m refreshCDN 开启刷新CDN模块
参数-m:单独启用其他模块，使用 -m socket 开启socket模块
参数-m:单独启用其他模块，使用 -m http 开启http模块
不加-m参数，则默认执行同步程序
_____________________________________________________________
# 运行 Sersync，-d 后台运行
[root@client ~ 11:02:35]# sersync2 -o confxml.xml -d
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: -o config xml name： confxml.xml
option: -d run as a daemon
daemon thread num: 10
parse xml config file
host ip : localhost host port: 8008
now the filter work ,if you set the crontab,you have to set crontab filter
WARNING XFS FILE SYSTEM WORK
daemon start，sersync run behind the console
use rsync password-file :
user is rsync
passwordfile is /root/rsyncd.secrets
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: 22 = 12(Thread pool nums) + 10(Sub threads)
please according your cpu ，use -n param to adjust the cpu rate
run the sersync:
watch path is: /app_data测试文件实时同步
# server 端监控目录 /backup
[root@server ~ 10:41:27]# watch -n 1 ls /backup
#在客户端创建文件和目录
[root@client ~ 11:03:42]# echo hello world > /app_data/welcome.txt
[root@client ~ 11:04:22]# mkdir /app_data/dbdata
# 客户端删除文件
[root@client ~ 11:04:37]# rm -fr /app_data/* [root@client ~ 11:04:55]# cp confxml.xml /etc/sersyncd.conf
[root@client ~ 11:23:24]# vim /etc/systemd/system/sersyncd.service
[Unit]
Description=SerSync server daemon
[Service]
Type=forking
ExecStart=/usr/local/bin/sersync2 -o /etc/sersyncd.conf -d
[Install]
WantedBy=multi-user.target
[root@client ~ 11:24:22]# systemctl daemon-reload
[root@client ~ 11:24:27]# systemctl enable sersyncd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/sersyncd.service to /etc/systemd/system/sersyncd.service.