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sersync 实现实时数据同步

互联网 diligentman 2小时前 3次浏览

sersync 介绍

sersync类似于inotify,同样用于监控,但它克服了inotify的缺点.

inotify最大的不足是会产生重复事件,或者同一个目录下多个文件的操作会产生多个事件,例如,当监
控目录中有5个文件时,删除目录时会产生6个监控事件,从而导致重复调用rsync命令。另外比如:vim
文件时,inotify会监控到临时文件的事件,但这些事件相对于rsync来说是不应该被监控的

sersync 优点:

sersync是使用c++编写,而且对linux系统文件系统产生的临时文件和重复的文件操作进行过滤,
所以在结合rsync同步的时候,节省了运行时耗和网络资源。因此更快。
sersync配置很简单,其中提供了静态编译好的二进制文件和xml配置文件,直接使用即可
sersync使用多线程进行同步,尤其在同步较大文件时,能够保证多个服务器实时保持同步状态
sersync有出错处理机制,通过失败队列对出错的文件重新同步,如果仍旧失败,则按设定时长对
同步失败的文件重新同步
sersync不仅可以实现实时同步,另外还自带crontab功能,只需在xml配置文件中开启,即也可以
按要求隔一段时间整体同步一次,而无需再额外配置crontab功能
sersync 可以二次开发

sersync项目地址: https://code.google.com/archive/p/sersync/
sersync下载地址:https://code.google.com/archive/p/sersync/downloads

案例:基于rsync daemon 实现 sersync

#在数据服务器上下载sersync,并拷贝至相应的目录,设置PATH变量
[root@sz-kx-centos8 ~]# wget https://raw.githubusercontent.com/orangle/sersync/master/release/sersync2.5.4_64bit_binary_stable_final.tar.gz

# 解压
[root@sz-kx-centos8 ~]# tar xf sersync2.5.4_64bit_binary_stable_final.tar.gz
[root@sz-kx-centos8 ~]# cp -a GNU-Linux-x86 /usr/local/sersync

[root@sz-kx-centos8 ~]# echo 'PATH=/usr/local/sersync:$PATH' > /etc/profile.d/sersync.sh
[root@sz-kx-centos8 ~]# source /etc/profile.d/sersync.sh

[root@sz-kx-centos8 ~]# ll /usr/local/sersync/
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

#确认安装rsync客户端工具
[root@sz-kx-centos8 ~]# rpm -q rsync &> /dev/null || dnf -y install rsync

#备份sersync配置文件
[root@sz-kx-centos8 ~]# cp /usr/local/sersync/confxml.xml{,.bak}

#修改sersync配置文件
[20:47:13 root@sz-kx-centos8 ~]# cat /usr/local/sersync/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="false"/>
    <filter start="false">
	<exclude expression="(.*).svn"></exclude>
	<exclude expression="(.*).gz"></exclude>
	<exclude expression="^info/*"></exclude>
	<exclude expression="^static/*"></exclude>
    </filter>
    <inotify>
	<delete start="true"/>
	<createFolder start="true"/>
	<createFile start="false"/>
	<closeWrite start="true"/>
	<moveFrom start="true"/>
	<moveTo start="true"/>
	<attrib start="true"/>   #修改此行为true,文件属性变化后也会同步
	<modify start="false"/>
    </inotify>

    <sersync>
	<localpath watch="/data/www">  #修改此行,需要同步的源目录或文件,建议同步目录
	    <remote ip="备份服务器IP" name="backup"/>  #修改此行,指定备份服务器地址和rsync daemon的模块名,如果下面开启了ssh start,此时name为远程shell方式运行时的目标目录
	    <!--<remote ip="192.168.8.39" name="tongbu"/>-->
	    <!--<remote ip="192.168.8.40" name="tongbu"/>-->
	</localpath>
	<rsync>
	    <commonParams params="-artuz"/>
	    <auth start="true" users="rsyncuser" passwordfile="/etc/rsync.pas"/>  #修
改此行为true,指定备份服务器的rsync配置的用户和密码文件
	    <userDefinedPort start="false" port="874"/><!-- port=874 -->
	    <timeout start="false" time="100"/><!-- timeout=100 -->
	    <ssh start="false"/>
	</rsync>
	<failLog path="/tmp/rsync_fail_log.sh" timeToExecute="60"/><!--default every 60mins execute once-->
	<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"/>	<!--prefix /opt/tongbu/mmm.sh suffix-->
	<filter start="false">
	    <include expression="(.*).php"/>
	    <include expression="(.*).sh"/>
	</filter>
    </plugin>

    <plugin name="socket">
	<localpath watch="/opt/tongbu">
	    <deshost ip="192.168.138.20" port="8009"/>
	</localpath>
    </plugin>
    <plugin name="refreshCDN">
	<localpath watch="/data0/htdocs/cms.xoyo.com/site/">
	    <cdninfo domainname="ccms.chinacache.com" port="80" username="xxxx" passwd="xxxx"/>
	    <sendurl base="http://pic.xoyo.com/cms"/>
	    <regexurl regex="false" match="cms.xoyo.com/site([/a-zA-Z0-9]*).xoyo.com/images"/>
	</localpath>
    </plugin>
</head>


#创建连接rsynd服务器的用户密码文件,并必须修改权限
[root@sz-kx-centos8 ~]# echo centos > /etc/rsync.pas
[root@sz-kx-centos8 ~]# chmod 600 /etc/rsync.pas

#查看帮助
[root@sz-kx-centos8 ~]# 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,默认使用当前工作目录下的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
_______________________________________________________
#以后台方式执行同步
[root@sz-kx-centos8 ~]# sersync2 -dro /usr/local/sersync/confxml.xml

#如果同步失败,可以手动执行下面命令,观察过程
[root@sz-kx-centos8 ~]# cd /data/www && rsync -artuz -R --delete ./ rsyncuser@backup-server::backup --password-file=/etc/rsync.pas >/dev/null 2>&1
run the sersync:
watch path is: /data/www

#sersync支持多实例,也即监控多个目录时,只需分别配置不同配置文件,然后使用sersync2指定对应配置
文件运行
[root@sz-kx-centos8 ~]# sersync2 -rd -o /etc/sersync.d/nginx.xml

基于远程shell 实现 sersync

#不需要配置rsync daemon,只需要配置基于key验证的ssh即可
[root@sz-kx-centos8 ~]# ssh-keygen
[root@sz-kx-centos8 ~]# ssh-copy-id backup-server
#下载sersync,并拷贝至相应的目录,设置PATH变量同5.5.2
#修改sersync配置文件
[root@sz-kx-centos8 ~]# cat /usr/local/sersync/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="false"/>
    <filter start="false">
    <exclude expression="(.*).svn"></exclude>
    <exclude expression="(.*).gz"></exclude>
    <exclude expression="^info/*"></exclude>
    <exclude expression="^static/*"></exclude>
    </filter>
    <inotify>
    <delete start="true"/>
    <createFolder start="true"/>
    <createFile start="false"/>
    <closeWrite start="true"/>
    <moveFrom start="true"/>
    <moveTo start="true"/>
    <attrib start="true"/> #修改此行为true
    <modify start="false"/>
    </inotify>
    <sersync>
    <localpath watch="/data/www"> #修改此行,指定源数据目录
        <remote ip="备份服务器IP" name="/data/backup"/> #修改此行指定备份服务器地址和备份目标目录
        <!--<remote ip="192.168.8.39" name="tongbu"/>-->
        <!--<remote ip="192.168.8.40" name="tongbu"/>-->
    </localpath>
    <rsync>
        <commonParams params="-artuz"/>
        <auth start="false" users="root" passwordfile="/etc/rsync.pas"/> #必须修改 此行,不启用认证start=false
        <userDefinedPort start="false" port="874"/><!-- port=874 -->
        <timeout start="false" time="100"/><!-- timeout=100 -->
        <ssh start="true"/> #修改此行为true,使用远程shell方式的rsync连接方式,无需在目标
主机上配置启动rsync daemon服务
#####################################以下行不需要修改
####################################
    </rsync>
    <failLog path="/tmp/rsync_fail_log.sh" timeToExecute="60"/><!--default every 60mins execute once-->
    <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>
#将中间的行可以删除
</head>

[root@sz-kx-centos8 ~]# sersync2 -dro /usr/local/sersync/confxml.xml
set the system param
execute:echo 50000000 > /proc/sys/fs/inotify/max_user_watches

案例 基于LAMP搭建web服务数据同步

sersync 实现实时数据同步

# 安装mysql做主从复制
[root@centos8 ~]# yum install mysql-server -y
[root@centos8 ~]# yum install mysql-server -y

开机启动mysql
[root@centos8 ~]# systemctl enable --now mysqld
[root@centos8 ~]# systemctl enable --now mysqld

配置主从
#主配置
[root@centos8 ~]# vim /etc/my.cnf
[mysqld]
server-id=28
log-bin=/data/mysql/mysql-bin

#创建目录并授权
[root@centos8 ~]# mkdir /data/mysql/ -p
[root@centos8 ~]# chown -R mysql.mysql /data/mysql

# 重新启动mysql服务
[root@centos8 ~]# systemctl restart mysqld

#从配置

[mysqld]
server_id=38
log-bin=/data/mysql/mysql-bin
read_only

#创建目录并授权
[root@centos8 ~]# mkdir /data/mysql/ -p
[root@centos8 ~]# chown -R mysql.mysql /data/mysql/

# 重新启动mysql服务
[root@centos8 ~]# systemctl restart mysqld

主进入数据库创建库并创建用户还有授权
mysql> create database db1;
Query OK, 1 row affected (0.00 sec)

mysql> use db1;
Database changed
mysql> show master logs;
+------------------+-----------+-----------+
| Log_name         | File_size | Encrypted |
+------------------+-----------+-----------+
| mysql-bin.000002 |       156 | No        |
+------------------+-----------+-----------+
1 row in set (0.00 sec)

# 创建主从同步用户
mysql> create  user repluser@'172.31.0.%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> grant replication slave on *.* to repluser@'172.31.0.%';
Query OK, 0 rows affected (0.00 sec)

从配置
使用帮助
mysql> help change master to;

mysql> CHANGE MASTER TO
  MASTER_HOST='172.31.0.28',
  MASTER_USER='repluser',
  MASTER_PASSWORD='123456',
  MASTER_PORT=3306,
  MASTER_LOG_FILE='mysql-bin.000002',
  MASTER_LOG_POS=156;

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.31.0.28
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 1064
               Relay_Log_File: centos8-relay-bin.000002
                Relay_Log_Pos: 1232
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

# 创建WordPress库
mysql> create database wordpress;
Query OK, 1 row affected (0.00 sec)

# 创建WordPress用户
mysql> create user wordpress@'172.31.0.%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

# 授权
mysql> grant all on wordpress.* to wordpress@'172.31.0.%';
Query OK, 0 rows affected (0.00 sec)

创建目录NFS做数据同步
[root@sz-kx-centos8 ~]# mkdir /data/wordpress -p
[root@sz-kx-centos8 ~]# chmod 777 /data/wordpress/
[root@sz-kx-centos8 ~]# vim /etc/exports
/data/wordpress 172.31.0.0/16(rw)

# 安装NFS
[root@centos8 ~]# yum install -y nfs-utils
[root@centos8 ~]# yum install -y nfs-utils
# 开机启动
[root@sz-kx-centos8 ~]# systemctl enable --now nfs-server.service
[root@sz-kx-centos8 ~]# systemctl enable --now nfs-server.service

# 重读配置
[root@sz-kx-centos8 ~]# exportfs -r

# 查看本机所有NFS共享
[root@sz-kx-centos8 ~]# exportfs -v
/data/wordpress
		172.31.0.0/16(sync,wdelay,hide,no_subtree_check,sec=sys,rw,secure,root_squash,no_all_squash)

##安装web
[root@CentOS8 ~]# yum install httpd php-fpm php-json php-mysqlnd nfs-utils -y
[root@CentOS8 ~]# yum install httpd php-fpm php-json php-mysqlnd nfs-utils -y

# 开机启动
[root@localhost ~]# systemctl enable --now httpd php-fpm
[root@localhost ~]# systemctl enable --now httpd php-fpm

# 挂载
[root@localhost ~]# vim /etc/fstab
172.31.0.18:/data/wordpress/wp-content/uploads       /var/www/html/wp-content/uploads    nfs  _netdev 0 0

[root@localhost ~]# vim /etc/fstab
172.31.0.18:/data/wordpress/wp-content/uploads       /var/www/html/wp-content/uploads    nfs  _netdev 0 0

# 创建目录
[root@localhost ~]# mkdir /var/www/html/wp-content/uploads -p
[root@localhost ~]# mkdir /var/www/html/wp-content/uploads -p
[root@localhost ~]# mount -a
[root@localhost ~]# mount -a

# 查看能不能看远程主机的共享
[root@localhost ~]# showmount -e 172.31.0.18
Export list for 172.31.0.18:
/data/wordpress 172.31.0.0/16

# 授权改所属用户(在挂载的nfs主机改)
[root@sz-kx-centos8 /data/wordpress]# chown -R apache.apache /data/wordpress/*

数据同步(需要手动执行同步数据,很是不方便,所以使用以下的方法解决手动执行同步数据问题)
# master安装软件包
[root@sz-kx-centos8 ~]# yum -y install inotify-tools

# back机安装
[root@localhost ~]# yum install -y rsync rsync-daemon

# back机操作
[root@localhost ~]# rsync --daemon
[root@localhost ~]# ss -tanlp
State         Recv-Q         Send-Q                  Local Address:Port                    Peer Address:Port            
LISTEN        0              128                           0.0.0.0:873                          0.0.0.0:* 

# back机操作
[root@localhost ~]# vim /etc/rsyncd.conf
[backup]
path = /data/wordpress/
read only = no

# 测试master机操作
[root@sz-kx-centos8 ~]# rsync rsync://172.31.0.58
backup

# 在master机器手动执行同步
[root@sz-kx-centos8 ~]# echo "centos" > /etc/rsync.pas
[root@sz-kx-centos8 ~]# chmod 600 /etc/rsync.pas

先把数据手工推送到back机器
[root@sz-kx-centos8 ~]# rsync /data/wordpress/ rsync://172.31.0.58::backup

[root@sz-kx-centos8 ~]# rsync -avz --delete --password-file=/etc/rsync.pas /data/wordpress rsyncuser@172.31.0.18::backup

推荐使用这个方式同步数据
sersync 实现实时数据同步
[root@sz-kx-centos8 ~]# wget https://raw.githubusercontent.com/orangle/sersync/master/release/sersync2.5.4_64bit_binary_stable_final.tar.gz

改配置文件按照上面的改即可

# 以后台方式执行同步
[root@sz-kx-centos8 ~]# sersync2 -dro /usr/local/sersync/confxml.xml
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 
use rsync password-file :
user is	rsyncuser
passwordfile is 	/etc/rsync.pas
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
------------------------------------------
rsync the directory recursivly to the remote servers once
working please wait...
execute command: cd /data/wordpress && rsync -artuz -R --delete ./ rsyncuser@172.31.0.58::backup --password-file=/etc/rsync.pas >/dev/null 2>&1 
run the sersync: 
watch path is: /data/wordpress

# 如果同步失败,可以手动执行下面命令,观察过程
[root@sz-kx-centos8 ~]# cd /data/wordpress && rsync -artuz -R --delete ./ rsyncuser@172.31.0.58::backup --password-file=/etc/rsync.pas >/dev/null 2>&1

浏览器同步数据(也可以改成域名解析ip访问)

sersync 实现实时数据同步

sersync 实现实时数据同步

遇到报错

[root@sz-kx-centos8 ~]# rsync rsync://172.31.0.58
rsync: failed to connect to 172.31.0.58 (172.31.0.58): No route to host (113)
rsync error: error in socket IO (code 10) at clientserver.c(127) [Receiver=3.1.3]

解决方法:使用[root@sz-kx-centos8 ~]# telnet 172.31.0.58 873
看通不通,如果不通可能是防火墙没有关闭,关闭即可重新同步


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