rsync+sersync

Environmental introduction

System Kernel  : 2.6.-642.4..el6.x86_64
Source Server  : 192.168.7.1
Target Server  : 192.168.7.10

Target Server Configure

1、Close SElinux

sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
setenforce

2、configure iptables server

iptables -A INPUT -p tcp --dport  -j ACCEPT
iptables -A OUTPUT -p tcp --sport  -j ACCEPT
/etc/init.d/iptables save
/etc/init.d/iptables restart

3、Install Rsync server software

yum -y install rsync xinetd
sed -n s/"disable.*= yes"/"disable         = no"/p /etc/xinetd.d/rsync
sed -n 's/server_args.* = --daemon/server_args     = --daemon --config=\/etc\/rsyncd.conf/p'  /etc/xinetd.d/rsync
/etc/init.d/xinetd start

4、Create rsync configuration file and configure

touch /etc/rsyncd.conf
cat >> /etc/rsyncd.conf << END
log file = /var/log/rsyncd/rsyncd.log
pidfile = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
secrets file = /etc/rsync.pass
motd file = /etc/rsyncd.Motd
[vick1]
path = /home/vick1
comment = vick1
uid = root
pid = root
port
use chroot = no
read only = no
list = no
max connections =
timeout =
auth users = vick
hosts allow = 192.168.7.1
END

5、Create user authentication file

touch /etc/rsync.pass
echo "vick:123456" >> /etc/rsync.pass

6、Set files permissions

chmod  /etc/rsync.pass
chmod  /etc/rsyncd.conf

7、start-up rsync

/etc/init.d/xinetd start

Source server rsync client configure

1、Close SElinux

sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
setenforce 0

2、configure iptables server

iptables -A INPUT -p tcp --dport  -j ACCEPT
iptables -A OUTPUT -p tcp --sport  -j ACCEPT
/etc/init.d/iptables save
/etc/init.d/iptables restart

3、Install Rsync server software

yum -y install rsync xinetd
sed -n s/"disable.*= yes"/"disable         = no"/p /etc/xinetd.d/rsync
/etc/init.d/xinetd start

4、create password file

touch /etc/sync.pass
echo "" >> /etc/sync.pass
chmod  /etc/sync.pass

5、Test single point synchronization

rsync -avH --port=873 --progress --delete  /home/vick1/  vick@192.168.7.10::vick1 --password-file=/etc/sync.pass

Install sersync tools real time trigger Rsync synchronization
1、Check whether the server kernel supports inotify

-rw-r--r-- 1 root root 0 May  2 14:33 max_queued_events
-rw-r--r-- 1 root root 0 May  2 14:33 max_user_instances
-rw-r--r-- 1 root root 0 May  2 14:33 max_user_watches

Notes: Make a list of three documents that show the kernel supports inotify

2、 Modify kernel parameters

cat >> /etc/sysctl.conf << END
fs.inotify.max_queued_events=
fs.inotify.max_user_watches=
fs.inotify.max_user_instances=
END

sysctl -p

Notes:
Max_queued_events:inotify queue maximum length, if the value is too small, there will be * * * Event Overflow * * error, 
resulting in inaccurate monitoring files Queue
max_user_watches：The number of files to synchronize，can use find /home/vick1 -type d|wc -l statistics, 
must ensure that the max_user_watches value is greater than the statistical results
max_user_instances:Create maximum value of inotify instance for each user

 3、Install and configure sersync services

Download sersync software
wget https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/sersync/sersync2.5.4_64bit_binary_stable_final.tar.gz --no-check-certificate
tar -zxvf    sersync2..4_64bit_binary_stable_final.tar.gz
mv GNU-Linux-x86 /usr/local/sersync

　　Configure sersync services

Configure an instance and specify a synchronization directory,user and password

cp /usr/local/sersync/confxml.xml /usr/local/sersync/confxml.xml.bak 
vim /usr/local/sersync/confxml.xml
 
<?xml version="1.0" encoding="ISO-8859-1"?>
<head version="2.5">
    <host hostip="localhost" port=""></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="false"/>
    <modify start="false"/>
    </inotify>
 
    <sersync>
    <localpath watch="/home/vick1">
        <remote ip="192.168.7.10" name="vick1"/>
        <!--<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="vick" passwordfile="/etc/sync.pass"/>
        <userDefinedPort start="false" port=""/><!-- port= -->
        <timeout start="true" time=""/><!-- timeout= -->
        <ssh start="false"/>
    </rsync>
    <failLog path="/usr/local/sersync/logs/rsync_fail_log.sh" timeToExecute=""/><!--default every 60mins execute once-->
    <crontab start="false" schedule=""><!--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=""/>
    </localpath>
    </plugin>
    <plugin name="refreshCDN">
    <localpath watch="/data0/htdocs/cms.xoyo.com/site/">
        <cdninfo domainname="ccms.chinacache.com" port="" 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>
 
/usr/local/sersync/sersync2 -d -r -o  /usr/local/sersync/confxml.xml

　　The final test is successful synchronization，The configuration is over here

Extand：
Add script to monitor whether sersync is running properly

touch /home/script/chech_sersync.sh
 
cat >> /home/script/chech_sersync.sh << END
#!/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  ];
 
then
 
$sersync -d -r -o $confxml &
 
else
 
exit ;
 
fi
END

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