CSYNC双向同步


 

该服务所需软件包下载地址

ftp://ftp.gnutls.org/pub/gnutls/libtasn1/libtasn1-2.1.tar.gz

http://www.sqlite.org/sqlite-2.8.17.tar.gz

http://internode.dl.sourceforge.net/sourceforge/librsync/librsync-0.9.7.tar.gz

ftp://ftp.gnu.org/pub/gnu/gnutls/gnutls-2.6.6.tar.bz2

http://oss.linbit.com/csync2/csync2-1.34.tar.gz

http://jaist.dl.sourceforge.net/sourceforge/inotify-tools/inotify-tools-3.13.tar.gz


主机：

server11 192.168.0.111

host11 192.168.0.210


 

1.安装软件 (以下步骤在每台主机上操作)

yum install gcc gcc-c++ libgpg-error libgpg-error-devel libgcrypt libgcrypt-devel -y


 

tar zxf libtasn1-2.1.tar.gz

cd libtasn1-2.1

./configure && make && make install


 

tar zxf sqlite-2.8.17.tar.gz

cd sqlite-2.8.17

./configure && make && make install


 

tar zxf librsync-0.9.7.tar.gz

cd librsync-0.9.7

./configure && make && make install


 

tar jxf gnutls-2.6.6.tar.bz2

cd gnutls-2.6.6

./configure && make && make install


 

echo "/usr/local/lib" >> /etc/ld.so.conf

ldconfig


 

tar zxf inotify-tools-3.13.tar.gz

inotify-tools-3.13

./configure && make && make install


 

yum install byacc flex -y


 

tar zxf csync2-1.34.tar.gz

cd csync2-1.34

./configure && make && make install

make cert


 

csync2 -k /etc/csync2.key

scp /etc/csync2.key root@192.168.0.210:/etc (host11上不用重新创建key)


 

2. 配置csync2

yum install xinetd -y

vim /etc/xinetd.d/csync2

service csync2

{

disable = no

protocol = tcp

flags = REUSE

socket_type = stream

wait = no

user = root

group = root


 

server = /usr/local/sbin/csync2

server_args = -i

}


 


 

vim /etc/services

csync2 30865/tcp


 

mkdir /var/csync2


 

vim /etc/csync2.cfg


 


 

# Csync2 Example Configuration File

# ---------------------------------

#

# Please read the documentation:

# http://oss.linbit.com/csync2/paper.pdf

group mygroup

{

host server11.example.com host11.example.com; (每台主机完整的主机名,配置另一台机器时反过来写)

# host host4@host4-eth2;

#

key /etc/csync2.key;

#

include /www; 需要同步的目录

# include %homedir%/bob;

# exclude %homedir%/bob/temp;

exclude *~ .*; 排除以 “.”开头的文件

##

action

# {

# pattern /etc/apache/httpd.conf;

# pattern /etc/apache/sites-available/*;

# exec "/usr/sbin/apache2ctl graceful";

# logfile "/var/log/csync2_action.log";

# do-local;

# }

#

backup-directory /var/csync2; 防错备份目录,根据自己的需求设置,每台主机上都要有

backup-generations 3;

#

auto younger; 同步以最新的文件为标准更新

}

#

# prefix homedir

# {

# on host[12]: /export/users;

# on *: /home;

# }

service xinetd start

chkconfig xinetd on


 

3>测试同步是否正常

在两台机器中的任一台创建或者删除一个文件，然后查看其它机器是否创建或删除。

如果遇到问题就用csync2 -xv命令手动调试并根据错误信息作调整。

注：csync2相关命令介绍

csync2 -vvv -T 测试csync配置是否正确，可以看到相关SQL执行过程.

csync2 -xv 执行同步命令

csync2 -xvvv 执行同步命令，并显示出详细的信息.


 

应该注意的问题.

缓存相关的目录尽量不要用csync2去处理，这个程序目录尽量交给NFS处理.

http://oss.linbit.com/csync2/paper.pdf