CentOSでMySQL5.5いれてマルチマスターレプリケーション組むまで ref: http://qiita.com/srockstyle/items/8bed9550be75bf2e5e14

file0.txt

## EpelとRemiを入れる
rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

file1.txt

## MySQLの5.5をremiから
yum --enablerepo=remi install mysql-server mysql mysql-libs mysql-devel

file5.txt

CHANGE MASTER TO
MASTER_HOST = '{MASTERHOSTNAME}', 
MASTER_USER = '{MASTERUSERNAME}', 
MASTER_PASSWORD = '{MASTERPASSWORD}'
MASTER_PORT={CONNECTPORT};

file6.txt

## スレーブユーザの登録
GRANT REPLICATION SLAVE ON *.* TO 'slave-user'@'%' IDENTIFIED BY 'slave-password';

## マスターの指定
CHANGE MASTER TO MASTER_HOST = '[IPADDRESS]', MASTER_USER = '[USER]', MASTER_PASSWORD = '[PASSWORD]',MASTER_PORT=3306;

## スレーブの開始
start slave;

my.cnf

master-host= [もう一台のサーバのIP]
master-port=3306
master-user=[スレーブ用のユーザ]
master-password=[パスワード]