mysql主從同步配置

主host:www IP:192.168.9.124
從host:www1 IP:192.168.9.123


#下載mysql
wget http://dev.mysql.com/get/Downloads/MySQL-5.1/mysql-5.1.58-linux-i686-glibc23.tar.gz/from/ftp://mirror.anl.gov/pub/mysql/

#安裝mysql
tar xzf mysql-5.1.58-linux-i686-glibc23.tar.gz
useradd mysql
mv mysql-5.1.58-linux-i686-glibc23 /usr/local/mysql

chown -R root .
chown -R mysql data
cp support-files/my-medium.cnf /etc/my.cnf
bin/mysqld_safe –user=mysql &
cp support-files/mysql.server /etc/init.d/mysql.server
cd

export PATH=$PATH:/usr/local/mysql/bin/ # 加入環境變量

 

分別更改主從root密碼
# mysql
mysql>update mysql.user set password=password('123456') where user="root" and host="localhost";

www:
mysql> grant all privileges  on *.* to root@192.168.9.123 identified by '123456';   #授權192.168.9.123 登陸mysql
mysql> flush privileges;     #刷新權限表
mysql> exit;

在從服務器測試
www1
# mysql -u root -h 192.168.9.124 -p


www
mysql> FLUSH TABLES WITH READ LOCK;  (主庫加鎖)
記錄日志和偏移量
mysql> show master status ;
mysqldump -p –all-database –lock-all-tables >db.sql


www1
scp -P root@192.168.9.124:/root/db.sql .

#########  修改從my.cnf ############
server-id=2
master-host=192.168.9.124
master-user=slave
master-password=123456
master-port=3306
log-bin=mysql-bin
———————————–
重啟mysql
lsof -i:3306 |xargs kill -9
/usr/local/mysql/bin/mysqld_safe –user=mysql &


mysql -p < db.sql    # 導入db.mysql

 

www


mysql>unlock tables ;   (主庫解鎖)

mysql>show master status ;


www1

mysql> slave stop;

mysql> CHANGE MASTER TO MASTER_HOST='192.168.9.124', MASTER_USER='root',

MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=548;  (後面log_file log_pos 參照主庫的日志名稱和偏移量)

mysql>  slave start ;

查狀態

mysql> show master status;

mysql> show slave status;

mysql> show processlist ;

 


www

-A INPUT -s 192.168.9.123 -p tcp –dport 3306 -j ACCEPT 放行192.168.9.123連接3306端口

-A INPUT -p tcp –dport 22 -j ACCEPT #允許ssh

-A INPUT -j DROP  #拒絕所有
作者 “xavier”

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