MySQL实现主从复制

1.主服务器配置

设置复制主配置

vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin
server-id=1

创建用于复制的用户

mysql> CREATE USER 'repl'@'%.example.com' IDENTIFIED BY 'password';
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%.example.com';

获取复制主二进制日志坐标

mysql > SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 73       | test         | manual,mysql     |
+------------------+----------+--------------+------------------+

选择数据快照的方法

使用mysqldump创建数据快照
mysqldump --all-databases --master-data > dbdump.db

重启mysql

service mysqld restart

2.设置复制从站

设置复制从站配置

[mysqld]
server-id=2

在从设备上设置主配置

mysql> CHANGE MASTER TO
    ->     MASTER_HOST='master_host_name',
    ->     MASTER_USER='replication_user_name',
    ->     MASTER_PASSWORD='replication_password',
    ->     MASTER_LOG_FILE='recorded_log_file_name',
    ->     MASTER_LOG_POS=recorded_log_position;

设置新主服务器和从服务器之间的复制

mysql -h master < fulldb.dump

将从站添加到复制环境

mysql> STOP SLAVE;
mysql> SHOW SLAVE STATUS\G
START SLAVE;
mysql> SHOW SLAVE STATUS\G

参考连接：link