mysql主从复制操作步骤

注：

、做主从复制的两台服务器server-id不能相同

、主从的字符集要一样，不然数据导入会报错

、开启db01的log-bin功能
[root@db01 mysql]# vim /etc/my.cnf
log-bin=mysql-bin
[root@db01 ~]# /etc/init.d/mysqld restart
Shutting down MySQL. SUCCESS!
Starting MySQL.. SUCCESS!
、查看log_bin是否开启
mysql> show variables like "log_bin";
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_bin | ON |
+---------------+-------+
 row in set (0.00 sec)
、授权用户
mysql> grant replication slave on *.* to rep@";
mysql> flush privileges;
、同步前锁表（不能退出当前的窗口）
mysql> create database tang1234;    #创建一个表用于测试主从同步
Query OK,  row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
| yongzhen888 |
+--------------------+
 rows in set (0.00 sec)
mysql> flush tables with read lock;    #注意不能退出mysql的Shell页面，否则锁表失败
、记录位置点
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin. |  | | |
+------------------+----------+--------------+------------------+
 row in set (0.00 sec)
、使用mysqldump进行数据库备份
[root@db01 mysql]# mysqldump -uroot -p123456 --events -A -B | gzip >/opt/bak_$(date +%F).sql.gz
、解锁数据库（从库完成数据库恢复并开启slave模式）
mysql> unlock tables;

.恢复数据
mysql -uroot -poldboy456 -S /data//mysql.sock </server/backup/rep_bak_2015--.sql

.从库开始同步

CHANGE MASTER TO
MASTER_HOST='172.16.182.5',
MASTER_PORT=,
MASTER_USER='rep',
MASTER_PASSWORD=',
MASTER_LOG_FILE='mysql-bin.000003',
MASTER_LOG_POS=;

CHANGE MASTER TO MASTER_LOG_FILE=;

mysql> flush logs;
mysql> start slave;
mysql> show slave status\G;
*************************** . row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.3
Master_User: rep
Master_Port:
Connect_Retry:
Master_Log_File: mysql-bin.
Read_Master_Log_Pos:
Relay_Log_File: node3-relay-bin.
Relay_Log_Pos:
Relay_Master_Log_File: mysql-bin.
Slave_IO_Running: Yes
Slave_SQL_Running: Yes