MySQL主从同步
所采用的mysql数据库是rpm包方式安装
1. Master:修改/etc/my.cnf文件[mysqld]
[mysqld]
server-id = 1
log-bin
innodb_flush_log_at_trx_commit=1
sync_binlog=1
datadir=/var/lib/mysql
2. Slave:修改/etc/my.cnf文件[mysqld]
[mysqld]
server-id=2
datadir=/var/lib/mysql
3. Master:在master数据库设置用来同步的slave用户权限
GRANT REPLICATION SLAVE ON *.*
TO '<slave_username>'@'<slave_ip>'
IDENTIFIED BY '<slave_password>';
例: grant replication slave on *.* to 'repl'@'192.168.1.2' identified by '123456';
4.Master上锁表：flush tables with read lock；
解锁：unlock tables；
5. Master数据导到slave
打包/var/lib/mysql目录，然后scp拷贝到从库上，覆盖从库/var/lib/mysql目录
6. Master查看日志节点和Position信息
查看主库信息获得日志文件以及position
mysql> show master status;
+------------------+------------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+------------+--------------+------------------+
| mysql-bin.000596 | 1050931156 | | |
+------------------+------------+--------------+------------------+
7.从库同步
mysql>STOP SLAVE；
mysql>CHANGE MASTER TO
>MASTER_HOST='<master_host>',
>MASTER_USER='<slave_username>',
>MASTER_PASSWORD='<slave_password>',
>MASTER_LOG_FILE='<see xtrabackup_binlog_info>',
>MASTER_LOG_POS=<see xtrabackup_binlog_info>;
mysql>START SLAVE;
执行完上述命令后
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.2
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000596
Read_Master_Log_Pos: 1036007396
Relay_Log_File: localhost-relay-bin.000221
Relay_Log_Pos: 1036007533
Relay_Master_Log_File: mysql-bin.000596
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 1036007396
Relay_Log_Space: 1036007533
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
1 row in set (0.00 sec)