MariaDB主从备份记录

一、预期效果：

　　环境： centos 6.5   mariadb 10.0.14 (mysql -V)

　　主服务器：192.168.5.206   从服务器：192.168.5.207   主服务器数据库有任何变动，从服务会跟着变动。

二、前期准备：

　　确保主从数据库数据一致。

  mysqldump -uroot -p 数据库名 > db.sql
  mysql -uroot -p 数据库名 < db.sql

三、配置：

　　1⃣️  主服务器：vi /etc/my.cnf.d/server.cnf   添加如下配置，确保log-bin文件存在，所属用户组与mysql一致并增加X权限。

# this is only for the mysqld standalone daemon
[mysqld]
log-bin=/var/lib/mysql/log/master-bin
server-id=

　　2⃣️  主服务器增加同步账户，从服务器登录该账号同步主服务器的数据。

MariaDB [(none)]> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO backup@'192.168.5.207' IDENTIFIED BY 'password';

MariaDB [(none)]> Flush privileges;

注：backup：用户名    192.168.5.207：从服务器的IP(IP限制)     password：登录密码

　　3⃣️  从服务器：vi /etc/my.cnf.d/server.cnf 添加如下配置，同样保证salve-bin , relay-bin 文件存在，所属用户组与mysql一致并增加X权限。

# this is only for the mysqld standalone daemon
[mysqld]
log-bin=/var/lib/mysql/log/salve-bin
server-id=
relay-log=/var/lib/mysql/log/relay-bin
log-slave-updates=
read-only=1

重启从服务器  service mysql restart

　　4⃣️  主从配置：

主服务器：
MariaDB [(none)]> show master status;
+-------------------+----------+--------------+------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+------------------+
| master-bin. |     |              |                  |
+-------------------+----------+--------------+------------------+
 row in set (0.00 sec)

从服务器：
MariaDB [(none)]> change master to master_host='192.168.5.206',
    -> master_user='backup',
    -> master_password='password',
    -> master_log_file='master-bin.000003',
    -> master_log_pos=;
Query OK,  rows affected (0.03 sec)

MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)

如果此处出现错误， MariaDB [(none)]> reset slave;  重新从服务器重新上述操作。

MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.5.206
Master_User: backup1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: master-bin.000004
Read_Master_Log_Pos: 23773
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 24061
Relay_Master_Log_File: master-bin.000004
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: 23773
Relay_Log_Space: 24640
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
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: No
Gtid_IO_Pos:
1 row in set (0.00 sec)

ERROR: No query specified

至此，已经OK了。