MySQL master-slave database configuration

use tools

MySQL data version: 5.6.36-log,
two cloud servers (Linux system)

First of all, it needs to be installed under the Linux system MySQL, the specific steps can be referred to here , and ensure that the two hosts can access each other, you can ping directly.

Configure Master

In the Linuxenvironment, MySQLthe configuration file is in /ect/my.cnf, open and edit the file directly:vim /etc/my.cnf
[mysqld]Enter configuration under

log-bin=mysql-bin
server-id=2
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
binlog-do-db=rwtest

The one here is server-idused to identify the unique database, here it is set to 2, and the slave library needs to be set to other values .

binlog-ignore-db: Indicates the database to ignore when synchronizing
binlog-do-db: Specify the database that needs to be synchronized

Reboot MySQL:service mysqld restart
Log MySQLin and authorize access users: Slave machines require Filepermissions and REPLICATION SLAVEpermissions, and of course full permissions can be granted.

grant file on *.* to 'root'@'%' identified by 'your password';

grant replication slave on *.* to 'root'@'%' identified by 'your password';

flush privileges;

or

grant all privileges on *.* to 'root'@'%' identified by 'your password';

flush privileges;

After completion, you can view Masterthe status below:show master status

mysql> show master status;
+------------------+----------+--------------+----------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                 | Executed_Gtid_Set |
+------------------+----------+--------------+----------------------------------+-------------------+
| mysql-bin.000001 |     2272 | rwtest       | information_schema,mysql |                   |
+------------------+----------+--------------+----------------------------------+-------------------+
1 row in set (0.03 sec)

Both here Fileand Positionin Slaveare used, Binlog_Do_DBreferring to the database that needs to be synchronized, referring to the database Binlog_Ignore_DBthat does not need to be synchronized, which is the value just configured.

Configure Slave

Also write the configuration file under [mysqld]

log-bin=mysql-bin
server-id=3
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
replicate-do-db=rwtest
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all
slave-net-timeout=60

After the configuration is complete, restart it MySQLand enter the settings corresponding to it.Master

mysql> stop slave;  #关闭Slave
mysql> change master to master_host='Master主机IP',master_user='刚才授权的用户',master_password='your password',master_log_file='mysql-bin.000001', master_log_pos=2272;

mysql> start slave;  #开启Slave

master_log_fileand master_log_posare the status values of the Master. must correspond .

Slave_IO_State: Waiting for master to send event
                  Master_Host: 你的Master主机IP
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 2272
               Relay_Log_File: izwz9fcvpu481xh55cegx0z-relay-bin.000002
                Relay_Log_Pos: 1339
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: rwtest
          Replicate_Ignore_DB: mysql
           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: 2272
              Relay_Log_Space: 1530
              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: 2
                  Master_UUID: de20814f-2fb8-11e7-8f61-5254002b91a1
             Master_Info_File: /var/lib/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
1 row in set (0.03 sec)

If there is no Error reported in the status, it means that the configuration is successful.

Next, you connect the two databases through a visual tool, and perform additions, deletions and modifications in the main library, and there will be corresponding operations in the slave library, but such operations in the slave library are invalid for the main library.