Mysql5.7.25 master-slave replication (one-way)

mount this database ：https://blog.csdn.net/u010533511/article/details/88033637

Master To configure

1）my.cnf To configure

vim /etc/my.cnf

[mysqld]
log-bin=mysql-bin   //[ must ] Enable binary logging
server-id=139       //[ must ] The server is unique ID, The default is 1, Usually take IP The last paragraph

binlog-do-db=ztong  # Specify the database that needs logging

binlog_format= MIXED  #binlog Log format ,mysql By default statement, It is recommended to use mixed

slave_skip_errors = 1062   # Skip primary key conflict error

2） restart mysql

service mysqld restart

3） Set up an account on the primary server and authorize slave

#mysql –u root –p 123456 
mysql>GRANT REPLICATION SLAVE ON *.* to 'mysync'@'%' identified by '123456';
 // Generally do not use root Account number ,“%” Indicates that all clients may be connected to , Just account number , The password is correct , Specific clients are available here IP Instead of , Such as 192.168.135.139, Enhance security .

4) Sign in mysql, Inquire about master The state of

mysql>show master status;

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000010 |      591 | ztong        |                  |                   |

notes ： Do not operate the master server after this step MYSQL, Prevent the state value of the primary server from changing .

File: mysql-bin.000010    Position: 591 These two values will be used later

Slave To configure

1）my.cnf To configure

vim /etc/my.cnf

[mysqld]
log-bin=mysql-bin   //[ must ] Enable binary logging
server-id=141       //[ must ] The server is unique ID, The default is 1, Usually take IP The last paragraph

2） restart mysql

service mysql restart

3） Configure slave Slave：

# Database replication synchronization statement  master_log_file： Corresponding master Of file 
#master_log_pos： Yes master  The location of the log file corresponds to master  Of position
mysql> change master to master_host='192.168.135.139',master_port=3306,master_user='mysync',master_password='123456',master_log_file='mysql-bin.000010',master_log_pos=591;


mysql> start slave;    // Start copy from server 

4) Check the status of the copy function from the server ：
mysql> show slave status\G;

mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.135.139
                  Master_User: mysync
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000010
          Read_Master_Log_Pos: 591 // In the current primary server binary log ,SLAVE Medium I/O Where the thread has read 
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 320 // In the current relay log ,SQL Where the thread has read and executed 
        Relay_Master_Log_File: mysql-bin.000010
             Slave_IO_Running: Yes //I/O Whether the thread is started and successfully connected to the main server 
            Slave_SQL_Running: Yes //SQL Whether the thread is started 
              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: 591
              Relay_Log_Space: 531
              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 // From the server SQL Thread and server I/O The time gap between threads , Unit in seconds 
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: 139
                  Master_UUID: 383b83a3-3b1f-11e9-986d-000c295d359a
             Master_Info_File: /data/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           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
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)

Slave_IO_Running: Yes       Responsible for communication with the host io signal communication

Slave_SQL_Running: Yes   Be responsible for your own slave mysql process

All are yes Explain normal

test ： Link to the database , Create database ztong  , Create a test table

If you need to reconfigure the slave Library

mysql> slave stop

mysql> change master to master_host='192.168.135.139',master_port=3306,master_user='mysync',master_password='123456',master_log_file='mysql-bin.000010',master_log_pos=591;
mysql> start slave;