mysql5.7 主从同步

数据库版本

mysql --version
mysql  Ver 14.14 Distrib 5.7.32, for Linux (x86_64) using  EditLine wrapper

1，主数据库设置

my.cnf 

//更改之后重启数据库

erver-id=1 
log-bin=mysql-bin

//新建同步用户

set global validate_password_policy=0;
set global validate_password_length=1;
grant FILE on *.* to 'rep'@'192.168.0.201' identified by '123456'; 
grant replication slave on *.* to 'rep'@'192.168.0.201' identified by '123456'; 
flush privileges;

//记录主数据库日志文件位置

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |     1350 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

2，备数据库设置

my.cnf

//重启数据库

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

//设置主备同步

//填入主数据库日志文件名称，pos位置

change master to master_host='192.168.0.205',
master_user='rep',
master_password='123456',
master_log_file='mysql-bin.000002', 
master_log_pos=1350;

启动

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

检查状态

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.205
                  Master_User: rep
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 1350
               Relay_Log_File: node01-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000002
             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: 1350
              Relay_Log_Space: 528
              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_UUID: 8a59fbeb-3a39-11eb-ac5f-000c29ccec7f
             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 more up                        dates
           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)

ERROR:
No query specified

mysql>

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