Windows下Mysql主从配置

Windows下MySQL的主从配置

准备

主master：127.0.0.1:53306

从slave：127.0.0.1:53307

版本：mysql-5.7.31

前置

在主库生成一个用来进行主从同步的账号
```
GRANT REPLICATION SLAVE ON *.* to 'test'@'127.0.0.1' identified by '123456';
flush privileges;
```
在这里就是生成的一个test的用户，密码为123456

配置

配置主库：

修改主库的配置文件my.ini

[mysqld]
#主库的server_id
server-id=1
#开启二进制日志
log-bin=mysql-bin
#需要同步的库，可以有多个，但不能写成 testdb,testdb1形式
binlog-do-db=testdb
#binlog-do-db=testdb1
#不需要同步的数据库，与binlog-do-db二选一即可
#binlog-ignore-db=mysql
#binlog-ignore-db=testdb2
#--------------------------
###基础配置
##skip-grant-tables=1
port = 53306
basedir=D:mysql-5.7.31
datadir=D:mysql-5.7.31data
max_connections=200
character-set-server=utf8
default-storage-engine=INNODB
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysql]
default-character-set=utf8

这里有个问题要注意的就是server-id这些主从的配置需要放在最前面，否则会报错

重启mysql服务

net stop mysql53306		  	//停止主库mysql服务
net start mysql53306		//开启主库mysql服务

查询主服务器的日志名和当前的偏移量

show master status
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |      154 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+

配置从库

修改从库的配置文件my.ini

[mysqld]
#从库的server-id一般是以从库最后一个ip的数字来定，这里只是不同端口号，所以我用2
server_id=2
#开启二进制文件
log-bin=mysql-bin
#------------------------------------
##基础配置
##skip-grant-tables=1
port = 53307
basedir=D:mysql-5.7.31-1
datadir=D:mysql-5.7.31-1data
max_connections=200
character-set-server=utf8
default-storage-engine=INNODB
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysql]
default-character-set=utf8

与主库建立关联关系

change master to 
	master_host='127.0.0.1', 
	master_port=53306, 
	master_user='test',
	master_password='123456', 
	master_log_file='mysql-bin.000002',
    master_log_pos=154;

启动从库的进程

mysql> start slave;
Query OK, 0 rows affected (0.09 sec)

查看从库的状态

mysql> show slave status G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 127.0.0.1
                  Master_User: test
                  Master_Port: 53306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 154
               Relay_Log_File: admin-PC-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: 154
              Relay_Log_Space: 530
              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: 254a65d6-139e-11eb-8ca7-f0761c0a8ffb
             Master_Info_File: D:mysql-5.7.31-1datamaster.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)

ERROR:
No query specified

当Slave_IO_Running: Yes与Slave_SQL_Running: Yes当2个都为yes的时候，即代表主从同步配置已经完成。

出现的问题记录

未将server-id等主从配置放置最前面

出现Undefined variable server-id

在与主库建立连接的之后，后面出现错误，比如slave_io_running:no 或者 slave_sql_runing:no，就需要重置连接

mysql > stop slave;		//停止slave服务
mysql > reset slave;	//重置slave

###主库操作
mysql > flush logs;		//重新生成mmysql-bin.000003，文件名数字往后面加1
mysql > show master status;	//重新查看主库的状态

###从库--重新建立连接
mysql > change master to 
	master_host='127.0.0.1', 
	master_port=53306, 
	master_user='test',
	master_password='123456', 
	master_log_file='mysql-bin.000003',
    master_log_pos=154;

想生活，不想谋生