MySQL 停机冷备搭建主从复制

环境：
mysql5.7.27
192.168.56.12 master
192.168.56.13 slave

1、停止主库备库
systemctl stop mysqld

2、复制主库文件到备库
a，备库切换到mysql datadir 目录,执行命令
nc -l 6666 |tar -C ./ -xf -

b，主库切换到mysql datadir 目录,执行命令
tar -cf - test1 |nc mysql2 6666 （需要同步的数据库）
tar -cf - ibdata1 |nc mysql2 6666
tar -cf - ib_logfile* |nc mysql2 6666
tar -cf - mysql |nc mysql2 6666

3、启动主备库
systemctl start mysqld

4、重新配置主从复制
a，主库：
mysql> show master status \G
*************************** 1. row ***************************
File: mysql-bin.000007
Position: 154
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)

b，备库
mysql> stop slave
-> ;
Query OK, 0 rows affected (0.01 sec)

mysql> RESET SLAVE ALL
-> ;
Query OK, 0 rows affected (0.05 sec)

mysql> change master to
-> master_host=‘192.168.56.12’,
-> master_user=‘repl’,
-> master_password=‘xxxxxxx’,
-> master_port=3306,
-> master_log_file=‘mysql-bin.000007’,
-> master_log_pos=154 ;
Query OK, 0 rows affected, 2 warnings (0.04 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.56.12
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 154
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000007
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: 527
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: b0055e26-c32c-11e9-aab0-080027f0c19a
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 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