1、在主库进行一次全备

mysqldump  -uroot -p --single-transaction --master-data=2 --all-databases -R -E  -e -q --triggers    >/home/sa/all_databases_20190523.sql

切记： 不要加--set-gtid-purged=off 参数，不然导入从库后，报 error 1236的错误。

/usr/local/mysql/bin/mysqldump -uroot -p --set-gtid-purged=off -R -E --triggers --single-transaction --hex-blob --skip-opt --add-drop-table --create-options -e -q --set-charset --all-databases >/home/all_databases_20190318.sql

mysqldump -uroot -p --skip-opt --create-options --add-drop-table --set-charset --single-transaction -q -e --triggers -R -E --set-gtid-purged=OFF --hex-blob Tracker114 T1_Doctor XR_DoctorTitle T2_AppointmentOrderForService XR_DutySource XR_Schedule T1_AppointmentOrder DW_Order_ThirdParty DW_Doctor_ThirdParty >/home/sa/Tracker114_20191016_new.sql

在新的服务器上建立主从复制关系：

mysql> change master to master_user='repl', master_host='172.18.16.120',master_password='Repl123#',master_auto_position=1;

ERROR1201 (HY000): Could not initialize master info structure; more error messages can be found in the MySQL error log

然后根据提示，查看error log

[root@test.db2.idc2 log]# tail -f mysqld.log

2019-08-27T12:03:49.321764Z 6 [Warning] 'user' entry 'root@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.321835Z 6 [Warning] 'user' entry 'mysql.sys@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.321885Z 6 [Warning] 'user' entry 'sysbench@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.321953Z 6 [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.321963Z 6 [Warning] 'db' entry 'sbtest sysbench@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.321994Z 6 [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:03:49.322400Z 6 [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode.

2019-08-27T12:12:13.148834Z 8 [Note] Access denied for user 'root'@'localhost'(using password: YES)2019-08-27T12:15:57.111498Z 9 [Note] Slave: MTS group recovery relay log info based on Worker-Id 1, group_relay_log_name /home/data/mysql57/relay/relay-bin.001715, group_relay_log_pos 247807655 group_master_log_name mysql-bin.000820, group_master_log_pos 247807442

2019-08-27T12:15:57.111528Z 9 [ERROR] Error looking for /home/data/mysql57/relay/relay-bin.001715.

解决方法：在新的从库上，重置relay log日志

mysql> reset slave all;

Query OK, 0 rows affected (0.00 sec)

接着继续，在新的服务器上继续建立主从复制关系：

mysql> change master to master_user='repl', master_host='172.18.16.120',master_password='Repl123#',master_auto_position=1;

Query OK,0 rows affected, 2 warnings (0.02sec)

mysql>start slave;

Query OK,0 rows affected (0.01 sec)

查看从库的复制状态：

mysql>show slave status\G;*************************** 1. row ***************************Slave_IO_State:

Master_Host:172.18.16.120Master_User: repl

Master_Port:3306Connect_Retry:60Master_Log_File:

Read_Master_Log_Pos:4Relay_Log_File: relay-bin.000001Relay_Log_Pos:4Relay_Master_Log_File:

Slave_IO_Running: No

Slave_SQL_Running: Yes

Replicate_Do_DB:

Replicate_Ignore_DB: mysql

Replicate_Do_Table:

Replicate_Ignore_Table:

Replicate_Wild_Do_Table:

Replicate_Wild_Ignore_Table:

Last_Errno:0Last_Error:

Skip_Counter:0Exec_Master_Log_Pos:0Relay_Log_Space:154Until_Condition: None

Until_Log_File:

Until_Log_Pos:0Master_SSL_Allowed: No

Master_SSL_CA_File:

Master_SSL_CA_Path:

Master_SSL_Cert:

Master_SSL_Cipher:

Master_SSL_Key:

Seconds_Behind_Master:0Master_SSL_Verify_Server_Cert: No

Last_IO_Errno:1236Last_IO_Error: Got fatal error1236 from master when reading data from binary log: 'The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires.'Last_SQL_Errno:0Last_SQL_Error:

Replicate_Ignore_Server_Ids:

Master_Server_Id:120Master_UUID: 0851a6d6-c8af-11e9-a81c-fa163efebf11

Master_Info_File: mysql.slave_master_info

SQL_Delay:0SQL_Remaining_Delay:NULLSlave_SQL_Running_State: Slave hasread all relay log; waiting formore updates

Master_Retry_Count:86400Master_Bind:

Last_IO_Error_Timestamp:190827 20:23:05Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set: a14948ec-c8b4-11e9-935a-fa163ef7bf86:1-2Auto_Position:1Replicate_Rewrite_DB:

Channel_Name:

查看error log日志

2019-08-27T12:23:05.777385Z 10 [ERROR] Error reading packet from server for channel '': The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires. (server_errno=1236)2019-08-27T12:23:05.777424Z 10 [ERROR] Slave I/O for channel '': Got fatal error 1236 from master when reading data from binary log: 'The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires.', Error_code: 1236

2019-08-27T12:23:05.777431Z 10 [Note] Slave I/O thread exiting for channel '', read up to log 'FIRST', position 4

解决方法：

1、查看主库的master gtid_purged 2、show global variables like '%gtid%'; 找到gtid_purged的值

2、set @@global.gtid_purged='6b156871-8ae7-11e7-88bb-fa163e55e9ea:1-35268634';