给内部一个数据库做异地热备，热备部分采用了 MariaDB 的 galera 集群模式。然后挑选其中一台作为 Slave 和深圳主集群做主从同步。
主集群是老环境，用的版本还是是 MySQL 5.5.13。用常规办法创建主从同步
MariaDB [(none)]>change master to master_host='192.168.1.100',master_user='rpl',master_password='rpl@201809',master_log_file='mysql-bin.001091',MASTER_LOG_POS=137962110,master_connect_retry=30; MariaDB [(none)]>start slave;
结果有如下报错：
MariaDB [(none)]> show slave statusG
*************************** 1. row ***************************
Slave_IO_State: WAIting for master to send event
Master_Host: 192.168.1.100
Master_User: rpl
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.001093
Read_Master_Log_Pos: 77139171
Relay_Log_File: udb158-relay-bin.000002
Relay_Log_Pos: 237764027
Relay_Master_Log_File: mysql-bin.001091
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: 1146
Last_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist
Skip_Counter: 0
Exec_Master_Log_Pos: 375725743
Relay_Log_Space: 2086663884
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: 105914
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1146
Last_SQL_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist
Replicate_Ignore_Server_Ids:
Master_Server_Id: 15410
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: No
Gtid_IO_Pos:
1 row in set (0.00 sec)
错误信息为：Last_SQL_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist
搜了下资料，大部分说是没有执行 mysql_upgrade 导致的，不过我们这边的 MariaDB 是 Docker 跑的，而且用了很长时间了，理论上应该是没问题的才对。
既然提示没有这个表：Table 'mysql.gtid_slave_pos' doesn't exist，那我就创建一个吧！
从网上找到这个建表语句：
CREATE TABLE `gtid_slave_pos` (
`domain_id` int(10) unsigned NOT NULL,
`sub_id` bigint(20) unsigned NOT NULL,
`server_id` int(10) unsigned NOT NULL,
`seq_no` bigint(20) unsigned NOT NULL,
PRIMARY KEY (`domain_id`,`sub_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Replication slave GTID state';
在作为 Slave 的 MariaDB 上执行，然后重启 slave 后问题解决，过程如下：
MariaDB [(none)]> show slave statusG
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.100
Master_User: rpl
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.001093
Read_Master_Log_Pos: 77139171
Relay_Log_File: udb158-relay-bin.000002
Relay_Log_Pos: 237764027
Relay_Master_Log_File: mysql-bin.001091
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: 1146
Last_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist
Skip_Counter: 0
Exec_Master_Log_Pos: 375725743
Relay_Log_Space: 2086663884
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: 105914
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1146
Last_SQL_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist
Replicate_Ignore_Server_Ids:
Master_Server_Id: 15410
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: No
Gtid_IO_Pos:
1 row in set (0.00 sec)
MariaDB [(none)]> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
MariaDB [mysql]> CREATE TABLE `gtid_slave_pos` (
-> `domain_id` int(10) unsigned NOT NULL,
-> `sub_id` bigint(20) unsigned NOT NULL,
-> `server_id` int(10) unsigned NOT NULL,
-> `seq_no` bigint(20) unsigned NOT NULL,
-> PRIMARY KEY (`domain_id`,`sub_id`)
-> ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Replication slave GTID state';
Query OK, 0 rows affected (0.01 sec)
MariaDB [mysql]> stop slave;
Query OK, 0 rows affected (0.04 sec)
MariaDB [mysql]> start slave;
Query OK, 0 rows affected (0.00 sec)
MariaDB [mysql]> show slave statusG
*************************** 1. row ***************************
Slave_IO_State: Queueing master event to the relay log
Master_Host: 192.168.1.100
Master_User: rpl
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.001093
Read_Master_Log_Pos: 1059879280
Relay_Log_File: udb158-relay-bin.000002
Relay_Log_Pos: 390833600
Relay_Master_Log_File: mysql-bin.001091
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: 528795316
Relay_Log_Space: 3069404437
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: 101616
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: 15410
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: No
Gtid_IO_Pos:
1 row in set (0.00 sec)
MariaDB [mysql]>
