GTID复制模式切换与传统主从复制间切换
GTID复制模式切换到传统主从复制
主从复制环境：
主库：10.18.10.11
从库：10.18.10.12
MySQL5.7.22
切换之前查看下主从gitd_mode参数值
主服务器：gtid_mode值
root@sakila 11:45: [(none)]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | ON |
+---------------+-------+
1 row in set (0.01 sec)
从服务器gitd_mode值：
root@sakila 11:44: [(none)]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | ON |
+---------------+-------+
1 row in set (0.01 sec)
root@sakila 11:47: [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.18.10.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: on.000012
Read_Master_Log_Pos: 346
Relay_Log_File: slave-relay-bin.000024
Relay_Log_Pos: 505
Relay_Master_Log_File: on.000012
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: 346
Relay_Log_Space: 753
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: 3306100
Master_UUID: b8439fb9-4f22-11e8-a24e-000c291a6b52
Master_Info_File: mysql.slave_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: b8439fb9-4f22-11e8-a24e-000c291a6b52:103
Executed_Gtid_Set: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103
Auto_Position: 0
Replicate_Rewrite_db:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
先在从库上关闭slave，停止主从复制，然后修改复制模式为传统模式，master_auto_position=0
root@sakila 11:48: [(none)]> stop slave;
Query OK, 0 rows affected (0.00 sec)
root@sakila 11:50: [(none)]> CHANGE MASTER TO master_auto_position=0,
Master_Host='10.18.10.11',
MASTER_USER='repluser',
MASTER_PASSWORD='rep123',
Master_Log_File='on.000012',
MASTER_LOG_POS=346;
Query OK, 0 rows affected, 2 warnings (0.03 sec)
root@sakila 11:52: [(none)]> start slave;
Query OK, 0 rows affected (0.01 sec)
root@sakila 11:53: [(none)]> set global gtid_mode=on_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 11:53: [(none)]> set global gtid_mode=off_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 11:54: [(none)]> set global gtid_mode=off;
Query OK, 0 rows affected (0.01 sec)
root@sakila 11:55: [(none)]> set global enforce_gtid_consistency=off;
Query OK, 0 rows affected (0.00 sec)
root@sakila 11:55: [(none)]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | OFF |
+---------------+-------+
1 row in set (0.00 sec)
同样主库做如下操作：
root@sakila 11:45: [(none)]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | ON |
+---------------+-------+
1 row in set (0.01 sec)
root@sakila 11:46: [(none)]> set global gtid_mode=on_permissive;
Query OK, 0 rows affected (0.02 sec)
root@sakila 11:53: [(none)]> set global gtid_mode=off_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 11:54: [(none)]> set global gtid_mode=off;
Query OK, 0 rows affected (0.02 sec)
root@sakila 11:55: [(none)]> set global enforce_gtid_consistency=off;
Query OK, 0 rows affected (0.00 sec)
root@sakila 11:55: [(none)]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | OFF |
+---------------+-------+
1 row in set (0.00 sec)
两边gtid复制模式方式现已关闭，同时开始传统模式，开始验证传统复制模式是否生效： 验证前查记录下当前Excuted_Gtid_Set值，方便后面做对比。
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103
Auto_Position: 0
Replicate_Rewrite_db: 在主库插入数据：
root@sakila 12:11: [test]> select * from tt;
+----+-------+-------+
| id | name | score |
+----+-------+-------+
| 1 | Tome | 80 |
| 2 | Janne | 90 |
| 3 | Kases | 84 |
| 4 | kids | 99 |
+----+-------+-------+
4 rows in set (0.00 sec)
root@sakila 12:12: [test]> insert into tt (name,score) values('MySQL',82);
Query OK, 1 row affected (0.01 sec)
root@sakila 12:13: [test]> select * from tt;
+----+-------+-------+
| id | name | score |
+----+-------+-------+
| 1 | Tome | 80 |
| 2 | Janne | 90 |
| 3 | Kases | 84 |
| 4 | kids | 99 |
| 5 | MySQL | 82 |
+----+-------+-------+
5 rows in set (0.00 sec) 从库查看插入数据：
root@sakila 12:06: [(none)]> use test
Database changed
root@sakila 12:14: [test]> select * from tt;
+----+-------+-------+
| id | name | score |
+----+-------+-------+
| 1 | Tome | 80 |
| 2 | Janne | 90 |
| 3 | Kases | 84 |
| 4 | kids | 99 |
| 5 | MySQL | 82 |
+----+-------+-------+
5 rows in set (0.00 sec) 发现数据已经过来了 ，再查看Excuted_Gtid_Set的值 root@sakila 12:14: [test]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.18.10.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: on.000015
Read_Master_Log_Pos: 461
Relay_Log_File: slave-relay-bin.000008
Relay_Log_Pos: 620
Relay_Master_Log_File: on.000015
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
--------------------省略--------------
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103
Auto_Position: 0
Replicate_Rewrite_db:
Channel_Name:
Master_TLS_Version:
通过对比发现GTID的值没有增加，证明切换成功。
通过传统主从模式切换到GTID主从复制模式：
在主从库上修改enforce_gtid_consistency=warn,确保在error.log中不出现警告信息，如果有需要先修复。
主库：
root@sakila 12:13: [test]> set global enforce_gtid_consistency=warn;
Query OK, 0 rows affected (0.00 sec)
root@sakila 12:19: [test]> show variables like '%enforce_gtid_consistency%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| enforce_gtid_consistency | WARN |
+--------------------------+-------+
1 row in set (0.01 sec)
从库：
root@sakila 12:18: [test]> set global enforce_gtid_consistency=warn;
Query OK, 0 rows affected (0.00 sec)
root@sakila 12:19: [test]> show variables like '%enforce_gtid_consistency%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| enforce_gtid_consistency | WARN |
+--------------------------+-------+
1 row in set (0.01 sec)
在主从库上调整enforce_gtid_consistency=on,保证GTID的一致性
主库：
root@sakila 12:20: [test]> set global enforce_gtid_consistency=on;
Query OK, 0 rows affected (0.00 sec)
root@sakila 12:21: [test]> show variables like '%enforce_gtid_consistency%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| enforce_gtid_consistency | ON |
+--------------------------+-------+
1 row in set (0.01 sec)
从库：
root@sakila 12:20: [test]> set global enforce_gtid_consistency=on;
Query OK, 0 rows affected (0.00 sec)
root@sakila 12:22: [test]> show variables like '%enforce_gtid_consistency%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| enforce_gtid_consistency | ON |
+--------------------------+-------+
1 row in set (0.01 sec)
然后在主从库安装前面的顺序再一次修改回去，直至gtid_mode=on为止
主库操作：
root@sakila 12:21: [test]> set global gtid_mode=off_permissive;
Query OK, 0 rows affected (0.02 sec)
root@sakila 12:24: [test]> set global gtid_mode=on_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:24: [test]> set global gtid_mode=on;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:24: [test]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | ON |
+---------------+-------+
1 row in set (0.00 sec)
从库操作：
root@sakila 12:22: [test]> set global gtid_mode=off_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:25: [test]> set global gtid_mode=on_permissive;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:25: [test]> set global gtid_mode=on;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:25: [test]> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode | ON |
+---------------+-------+
1 row in set (0.01 sec)
提示：上述gtid_mode参数值修改必须严格安装顺序依次修改，否则会报错。
查看从库的参数Ongoing_anonymous_transaction_count参数值是否为0，如果为0，意味着没有等待的事务，可以直接进行后面的操作
root@sakila 12:29: [test]> show global status like '%ongoing_anonymous%';
+-------------------------------------+-------+
| Variable_name | Value |
+-------------------------------------+-------+
| Ongoing_anonymous_transaction_count | 0 |
+-------------------------------------+-------+
1 row in set (0.01 sec)
说明没有等待提交的事务，可以进入后面的操作。
再次核对GTID相关参数状态：
主服务器：
root@sakila 12:24: [test]> show variables like '%gtid%';
+----------------------------------+-------------------------------------------+
| Variable_name | Value |
+----------------------------------+-------------------------------------------+
| binlog_gtid_simple_recovery | ON |
| enforce_gtid_consistency | ON |
| gtid_executed_compression_period | 1000 |
| gtid_mode | ON |
| gtid_next | AUTOMATIC |
| gtid_owned | |
| gtid_purged | b8439fb9-4f22-11e8-a24e-000c291a6b52:1-92 |
| session_track_gtids | OFF |
+----------------------------------+-------------------------------------------+
8 rows in set (0.06 sec)
从服务器：
root@sakila 12:29: [test]> show variables like '%gtid%';
+----------------------------------+-------------------------------------------+
| Variable_name | Value |
+----------------------------------+-------------------------------------------+
| binlog_gtid_simple_recovery | ON |
| enforce_gtid_consistency | ON |
| gtid_executed_compression_period | 1000 |
| gtid_mode | ON |
| gtid_next | AUTOMATIC |
| gtid_owned | |
| gtid_purged | b8439fb9-4f22-11e8-a24e-000c291a6b52:1-95 |
| session_track_gtids | OFF |
+----------------------------------+-------------------------------------------+
8 rows in set (0.01 sec)
把传统的复制模式改为GTID模式要把传统的复制停掉，然后执行stop slave，然后执行change master to master_auto_position=1
停止slave，查看当前主从状态：
root@sakila 12:35: [test]> stop slave;
Query OK, 0 rows affected (0.01 sec)
root@sakila 12:35: [test]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 10.18.10.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: on.000018
Read_Master_Log_Pos: 194
Relay_Log_File: slave-relay-bin.000014
Relay_Log_Pos: 353
Relay_Master_Log_File: on.000018
Slave_IO_Running: No
Slave_SQL_Running: No
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: 194
Relay_Log_Space: 601
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: NULL
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: 3306100
Master_UUID: b8439fb9-4f22-11e8-a24e-000c291a6b52
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
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: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103
Auto_Position: 0
Replicate_Rewrite_db:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
show slave status
root@sakila 12:36: [test]> change master to master_auto_position=1;
Query OK, 0 rows affected (0.02 sec)
root@sakila 12:36: [test]> start slave;
Query OK, 0 rows affected (0.00 sec)
root@sakila 12:37: [test]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.18.10.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: on.000018
Read_Master_Log_Pos: 194
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 353
Relay_Master_Log_File: on.000018
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: 194
Relay_Log_Space: 561
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: 3306100
Master_UUID: b8439fb9-4f22-11e8-a24e-000c291a6b52
Master_Info_File: mysql.slave_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: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103
Auto_Position: 1
Replicate_Rewrite_db:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
show slave status
验证切换是否成功，主库插入数据:
root@sakila 12:30: [test]> insert into tt (name,score) values('gtid',82);
Query OK, 1 row affected (0.00 sec)
root@sakila 12:38: [test]> insert into tt (name,score) values('gtid_on',85);
Query OK, 1 row affected (0.00 sec)
root@sakila 12:38: [test]> select * from tt;
+----+---------+-------+
| id | name | score |
+----+---------+-------+
| 1 | Tome | 80 |
| 2 | Janne | 90 |
| 3 | Kases | 84 |
| 4 | kids | 99 |
| 5 | MySQL | 82 |
| 6 | gtid | 82 |
| 7 | gtid_on | 85 |
+----+---------+-------+
7 rows in set (0.01 sec)
从库查看数据和Excuted_Gtid_Set对应值是否发生变化：
root@sakila 12:37: [test]> select * from tt;
+----+---------+-------+
| id | name | score |
+----+---------+-------+
| 1 | Tome | 80 |
| 2 | Janne | 90 |
| 3 | Kases | 84 |
| 4 | kids | 99 |
| 5 | MySQL | 82 |
| 6 | gtid | 82 |
| 7 | gtid_on | 85 |
+----+---------+-------+
7 rows in set (0.00 sec)
root@sakila 12:40: [test]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.18.10.11
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: on.000018
Read_Master_Log_Pos: 729
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 888
Relay_Master_Log_File: on.000018
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_db:
Replicate_Ignore_db:
--------省略部分---------------------
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: b8439fb9-4f22-11e8-a24e-000c291a6b52:104-105
Executed_Gtid_Set: b8439fb9-4f22-11e8-a24e-000c291a6b52:1-105
Auto_Position: 1
Replicate_Rewrite_db:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
通过上述查询，发现数据已经复制过来，说明数据同步成功，而Excuted_Gtid_Set的值由“ b8439fb9-4f22-11e8-a24e-000c291a6b52:1-103” 变换为：“b8439fb9-4f22-11e8-a24e-000c291a6b52:1-105”，说明切换成功，因为GTID的值增加了 ，证明开启了GTID的复制方式。
MySQL的传统复制方式和GTID方式互相切换演示完成，需要注意的是gtid_mode的值虽然支持动态修改，但是在修改时不能跳跃式的修改，必须得严格按照顺序修改。
参考：https://www.cnblogs.com/kindnull/p/9061968.html
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