Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Won't Fix
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10.0.20-galera
Description
If a MariaDB Galera Cluster 10.0 cluster is configured as a slave of MariaDB 10.0 using GTID, GTIDs from the master do not propagate to the WSREP replication stream. This makes it difficult to use master_use_gtid=current_pos if you ever need to switch slaves, since the non-slave nodes in the cluster won't be aware of the master's GTIDs.
Let's say we have a replication topology like this:
| MariaDB 10.0 | --- master_use_gtid=current_pos ---> | MariaDB Galera Cluster 10.0 (galera1) | <--- WSREP ---> | MariaDB Galera Cluster 10.0 (galera2) |
|
On the master:
MariaDB [tmp]> show global variables like 'server_id';
|
+---------------+-------+
|
| Variable_name | Value |
|
+---------------+-------+
|
| server_id | 2 |
|
+---------------+-------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [tmp]> show global variables like 'gtid_domain_id';
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+----------------+-------+
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| Variable_name | Value |
|
+----------------+-------+
|
| gtid_domain_id | 22 |
|
+----------------+-------+
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1 row in set (0.00 sec)
|
|
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MariaDB [tmp]> show global variables like 'gtid_current_pos';
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+------------------+-------+
|
| Variable_name | Value |
|
+------------------+-------+
|
| gtid_current_pos | |
|
+------------------+-------+
|
1 row in set (0.00 sec)
|
On galera1:
MariaDB [(none)]> show global variables like 'server_id';
|
+---------------+-------+
|
| Variable_name | Value |
|
+---------------+-------+
|
| server_id | 1 |
|
+---------------+-------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [(none)]> show global variables like 'gtid_domain_id';
|
+----------------+-------+
|
| Variable_name | Value |
|
+----------------+-------+
|
| gtid_domain_id | 21 |
|
+----------------+-------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [(none)]> show global variables like 'gtid_current_pos';
|
+------------------+--------+
|
| Variable_name | Value |
|
+------------------+--------+
|
| gtid_current_pos | 21-1-3 |
|
+------------------+--------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [(none)]> show slave status\G
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*************************** 1. row ***************************
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Slave_IO_State: Waiting for master to send event
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Master_Host: 192.168.1.33
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Master_User: repl
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Master_Port: 3306
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Connect_Retry: 60
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Master_Log_File: mariadb-bin.000001
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Read_Master_Log_Pos: 314
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Relay_Log_File: localhost-relay-bin.000002
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Relay_Log_Pos: 603
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Relay_Master_Log_File: mariadb-bin.000001
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Slave_IO_Running: Yes
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Slave_SQL_Running: Yes
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Replicate_Do_DB:
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Replicate_Ignore_DB:
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Replicate_Do_Table:
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Replicate_Ignore_Table:
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Replicate_Wild_Do_Table:
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Replicate_Wild_Ignore_Table:
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Last_Errno: 0
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Last_Error:
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Skip_Counter: 0
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Exec_Master_Log_Pos: 314
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Relay_Log_Space: 904
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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Seconds_Behind_Master: 0
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 0
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Last_IO_Error:
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Last_SQL_Errno: 0
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Last_SQL_Error:
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 2
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Using_Gtid: Current_Pos
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Gtid_IO_Pos: 21-1-3
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1 row in set (0.00 sec)
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On galera2:
MariaDB [(none)]> show global variables like 'server_id';
|
+---------------+-------+
|
| Variable_name | Value |
|
+---------------+-------+
|
| server_id | 1 |
|
+---------------+-------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [(none)]> show global variables like 'gtid_domain_id';
|
+----------------+-------+
|
| Variable_name | Value |
|
+----------------+-------+
|
| gtid_domain_id | 21 |
|
+----------------+-------+
|
1 row in set (0.00 sec)
|
|
|
MariaDB [(none)]> show global variables like 'gtid_current_pos';
|
+------------------+---------+
|
| Variable_name | Value |
|
+------------------+---------+
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| gtid_current_pos | 21-1-10 |
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+------------------+---------+
|
1 row in set (0.00 sec)
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Now let's insert some data on the master to see how it affects gtid_current_pos:
MariaDB [tmp]> INSERT INTO tmp.test_table VALUES (1, 'str');
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Query OK, 1 row affected (0.00 sec)
|
|
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MariaDB [tmp]> show global variables like 'gtid_current_pos';
|
+------------------+--------+
|
| Variable_name | Value |
|
+------------------+--------+
|
| gtid_current_pos | 22-2-1 |
|
+------------------+--------+
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On galera1:
MariaDB [(none)]> show global variables like 'gtid_current_pos';
|
+------------------+---------------+
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| Variable_name | Value |
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+------------------+---------------+
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| gtid_current_pos | 22-2-1,21-1-3 |
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+------------------+---------------+
|
1 row in set (0.00 sec)
|
|
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MariaDB [(none)]> show slave status\G
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*************************** 1. row ***************************
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Slave_IO_State: Waiting for master to send event
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Master_Host: 192.168.1.33
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Master_User: repl
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Master_Port: 3306
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Connect_Retry: 60
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Master_Log_File: mariadb-bin.000001
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Read_Master_Log_Pos: 485
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Relay_Log_File: localhost-relay-bin.000002
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Relay_Log_Pos: 774
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Relay_Master_Log_File: mariadb-bin.000001
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Slave_IO_Running: Yes
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Slave_SQL_Running: Yes
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Replicate_Do_DB:
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Replicate_Ignore_DB:
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Replicate_Do_Table:
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Replicate_Ignore_Table:
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Replicate_Wild_Do_Table:
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Replicate_Wild_Ignore_Table:
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Last_Errno: 0
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Last_Error:
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Skip_Counter: 0
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Exec_Master_Log_Pos: 485
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Relay_Log_Space: 1075
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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Seconds_Behind_Master: 0
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 0
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Last_IO_Error:
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Last_SQL_Errno: 0
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Last_SQL_Error:
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 2
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Using_Gtid: Current_Pos
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Gtid_IO_Pos: 21-1-3,22-2-1
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1 row in set (0.00 sec)
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On galera2 the value is now empty:
MariaDB [(none)]> show global variables like 'gtid_current_pos';
|
+------------------+-------+
|
| Variable_name | Value |
|
+------------------+-------+
|
| gtid_current_pos | |
|
+------------------+-------+
|
1 row in set (0.00 sec)
|
Attachments
Issue Links
- is caused by
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MDEV-20720 Galera: Replicate MariaDB GTID to other nodes in the cluster
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- Closed
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- relates to
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- Closed
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