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MDEV-19801: Change defaults for CHANGE MASTER TO so that GTID-based replication is used by default if master supports it

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This commit makes replicas crash-safe by default by changing the
Using_Gtid value to be Slave_Pos on a fresh slave start and after
RESET SLAVE is issued. If the primary server does not support GTIDs
(i.e., version < 10), the replica will fall back to Using_Gtid=No on
slave start and after RESET SLAVE.

The following additional informational messages/warnings are added:

 1. When Using_Gtid is automatically changed. That is, if RESET
SLAVE reverts Using_Gtid back to Slave_Pos, or Using_Gtid is
inferred to No from a CHANGE MASTER TO given with log coordinates
without MASTER_USE_GTID.
 2. If options are ignored in CHANGE MASTER TO. If CHANGE MASTER TO
is given with log coordinates, yet also specifies
MASTER_USE_GTID=Slave_Pos, a warning message is given that the log
coordinate options are ignored.

Additionally, an MTR macro has been added for RESET SLAVE,
reset_slave.inc, which provides modes/options for resetting a slave
in log coordinate or gtid modes. When in log coordinates mode, the
macro will execute CHANGE MASTER TO MASTER_USE_GTID=No after the
RESET SLAVE command. When in GTID mode, an extra parameter,
reset_slave_keep_gtid_state, can be set to reset or preserve the
value of gtid_slave_pos.

Reviewed By:
===========
Andrei Elkin <andrei.elkin@mariadb.com>
This commit is contained in:
Brandon Nesterenko
2022-05-23 14:14:00 -06:00
parent 8c2faad576
commit 5ab5ff08b0
167 changed files with 1404 additions and 344 deletions
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13
mysql-test/suite/engines/funcs/r/rpl_trigger.result
View File

@@ -1,5 +1,10 @@
include/master-slave.inc
[connection master]
connection slave;
include/stop_slave.inc
CHANGE MASTER TO MASTER_USE_GTID=NO;
include/start_slave.inc
connection master;
call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT");
create table t1 (a int auto_increment, primary key (a), b int, rand_value double not null);
create table t2 (a int auto_increment, primary key (a), b int);
@@ -960,7 +965,9 @@ include/rpl_stop_server.inc [server_number=1]
include/rpl_start_server.inc [server_number=1]
--> Master binlog: Server ver: 5.0.16-debug-log, Binlog ver: 4
connection slave;
RESET SLAVE;
include/reset_slave.inc
Warnings:
Note 4190 RESET SLAVE is implicitly changing the value of 'Using_Gtid' from 'No' to 'Slave_Pos'
include/start_slave.inc
SELECT MASTER_POS_WAIT('master-bin.000001', 513) >= 0;
MASTER_POS_WAIT('master-bin.000001', 513) >= 0
@@ -991,7 +998,9 @@ DROP TRIGGER trg1;
DROP TABLE t1;
DROP TABLE t2;
include/stop_slave.inc
RESET SLAVE;
include/reset_slave.inc
Warnings:
Note 4190 RESET SLAVE is implicitly changing the value of 'Using_Gtid' from 'No' to 'Slave_Pos'
connection master;
SHOW TABLES LIKE 't_';
Tables_in_test (t_)