mysql使用xtrbackup+relaylog增量恢复注意事项

[mysql]
password=root@1234
[mysqld]
server_id=1
log_bin
gtid_mode=1
binlog_format=row
basedir=/usr/local/mysql
datadir=/home/mysql/data

[root@mysql57-1 tmp]# xtrabackup --user=root --password=root@1234 --socket=/tmp/mysql.sock --backup --target-dir=/tmp/bak
....
230508 15:48:12 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
xtrabackup: The latest check point (for incremental): '2568864'
xtrabackup: Stopping log copying thread.
.230508 15:48:12 >> log scanned up to (2568873)
230508 15:48:13 Executing UNLOCK TABLES
230508 15:48:13 All tables unlocked
230508 15:48:13 [00] Copying ib_buffer_pool to /tmp/bak/ib_buffer_pool
230508 15:48:13 [00]        ...done
230508 15:48:13 Backup created in directory '/tmp/bak/'
MySQL binlog position: filename 'mysql57-1-bin.000001', position '154'
230508 15:48:13 [00] Writing /tmp/bak/backup-my.cnf
230508 15:48:13 [00]        ...done
230508 15:48:13 [00] Writing /tmp/bak/xtrabackup_info
230508 15:48:13 [00]        ...done
xtrabackup: Transaction log of lsn (2568864) to (2568873) was copied.
230508 15:48:13 completed OK!

[root@mysql57-1 bak]# xtrabackup --prepare --target-dir=/tmp/bak
InnoDB: 96 redo rollback segment(s) found. 1 redo rollback segment(s) are active.
InnoDB: 32 non-redo rollback segment(s) are active.
InnoDB: 5.7.40 started; log sequence number 2569237
xtrabackup: starting shutdown with innodb_fast_shutdown = 1
InnoDB: FTS optimize thread exiting.
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number 2569256
230511 16:54:37 completed OK!

cp -r /tmp/bak /home/mysql/data
chown -R mysql:mysql /home/mysql/data

vi /etc/my.cnf
server_id=2

CHANGE MASTER TO master_host='1',master_password='1',master_user='1',master_log_file='1',master_log_pos=4;

cp mysql57-1-bin.000001 /home/mysql/data/mysql57-1-relay-bin.000001
chown mysql:mysql /home/mysql/data/mysql57-1-relay-bin.00000*

vi mysql57-1-relay-bin.index
./mysql57-1-relay-bin.000001

/etc/init.d/mysql restart

mysql> show tables;
+---------------+
| Tables_in_ddd |
+---------------+
| ddl_test      |
| dml_test      |
| pitr          |
| test          |
| ttt           |
+---------------+
5 rows in set (0.00 sec)
mysql> select * from test;
+---+---------------------+
| x | y                   |
+---+---------------------+
| 1 | 2023-05-08 15:51:37 |
| 2 | 2023-05-08 15:51:39 |
| 3 | 2023-05-08 15:51:42 |
| 4 | 2023-05-08 15:51:45 |
| 5 | 2023-05-08 15:51:49 |
+---+---------------------+
5 rows in set (0.00 sec)
mysql> select * from dml_test;
Empty set (0.00 sec)

cp mysql57-1-bin.000002 /home/mysql /data/mysql57-1-relay-bin.000002
chown mysql:mysql /data/mysql57-1-relay-bin.000002

vi mysql57-1-relay-bin.index
./mysql57-1-relay-bin.000002

/etc/init.d/mysql restart

mysql> use ddd;
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
mysql> show tables;
+---------------+
| Tables_in_ddd |
+---------------+
| ddl_test      |
| dml_test      |
| pitr          |
| test          |
| ttt           |
+---------------+
5 rows in set (0.00 sec)
mysql> select * from dml_test;
+------+------+
| x    | y    |
+------+------+
|    1 | 123  |
|    1 | qwe  |
|    1 | ttt  |
+------+------+
3 rows in set (0.00 sec)

reset slave all;