PXB初始化从库，需要跳过多个事务如何解决(使用GTID搭建从库)？

问题：PXB初始化从库，需要跳过多个事务如何解决(使用GTID搭建从库)？

解决方案：

可以批量来跳过事务，关键在于找到最后需要的跳过的事务.
主库使用PXB全备前，记录主库GTID，从库使用PXB恢复后跳过事务到前面记录的GTID

主库
记录PXB全备前GTID

mysql[(none)]> show master status\G;
*************************** 1. row ***************************
             File: lissen-mha-master-bin.000002
         Position: 3534
     Binlog_Do_DB: 
 Binlog_Ignore_DB: mysql,information_schema,performance_schema,sys
Executed_Gtid_Set: e48b6f50-44e3-11ec-910d-0242ac110002:1-15
1 row in set (0.00 sec)

ERROR: 
No query specified

主库全备

xtrabackup -uroot -proot -H192.168.59.3 -P33131 --backup --target-dir=/pxb_bak/full
scp -r * root@192.168.68.132:/pxb_bak/full/

创建相关对象

create database db3 charset utf8mb4;
use db3;
create table t1(id int,name varchar(20)); 
insert into t1 values(1,'a'),(2,'b'),(3,'c');

配置从库并进行初始化

xtrabackup --prepare --target-dir=/pxb_bak/full
systemctl stop systemctl
mv /usr/local/mysql/data /usr/local/mysql/data_bak
xtrabackup --copy-back --target-dir=/pxb_bak/full --datadir=/usr/local/mysql/data
chown -R mysql.mysql /usr/local/mysql/data
systemctl start mysqld

change master to 
master_host = '192.168.68.131',
master_port = 3306,
master_user = 'repl',
master_password = 'repl',
master_auto_position = 1;

计算跳过的GTID

根据前面记录的主库PXB全备前GTID为15
所以要跳过的事务为2-15

批量跳过事务脚本

cat skip_gtid.sh

#!/bin/bash

for i in $(seq 2 15)
do
	mysql -uroot -proot -h192.168.68.132 -P3306 -e "set gtid_next = 'e48b6f50-44e3-11ec-910d-0242ac110002:$i';begin;commit;"
done
mysql -uroot -proot -h192.168.68.132 -P3306 -e "set gtid_next = 'automatic';"

-- mysql -e 中执行多条命令以;分开
mysql -e ";;;"

跳过事务后启动slave sql_thread

               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 573333131
                  Master_UUID: e48b6f50-44e3-11ec-910d-0242ac110002
             Master_Info_File: /usr/local/mysql/data/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: e48b6f50-44e3-11ec-910d-0242ac110002:1-62
            Executed_Gtid_Set: e48b6f50-44e3-11ec-910d-0242ac110002:1-62
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)