MySQL 5.7 基于GTID创建运行主库的从库

GTID innobackupex备份实现主从同步

• 1)master备份

  innobackupex --defaults-file=/etc/my.cnf --user=root --password=123456 --parallel=4 /backup

• 2)拷贝到slave上，并prepare和copy backup

  innobackupex --defaults-file=/etc/my.cnf --apply-log --user=root --password=123456 --port=3306 /backup/2018-04-23_17-04-55
  rm -rf /mysqlData/data/*
  rm -rf /mysqlData/logs/undolog/*
  innobackupex --defaults-file=/etc/my.cnf --copy-back --user=root --password=123456 --port=3306 /backup/2018-04-23_17-04-55
  chown -R mysql:mysql /mysqlData/
  /etc/init.d/mysqld start

• 3)从备份目录的文件xtrabackup_info中获取GTID信息

  binlog_pos = filename 'binlog.000176', position '38885756', GTID of the last change '73c029dc-2034-11e8-90a5-005056a365b6:1-594908,
  856d79f8-2038-11e8-b511-005056a330bb:1-3,
  b658767f-2044-11e8-951f-005056a330bb:1-17477471'

• 4)master中的GTID信息

  root@slave01 10:20:  [(none)]> show master status\G
  *************************** 1. row ***************************
           File: binlog.000176
       Position: 159643240
   Binlog_Do_DB: 
   Binlog_Ignore_DB: 
  Executed_Gtid_Set: 73c029dc-2034-11e8-90a5-005056a365b6:1-594908,
  856d79f8-2038-11e8-b511-005056a330bb:1-3,
  b658767f-2044-11e8-951f-005056a330bb:1-17577902
  1 row in set (0.00 sec)

• 5)设置GTID

  reset slave all;
  reset master;
  SET @MYSQLDUMP_TEMP_LOG_BIN = @@SESSION.SQL_LOG_BIN;
  SET @@SESSION.SQL_LOG_BIN= 0;
  SET @@GLOBAL.GTID_PURGED='73c029dc-2034-11e8-90a5-005056a365b6:1-594908,856d79f8-2038-11e8-b511-005056a330bb:1-3,b658767f-2044-11e8-951f-005056a330bb:1-17477471';
  SET @@SESSION.SQL_LOG_BIN = @MYSQLDUMP_TEMP_LOG_BIN;

• 6)设置主从命令并启动复制
  ```
  CHANGE MASTER TO
  MASTER_HOST='172.16.3.153',
  MASTER_PORT=3306,
  MASTER_USER='repl',
  MASTER_PASSWORD='Rep12#3@',
  master_auto_position=1;

start slave;

- 7)查看从库的信息master信息

root@slave02 10:24: [(none)]> show master status\G
*************************** 1. row ***************************
File: binlog.000001
Position: 4936475
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set: 73c029dc-2034-11e8-90a5-005056a365b6:1-594908,
856d79f8-2038-11e8-b511-005056a330bb:1-3,
b658767f-2044-11e8-951f-005056a330bb:1-17480536
1 row in set (0.00 sec)
```