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分类: MySQL

mysql版本是5.7.17

操作系统是centos 7

mysql数据目录:/alidata1/mysql

mysql备份目录:/alidata1/backup/full_mysql 


在master及slave机器安装xtrabackup软件
  1. [root@iz2ze6jo3o3bqbcongnypqz innobackupex]# rpm -ivh percona-xtrabackup-24-2.4.9-1.el7.x86_64.rpm
  2. warning: percona-xtrabackup-24-2.4.9-1.el7.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
  3. error: Failed dependencies:
  4. libev.so.4()(64bit) is needed by percona-xtrabackup-24-2.4.9-1.el7.x86_64
  5. perl(DBD::mysql) is needed by percona-xtrabackup-24-2.4.9-1.el7.x86_64
  6. perl(Digest::MD5) is needed by percona-xtrabackup-24-2.4.9-1.el7.x86_64
  7. rsync is needed by percona-xtrabackup-24-2.4.9-1.el7.x86_64
libev.so.4()的解决到下面这里下载操作系统对应的版本,本例下载的是libev-4.15-7.el7.x86_64.rpm

  1. http://rpmfind.net/linux/rpm2html/search.php?query=libev.so.4%28%29%2864bit%29&submit=Search+...&system=&arch=
perl(DBD::mysql)和perl(Digest::MD5),需要安装mysql-community-libs-compat-5.7.17-1.el7.x86_64.rpm,在安装包里找到即可

在master机器操作

1、在数据库创建备份账号

  1. CREATE USER xtrabk@'localhost' IDENTIFIED BY 'onlyxtrabk!@#$';
  2. GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT,Process ON *.* TO xtrabk@'localhost';
  3. FLUSH PRIVILEGES;
2、备份主库


  1. innobackupex --defaults-file=/etc/my.cnf --user=xtrabk --password='onlyxtrabk!@#$' --parallel=4 /alidata1/backup/full_mysql --no-timestamp

在slave机器操作

1、停止mysql,删除或者重命名Mysql数据目录

  1. systemctl stop mysqld.service
  2. rm -rf /alidata1/mysql/data
  3. rm -rf /alidata1/mysql/redolog
2、应用日志及数据库还原
  1. innobackupex --defaults-file=/etc/my.cnf --apply-log /alidata1/backup/full_mysql


  2. innobackupex --defaults-file=/etc/my.cnf --copy-back /alidata1/backup/full_mysql

3、修改数据目录的宿主权限

  1. chown -R mysql:mysql /alidata1/mysql

4、启动mysql

  1. systemctl start mysqld.service
5.过滤掉已执行过的gtid



  1. cat /alidata1/backup/full_mysql/xtrabackup_info |grep binlog_pos
  2. [root@iz2ze6jo3o3bqbcongnyppz full_mysql]# cat /alidata1/backup/full_mysql/xtrabackup_info |grep binlog_pos
  3. binlog_pos = filename 'bin.000131', position '615481029', GTID of the last change 'c9c73c70-c089-11e7-8544-00163e0ad76e:1-107089934'
6.查看slave已执行的gtid是否为空,如果不为空,需要执行reset MASTER进行清理,否则无法设置gtid。



  1. mysql> show master status \G;
  2. *************************** 1. row ***************************
  3.              File: bin.000001
  4.          Position: 154
  5.      Binlog_Do_DB:
  6.  Binlog_Ignore_DB:
  7. Executed_Gtid_Set: c9c73c70-c089-11e7-8544-00163e0ad76e:1-106016597
  8. 1 row in set (0.00 sec)
7.执行reset master

8.执行GTID_PURGED

  1. SET @MYSQLDUMP_TEMP_LOG_BIN = @@SESSION.SQL_LOG_BIN;
  2. SET @@SESSION.SQL_LOG_BIN= 0;
  3. SET @@GLOBAL.GTID_PURGED='c9c73c70-c089-11e7-8544-00163e0ad76e:1-107089934';
  4. SET @@SESSION.SQL_LOG_BIN = @MYSQLDUMP_TEMP_LOG_BIN;
9.change master



  1. change master to
  2. master_host='192.168.2.71',
  3. master_port=3306,
  4. master_user='repl',
  5. master_password='REPLsafe!@#$71',
  6. MASTER_AUTO_POSITION = 1;
10. start slave ;

11.show slave status\G;
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