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://www.landui.com/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

1. innobackupex --defaults-file

=

/

1. etc

/

1. my

.

1. cnf --copy-back

/

1. alidata1

/

1. backup

/

1. 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;