innobackupex增量备份与恢复

Posted 2021-01-16

下载：Xtrabackup

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https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.8/binary/redhat/7/x86_64/Percona-XtraBackup-2.4.8-r97330f7-el7-x86_64-bundle.tar

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解压，yum安装

tar -xvf Percona-XtraBackup-2.4.8-r97330f7-el7-x86_64-bundle.tar
yum install percona-xtrabackup-24-2.4.8-1.el7.x86_64.rpm

完整备份

innobackupex –user=root –password=123456 –no-timestamp /backup/mysql/full

增加数据库中的数据

增加一个数据库db1, 并在db1中建立表t1(表的引擎为innodb),插入数据

MariaDB [(none)]> create database if not exists db1;
MariaDB [(none)]> use db1;
MariaDB [db1]> create table t1(id int,name varchar(20))engine=innodb;
MariaDB [db1]> insert into t1 values(1,‘aa‘);

增量备份第一次

[[email protected] ~]# innobackupex --user=root --password=123456 --no-timestamp --incremental-basedir=/backup/mysql/full --incremental /backup/mysql/01

增加数据库中的数据

mysql -uroot -p123456 -e "insert into db1.t1(id,name)values(2,‘100‘);"

增量备份第二次

[[email protected] ~]# innobackupex --user=root --password=123456 --no-timestamp --incremental-basedir=/backup/mysql/01 --incremental /backup/mysql/02

模拟数据丢失，删除数据库中的所有内容

cd /var/lib/mysql/
rm -rf *

恢复完整备份

[[email protected] mysql]# innobackupex --user=root --password=123456 --apply-log --redo-only /backup/mysql/full/

恢复第一次增量备份

[[email protected] mysql]# innobackupex --user=root --password=123456 --apply-log --redo-only /backup/mysql/full/ --incremental-dir=/backup/mysql/01

恢复第二次增量备份

[[email protected] mysql]# innobackupex --user=root --password=123456 --apply-log /backup/mysql/full/ --incremental-dir=/backup/mysql/02

将合并完的数据整体做一次apply-log

[[email protected] mysql]# innobackupex --user=root --password=123456 --copy-back /backup/mysql/full/

设置权限

[[email protected] mysql]# chown -R mysql.mysql /var/lib/mysql/

重启，看是否恢复成功

[[email protected] mysql]# systemctl restart mariadb
[[email protected] mysql]# mysql -uroot -p123456 -e "select * from db1.t1;"
+------+------+
| id   | name |
+------+------+
|    1 | aa   |
|    2 | 100  |
+------+------+