MySQLBackup备份数据库

KXY冲冲冲2024-03-01 12:08

环境：MySQL 8.0.36

1、安装部署

root@node5 \~# wget -c https://edelivery.oracle.com/osdc/softwareDownload?fileName=V1040085-01.zip

root@node5 \~# ll

total 22776

-rw-------. 1 root root 1066 Jan 21 14:59 anaconda-ks.cfg

-r--r--r--. 1 root root 23316009 Feb 24 18:50 V1040085-01.zip

root@node5 \~# unzip V1040085-01.zip

root@node5 \~# yum install mysql-commercial-backup-8.0.36-1.1.el8.x86_64.rpm -y

2 、配置备份管理员

mysql> create user 'mysqlbackup'@'localhost' identified by 'MySQL@123';

Query OK, 0 rows affected (0.09 sec)

mysql> grant all on *.* to 'mysqlbackup'@'localhost';

Query OK, 0 rows affected (0.03 sec)

3、 backup-to-image方式备份数据库

3.1 全量备份

root@node5 \~# mkdir /data #创建备份目录

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --backup-image=my_full_bak.mbi --backup-dir=/data/backup --show-progress --compress backup-to-image

root@node5 \~# ll /data/backup/ #查看备份后的文件

total 4408

-rw-r--r--. 1 root root 255 Feb 24 19:59 backup-my.cnf

drwxr-x---. 2 root root 4096 Feb 24 19:59 datadir

drwxr-x---. 2 root root 4096 Feb 24 19:59 meta

-rw-r-----. 1 root root 4475730 Feb 24 19:59 my_full_bak.mbi

-rw-r-----. 1 root root 19936 Feb 24 19:59 server-all.cnf

-rw-r-----. 1 root root 632 Feb 24 19:59 server-my.cnf

3.2 全量备份还原

1、检验

root@node5 \~# mysqlbackup --backup-image=/data/backup/my_full_bak.mbi list-image

#通过list-image查看备份image中的文件内容

root@node5 \~# mysqlbackup --backup-image=/data/backup/my_full_bak.mbi validate

#通过validate验证备份image的有效性

root@node5 \~# mysql -e 'drop database school' #删库

root@node5 \~# mysql -e 'show databases'

bash 复制代码 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+

2、还原image

#这两步必做

root@node5 \~# systemctl stop mysqld.service #关闭mysqld服务

root@node5 \~# rm -rf /var/lib/mysql/* #清空mysql的datadir目录

root@node5 \~# mysqlbackup --datadir=/var/lib/mysql --backup-image=/data/backup/my_full_bak.mbi --backup-dir=/data/backup/tmp --uncompress copy-back-and-apply-log

root@node5 \~# chown -R mysql.mysql /var/lib/mysql/* #更改权限

root@node5 \~# systemctl start mysqld.service

root@node5 \~# mysql -e 'select * from school.stu' #确认恢复

bash 复制代码 
+-----+---------+--------+------+------------------+
| Sno | Sname   | Ssex   | Sage | Sdept            |
+-----+---------+--------+------+------------------+
|   1 | Alice   | Female |   20 | Mathematics      |
|   2 | Bob     | Male   |   22 | Computer Science |
|   3 | Charlie | Male   |   21 | Engineering      |
|   4 | David   | Female |   19 | Literature       |
+-----+---------+--------+------+------------------+

3.2 增量备份

1、第一次增量备份

mysql> INSERT INTO stu (Sno, Sname, Ssex, Sage, Sdept) VALUES (5, 'Emma', 'Female', 20, 'Mathematics'),(6, 'Tom', 'Male', 22, 'Computer Science');

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --compress --incremental --incremental-base=dir:/data/backup --backup-dir=/data/backup/incr1 --backup-image=my_inc1_bak.mbi backup-to-image

root@node5 \~# ll /data/backup/incr1/

total 1792

-rw-r--r--. 1 root root 255 Feb 24 20:22 backup-my.cnf

drwxr-x---. 2 root root 4096 Feb 24 20:22 datadir

drwxr-x---. 2 root root 4096 Feb 24 20:22 meta

-rw-r-----. 1 root root 1796619 Feb 24 20:22 my_inc1_bak.mbi

-rw-r-----. 1 root root 19936 Feb 24 20:22 server-all.cnf

-rw-r-----. 1 root root 505 Feb 24 20:22 server-my.cnf

2、第二次增量备份

mysql> INSERT INTO stu (Sno, Sname, Ssex, Sage, Sdept) VALUES (7, 'Lily', 'Female', 21, 'Engineering'),(8, 'Jack', 'Male', 19, 'Literature');

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --compress --incremental --incremental-base=history:last_backup --backup-dir=/data/backup/incr2 --backup-image=my_inc_bak.mbi backup-to-image

#--incremental-base 可以写成history:last_backup不用写上次备份的dir，两个方法都可以

root@node5 \~# ll /data/backup/incr2/

total 1700

-rw-r--r--. 1 root root 255 Feb 24 20:28 backup-my.cnf

drwxr-x---. 2 root root 4096 Feb 24 20:28 datadir

drwxr-x---. 2 root root 4096 Feb 24 20:28 meta

-rw-r-----. 1 root root 1696167 Feb 24 20:28 my_inc_bak.mbi

-rw-r-----. 1 root root 19936 Feb 24 20:28 server-all.cnf

-rw-r-----. 1 root root 632 Feb 24 20:28 server-my.cnf

3.3 增量备份还原

root@node5 \~# mysql -e 'drop database school' #删库

root@node5 \~# mysql -e 'show databases'

bash 复制代码 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+

root@node5 \~# systemctl stop mysqld.service #关闭mysqld服务

root@node5 \~# rm -rf /var/lib/mysql/* #清空mysql的datadir目录

1、先还原完全备份

root@node5 \~# mysqlbackup --datadir=/var/lib/mysql --backup-image=/data/backup/my_full_bak.mbi --backup-dir=/data/backup/tmp1 --uncompress copy-back-and-apply-log

#注意backup-dir刚才是/data/backup/tmp，这里得换一个

2、第一次增量备份还原

root@node5 \~# mysqlbackup --backup-image=/data/backup/incr1/my_inc1_bak.mbi --backup-dir=/data/backup/incr1/tmp2 --datadir=/var/lib/mysql/ --incremental copy-back-and-apply-log

3、第二次增量备份还原

root@node5 \~# mysqlbackup --backup-image=/data/backup/incr2/my_inc_bak.mbi --backup-dir=/data/backup/incr2/tmp3 --datadir=/var/lib/mysql/ --incremental copy-back-and-apply-log

root@node5 \~# chown -R mysql.mysql /var/lib/mysql/*

root@node5 \~# systemctl start mysqld.service

root@node5 \~# mysql -e 'select * from school.stu'

bash 复制代码 
+-----+---------+--------+------+------------------+
| Sno | Sname   | Ssex   | Sage | Sdept            |
+-----+---------+--------+------+------------------+
|   1 | Alice   | Female |   20 | Mathematics      |
|   2 | Bob     | Male   |   22 | Computer Science |
|   3 | Charlie | Male   |   21 | Engineering      |
|   4 | David   | Female |   19 | Literature       |
|   5 | Emma    | Female |   20 | Mathematics      |
|   6 | Tom     | Male   |   22 | Computer Science |
|   7 | Lily    | Female |   21 | Engineering      |
|   8 | Jack    | Male   |   19 | Literature       |
+-----+---------+--------+------+------------------+

4、datafile方式备份数据库

环境：最好恢复初始环境，或只把上次备份的目录删了

4.1 完全备份

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --backup-dir=/data/backup --show-progress --compress backup

root@node5 \~# ll /data/backup/

total 36

-rw-r--r--. 1 root root 255 Feb 24 20:53 backup-my.cnf

drwxr-x---. 6 root root 4096 Feb 24 20:53 datadir

drwxr-x---. 2 root root 4096 Feb 24 20:53 meta

-rw-r-----. 1 root root 19936 Feb 24 20:53 server-all.cnf

-rw-r-----. 1 root root 632 Feb 24 20:53 server-my.cnf

4.2 完全备份恢复

root@node5 \~# mysql -e 'drop database school'

root@node5 \~# mysql -e 'show databases'

bash 复制代码 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+

root@node5 \~# systemctl restart mysqld.service

root@node5 \~# systemctl stop mysqld.service

root@node5 \~# rm -rf /var/lib/mysql/*

root@node5 \~# mysqlbackup --backup-dir=/data/backup apply-log #备份过程中产生的日志文件

root@node5 \~# mysqlbackup --datadir=/var/lib/mysql/ --backup-dir=/data/backup copy-back-and-apply-log #将备份的文件拷贝到datadir下

root@node5 \~# chown -R mysql.mysql /var/lib/mysql/*

root@node5 \~# systemctl start mysqld.service

root@node5 \~# mysql -e 'select * from school.stu'

bash 复制代码 
+-----+---------+--------+------+------------------+
| Sno | Sname   | Ssex   | Sage | Sdept            |
+-----+---------+--------+------+------------------+
|   1 | Alice   | Female |   20 | Mathematics      |
|   2 | Bob     | Male   |   22 | Computer Science |
|   3 | Charlie | Male   |   21 | Engineering      |
|   4 | David   | Female |   19 | Literature       |
+-----+---------+--------+------+------------------+

4.2 增量备份

1、第一次增量备份

mysql> INSERT INTO stu (Sno, Sname, Ssex, Sage, Sdept) VALUES (5, 'Emma', 'Female', 20, 'Mathematics'),(6, 'Tom', 'Male', 22, 'Computer Science');

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --compress --incremental --incremental-base=dir:/data/backup --incremental-backup-dir=/data/backup/incr1 backup

root@node5 \~# ll /data/backup/incr1/

total 36

-rw-r--r--. 1 root root 255 Feb 24 21:55 backup-my.cnf

drwxr-x---. 6 root root 4096 Feb 24 21:55 datadir

drwxr-x---. 2 root root 4096 Feb 24 21:55 meta

-rw-r-----. 1 root root 19936 Feb 24 21:55 server-all.cnf

-rw-r-----. 1 root root 632 Feb 24 21:55 server-my.cnf

2、第二次增量备份

mysql> INSERT INTO stu (Sno, Sname, Ssex, Sage, Sdept) VALUES (7, 'Lily', 'Female', 21, 'Engineering'),(8, 'Jack', 'Male', 19, 'Literature');

root@node5 \~# mysqlbackup --user=mysqlbackup --password=MySQL@123 --socket=/var/lib/mysql/mysql.sock --compress --incremental --incremental-base=history:last_backup --incremental-backup-dir=/data/backup/incr2 backup

root@node5 \~# ll /data/backup/incr2/

total 36

-rw-r--r--. 1 root root 255 Feb 24 21:56 backup-my.cnf

drwxr-x---. 6 root root 4096 Feb 24 21:56 datadir

drwxr-x---. 2 root root 4096 Feb 24 21:56 meta

-rw-r-----. 1 root root 19936 Feb 24 21:56 server-all.cnf

-rw-r-----. 1 root root 632 Feb 24 21:56 server-my.cnf

4.3 增量备份还原

root@node5 \~# mysql -e 'drop database school' #删库

root@node5 \~# mysql -e 'show databases'

bash 复制代码 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+

root@node5 \~# systemctl stop mysqld.service #关闭mysqld服务

root@node5 \~# rm -rf /var/lib/mysql/* #清空mysql的datadir目录

root@node5 \~# mysqlbackup --backup-dir=/data/backup apply-log #备份过程中产生的日志文件

root@node5 \~# mysqlbackup --incremental-backup-dir=/data/backup/incr1 --backup-dir=/data/backup/ apply-incremental-backup #增备apply-incremental-backup

root@node5 \~# mysqlbackup --incremental-backup-dir=/data/backup/incr2 --backup-dir=/data/backup/ apply-incremental-backup

root@node5 \~# mysqlbackup --datadir=/var/lib/mysql --backup-dir=/data/backup/ copy-back-and-apply-log #将几次备份搞得文件拷到datadir

root@node5 \~# chown -R mysql.mysql /var/lib/mysql/*

root@node5 \~# systemctl start mysqld.service

root@node5 \~# mysql -e 'select * from school.stu'

bash 复制代码 
+-----+---------+--------+------+------------------+
| Sno | Sname   | Ssex   | Sage | Sdept            |
+-----+---------+--------+------+------------------+
|   1 | Alice   | Female |   20 | Mathematics      |
|   2 | Bob     | Male   |   22 | Computer Science |
|   3 | Charlie | Male   |   21 | Engineering      |
|   4 | David   | Female |   19 | Literature       |
|   5 | Emma    | Female |   20 | Mathematics      |
|   6 | Tom     | Male   |   22 | Computer Science |
|   7 | Lily    | Female |   21 | Engineering      |
|   8 | Jack    | Male   |   19 | Literature       |
+-----+---------+--------+------+------------------+
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