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6.xtrabackup实现全量+增量+binlog恢复库

2022-07-31 02:01:01 阅读：168 来源： 互联网

标签：binlog -- root xtrabackup 全量 mysql NULL backup

6.xtrabackup实现全量+增量+binlog恢复库

利用xtrabackup8.0 完全，增量备份及还原MySQL8.0

1 备份过程

1）完全备份：

[root@CentOS8 ~]# yum install -y percona-xtrabackup-80-8.0.26-18.1.el8.x86_64.rpm

[root@centos8 ~]#mkdir /backup/

[root@centos8 ~]#xtrabackup -uroot -pmagedu --backup --target-dir=/backup/base

[root@centos8 ~]# du -sh /backup/base/

71M /backup/base/

2）第一次修改数据

[root@CentOS8 backup]# mysql -uroot -pMmagedu0!

(root@localhost) [(none)]> show databases;

+--------------------+

| Database |

+--------------------+

| hellodb |

| information_schema |

| mysql |

| performance_schema |

| sys |

+--------------------+

5 rows in set (0.00 sec)

(root@localhost) [(none)]> use hellodb;

(root@localhost) [hellodb]> show tables;

+-------------------+

| Tables_in_hellodb |

+-------------------+

| classes |

| coc |

| courses |

| scores |

| students |

| teachers |

| toc |

+-------------------+

7 rows in set (0.00 sec)

(root@localhost) [hellodb]> select * from students;

+-------+---------------+-----+--------+---------+-----------+

+-------+---------------+-----+--------+---------+-----------+

| 1 | Shi Zhongyu | 22 | M | 2 | 3 |

| 2 | Shi Potian | 22 | M | 1 | 7 |

| 3 | Xie Yanke | 53 | M | 2 | 16 |

| 4 | Ding Dian | 32 | M | 4 | 4 |

| 5 | Yu Yutong | 26 | M | 3 | 1 |

| 6 | Shi Qing | 46 | M | 5 | NULL |

| 7 | Xi Ren | 19 | F | 3 | NULL |

| 8 | Lin Daiyu | 17 | F | 7 | NULL |

| 9 | Ren Yingying | 20 | F | 6 | NULL |

| 10 | Yue Lingshan | 19 | F | 3 | NULL |

| 11 | Yuan Chengzhi | 23 | M | 6 | NULL |

| 12 | Wen Qingqing | 19 | F | 1 | NULL |

| 13 | Tian Boguang | 33 | M | 2 | NULL |

| 14 | Lu Wushuang | 17 | F | 3 | NULL |

| 15 | Duan Yu | 19 | M | 4 | NULL |

| 16 | Xu Zhu | 21 | M | 1 | NULL |

| 17 | Lin Chong | 25 | M | 4 | NULL |

| 18 | Hua Rong | 23 | M | 7 | NULL |

| 19 | Xue Baochai | 18 | F | 6 | NULL |

| 20 | Diao Chan | 19 | F | 7 | NULL |

| 21 | Huang Yueying | 22 | F | 6 | NULL |

| 22 | Xiao Qiao | 20 | F | 1 | NULL |

| 23 | Ma Chao | 23 | M | 4 | NULL |

| 24 | Xu Xian | 27 | M | NULL | NULL |

| 25 | Sun Dasheng | 100 | M | NULL | NULL |

+-------+---------------+-----+--------+---------+-----------+

(root@localhost) [hellodb]> insert students (name,age) values ('zhang wuji',18);

Query OK, 1 row affected (0.01 sec)

(root@localhost) [hellodb]> select * from students where name='zhang wuji';

+-------+------------+-----+--------+---------+-----------+

+-------+------------+-----+--------+---------+-----------+

| 26 | zhang wuji | 18 | F | NULL | NULL |

+-------+------------+-----+--------+---------+-----------+

3）第一次增量备份

[root@centos8 ~]#xtrabackup -uroot -pmagedu --backup --target-dir=/backup/inc1 -- incremental-basedir=/backup/base

[root@CentOS8 backup]# ls /backup/

base inc1

[root@centos8 ~]#cat /backup/inc1/xtrabackup_info

[root@CentOS8 inc1]# cat xtrabackup_info

uuid = a0bce652-0f2c-11ed-8609-000c298fbddd

name =

tool_name = xtrabackup

tool_command = -uroot -pMmagedu0! --backup --target-dir=/backup/inc1 --incremental-basedir=/backup/base

tool_version = 8.0.26-18

ibbackup_version = 8.0.26-18

server_version = 8.0.26

start_time = 2022-07-29 18:53:04

end_time = 2022-07-29 18:53:06

lock_time = 0

binlog_pos = filename 'binlog.000003', position '156'

innodb_from_lsn = 18242993

innodb_to_lsn = 18243411

partial = N

incremental = Y

format = file

compressed = N

encrypted = N

[root@centos8 ~]#cat /backup/inc1/xtrabackup_checkpoints

[root@centos8 ~]#cat /backup/inc1/xtrabackup_binlog_info

4）第二次修改数据

[root@CentOS8 inc1]# mysql -uroot -pMmagedu0!

(root@localhost) [(none)]> use hellodb;

(root@localhost) [hellodb]> insert into students (name,age) values ('zhao miin',17);

(root@localhost) [hellodb]> select * from students where name='zhao min';

+-------+----------+-----+--------+---------+-----------+

+-------+----------+-----+--------+---------+-----------+

| 27 | zhao min | 17 | F | NULL | NULL |

+-------+----------+-----+--------+---------+-----------+

5）第二次增量

[root@centos8 ~]#xtrabackup -uroot -pmagedu --backup --target-dir=/backup/inc2 --incremental-basedir=/backup/inc1

[root@CentOS8 inc1]# ls /backup/

base inc1 inc2

#查看xtrabackup相关文件

root@centos8 ~]#cat /backup/inc2/xtrabackup_info

[root@CentOS8 inc1]# cat /backup/inc2/xtrabackup_info

uuid = c5bc696a-0f2d-11ed-8609-000c298fbddd

name =

tool_name = xtrabackup

tool_command = -uroot -pMmagedu0! --backup --target-dir=/backup/inc2 --incremental-basedir=/backup/inc1

tool_version = 8.0.26-18

ibbackup_version = 8.0.26-18

server_version = 8.0.26

start_time = 2022-07-29 19:01:16

end_time = 2022-07-29 19:01:18

lock_time = 0

binlog_pos = filename 'binlog.000004', position '156'

innodb_from_lsn = 18243411

innodb_to_lsn = 18243817

partial = N

incremental = Y

format = file

compressed = N

encrypted = N

[root@centos8 ~]#cat /backup/inc2/xtrabackup_binlog_info

6）[root@CentOS8 inc1]# scp -r /backup/* 10.0.0.18:/backup/

root@10.0.0.18's password:

xtrabackup_logfile 100% 2560 1.1MB/s 00:00

ibdata1 100% 12MB 28.7MB/s 00:00

sys_config.ibd 100% 112KB 16.8MB/s 00:00

classes.ibd 100% 112KB 6.6MB/s 00:00

coc.ibd 100% 112KB 28.0MB/s 00:00

courses.ibd 100% 112KB 28.8MB/s 00:00

scores.ibd 100% 112KB 28.1MB/s 00:00

students.ibd 100% 112KB 30.1MB/s 00:00

teachers.ibd 100% 112KB 25.6MB/s 00:00

toc.ibd 100% 112KB 23.3MB/s 00:00

#备份过程生成三个备份目录 /backup/{base，inc1，inc2}

[root@CentOS8 ~]# hostname -I

10.0.0.18

[root@CentOS8 ~]# ls /backup/

base inc1 inc2

7) 模拟数据库破坏

Yum安装数据库目录在/var/lib/mysql中

[root@CentOS8 inc1]# ls /var/lib/mysql

auto.cnf '#ib_16384_1.dblwr' mysqlx.sock

binlog.000001 ib_buffer_pool mysqlx.sock.lock

binlog.000002 ibdata1 performance_schema

binlog.000003 ib_logfile0 private_key.pem

binlog.000004 ib_logfile1 public_key.pem

binlog.index ibtmp1 server-cert.pem

ca-key.pem '#innodb_temp' server-key.pem

ca.pem mysql sys

client-cert.pem mysql.ibd undo_001

client-key.pem mysql.sock undo_002

hellodb mysql.sock.lock

'#ib_16384_0.dblwr' mysql_upgrade_info

[root@CentOS8 inc1]# mv /var/lib/mysql /usr/local/

[root@CentOS8 inc1]# ls /var/lib/mysql

ls: cannot access '/var/lib/mysql': No such file or directory

[root@CentOS8 backup]# systemctl restart mysql

Failed to restart mysql.service: Unit mysql.service not found.

[root@CentOS8 backup]# mysql -uroot -pMmage0!

mysql: [Warning] Using a password on the command line interface can be insecure.

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

2还原过程

1）预准备完全备份，此选项--apply-log-only 阻止回滚未完成的事务

[root@centos8 ~]#xtrabackup --prepare --apply-log-only --target-dir=/backup/base

2）合并第1次增量备份到完全备份

[root@centos8 ~]#xtrabackup --prepare --apply-log-only --target-dir=/backup/base --incremental-dir=/backup/inc1

3）合并第2次增量备份到完全备份：最后一次还原不需要加选项--apply-log-only

[root@centos8 ~]#xtrabackup --prepare --target-dir=/backup/base --incremental-

dir=/backup/inc2

4）复制到数据库目录，注意数据库目录必须为空，MySQL服务不能启动

[root@centos8 ~]#xtrabackup --copy-back --target-dir=/backup/base

5）还原属性：

[root@centos8 ~]#chown -R mysql:mysql /var/lib/mysql

6）启动服务：

[root@centos8 ~]#service mysqld start

可以看到数据库修好，能重新登录

[root@CentOS8 ~]# mysql -uroot -pMmagedu0!

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 8.0.26 Source distribution

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

(root@localhost) [(none)]> use hellodb;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

(root@localhost) [hellodb]> select * from st

status students.ClassID students.StuID

students students.Gender students.TeacherID

students.Age students.Name

(root@localhost) [hellodb]> select * from students;

+-------+---------------+-----+--------+---------+-----------+

+-------+---------------+-----+--------+---------+-----------+

| 1 | Shi Zhongyu | 22 | M | 2 | 3 |

| 2 | Shi Potian | 22 | M | 1 | 7 |

标签：binlog,--,root,xtrabackup,全量,mysql,NULL,backup
来源： https://www.cnblogs.com/biaoming534/p/16536321.html

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6.xtrabackup实现全量+增量+binlog恢复库