MySQL备份之xtrabackup

Posted 2021-02-06

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1.xtrabackup安装

2.xtrabackup原理

3.xtrabackup命令详解

1)xtrabackup安装

wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.12/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.12-1.el7.x86_64.rpm

yum -y localinstall percona-xtrabackup-24-2.4.12-1.el7.x86_64.rpm

2)xtrabackup原理

2.1)xtrabackup备份流程

start xtrabackup_log 启动innobackupex；

　　　　　　　　　　开启xtrabackup线程

copy redo log 开启os_thread_create 线程拷贝 redo log文件

copy ibd;ibdata1 开启os_thread_create 拷贝idb data文件

　　　　　　　　　　等待拷贝完idb data文件后下发一个flush tables with read lock锁

flush tables with read lock

copy .FRM;MYD;MYI;misc files 拷贝文件frm;myd,myi,misc文件

show master status　　　　　　　show master status输出get binary log position and so on;

stop copy redo log　　　　　　　停止拷贝redo log后 unlock table；

unlock table

stop and copy xtrabackup_log

2.2)观察方法

innobackupex -S /tmp/mysql3306.sock -uroot -p666666 /data/backup/ 2>&1 |tee 1.log

3)xtrabackup命令详解

3.1)备份

innobackupex -S /tmp/mysql3306.sock -uroot -p666666 --no-timestamp /data/backup/db3306-`date +%F`

3.2）恢复

innobackupex --apply-log /data/backup/db3306-2019-01-28

service mysqld stop

cd /data/mysql/mysql3306/

mv data data_`date +%F`

mkdir data

提示：(innodb_log_group_home_dir =./ 需要删掉)

innobackupex --copy-back /data/backup/db3306-2019-01-28/

chown -R mysql:mysql /data/mysql/mysql3306/data

3.3)加密备份

openssl rand -base64 24

innobackupex --encrypt=AES256 --encrypt-key=1CaXAN1nI+MMhSgpVLuENBM9rq3OLKpO -S /tmp/mysql3306.sock -uroot -p666666 --no-timestamp /data/backup/db3306-`date +%F_%T`

3.4）恢复

innobacupex --encrypt=AES256 --encrypt-key=1CaXAN1nI+MMhSgpVLuENBM9rq3OLKpO /data/backup/db3306-2019-01-25_09:46:52

innobackupex --apply-log /data/backup/db3306-2019-01-25_09:46:52

service mysqld stop

cd /data/mysql/mysql3306/

mv data data_`date +%F`

mkdir data

提示：(innodb_log_group_home_dir =./ 需要删掉)

innobackupex --copy-back /data/backup/db3306-2019-01-28/

chown -R mysql:mysql /data/mysql/mysql3306/data

3.5）远程备份

ssh-keygen -t rsa

ssh-copy-id -i /root/.ssh/id_rsa.pub [email protected]

innobackupex -uroot -p666666 --no-timestamp -S /tmp/mysql3306.sock --stream=tar ./ |ssh -p 22 192.168.20.212 "gzip - >/data/backup/db3306_`date +%F_%T`.tat.gz"（测试：无法解压可能跟版本有关）