MySQL备份：mylvmbackup介绍与使用

来源：互联网发布：快餐店收银系统 php 编辑：程序博客网时间：2024/06/05 22:56

需要的依赖库
Config::IniFiles
MIME::Lite
DBD::mysql
DBI
Sys::Syslog
建议使用CPAN安装，多快好省

首先获得全局读锁，接着将缓存中数据写到磁盘，然后执行LVM快照，最后解锁、以下是我采集的一个主要过程

20131105 13:51:17 Info: Connecting to database...20131105 13:51:17 Info: Flushing tables with read lock...20131105 13:51:17 Info: Running: lvcreate -s --size=1G --name=mysql_snapshot /dev/vg/mysql20131105 13:51:18 Info: Unlocking tables...20131105 13:51:18 Info: Disconnecting from database...20131105 13:51:18 Info: Running: mount -o rw /dev/vg/mysql_snapshot /var/tmp/mylvmbackup/mnt/backup20131105 13:51:18 Info: Copying /tmp/mylvmbackup-backup-20131105_135117_mysql-8aDBvc.pos to /var/tmp/mylvmbackup/mnt/backup-pos/backup-20131105_135117_mysql.pos...20131105 13:51:18 Info: Copying /etc/my.cnf to /var/tmp/mylvmbackup/mnt/backup-pos/backup-20131105_135117_mysql_my.cnf...20131105 13:51:18 Info: Taking actual backup...20131105 13:51:18 Info: Creating tar archive /var/tmp/mylvmbackup/backup/backup-20131105_135117_mysql.tar.gz20131105 13:53:34 Info: Running: umount /var/tmp/mylvmbackup/mnt/backup20131105 13:53:34 Info: LVM Usage stats:20131105 13:53:34 Info:   LV             VG   Attr   LSize Origin Snap%  Move Log Copy%  Convert20131105 13:53:34 Info:   mysql_snapshot vg   swi-a- 1.00G mysql    0.2020131105 13:53:34 Info: Running: lvremove -f /dev/vg/mysql_snapshot

整个过程执行完后，只留下backup-20131105_135117_mysql.tar.gz，该tar包里面含二进制日志坐标、my.cnf及mysql所有文件

该工具也有邮件告警的功能，以下是我的配置文件邮件告警部分
# cat /etc/mylvmbackup.conf | grep mail
mail_report_on=always
mail_from=root@localhost
mail_to=645522734@qq.com
mail_subject=mylvmbackup report for localhost
注释
--mail_report_on：取值{never,always,errors},其中never为默认值，always表示总是发邮件，errors只在出错时发

更多信息，移步这里

参考资料：
http://www.lenzg.net/mylvmbackup/

By 迦夜

2013-11-5

Good Luck！