mysql自动备份策略

目标：每7天做一个完整备份，每天做一份binlog日志，第二周将之前的备份删除并产生新的完整备份和binlog日志，备份要求每天2:00自动完成
mysql 版本：mysql5.5

1.开启binlog
vim /etc/my.cnf
[mysqld]
log-bin=binlog

2.重启mysqld服务
/etc/init.d/mysqld restart

验证binlog开启成功
/usr/local/mysql/var/下会出现binlog.0000001,binlog.index文件

3.刷新日志产生新的binlog
mysql -u root -p flush-logs

4.删除前一时期的日志除了最后一个
rm -f `sed -n '$!p' binlog.index`

5.产生新的完整备份
mysqldum --all-databases -u root -p

6.删除最后一个日志
rm -f `sed -n '$p' binlog.index`

7.产生新的增量备份
mysqladmin -u root -p flush-logs

8.删除最后一份日志
rm -f `sed -n '$!p' binlog.index`

9.将新的日志信息重新写入binlog.index
sed -n '$p' binlog.index >tmp
cat tmp >binlog.index

操作步骤：

一.每天凌晨零点一分产生一份binlog,用crontab实现
crontab -e
01 00 * * *   mysqladmin -u root -pdbpass flush-logs

二.用脚本实现每周产生一个新的完整备份，并将原来的增量备份全删除
1.vim mysql_bak.sh

#!/bin/bash
#This script will backup mysql database

MYSQL_DIR=/usr/local/mysql

#delete old binlogs except the last one
rm -f `sed -n '$!p' $MYSQL_DIR/data/binlog.index`

#backup db 
mysqldump -u root -pdbpass dbname >/var/backup/dbname_`date +"%Y%m%d"`.sql

#delete the last binlog
rm -f `sed -n '$p' $MYSQL_DIR/data/binlog.index`

#create new binlog by flush-logs
mysqladmin -u root -pdbpass flush-logs

#write new binlog into binlog.index
sed -n '$p' $MYSQL_DIR/data/binlog.index >/tmp/tmp.index
cat /tmp/tmp.index >$MYSQL_DIR/data/binlog.index

 

2.mv mysql_bak.sh /usr/local/mysql/bin/

 

3.crontab实现每周日备份
crontab -e
00 02 * * 7     /usr/local/mysql/bin/mysql_bak.sh