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如何才能实现MySQL的自动备份

Posted on 2007-05-11 16:54 semovy 阅读(393) 评论(0)  编辑  收藏 所属分类: My SQL数据库方面
MySQL自动备份是非常关键的,特别是对于DBA来说。这里主要用代码来说明这个问题,希望对各位有所帮助。可以将这个脚本放进crontab,每天凌晨执行一次,自动备份。

这个脚本每天最多只执行一次,而且只保留最近五天的备份在服务器上。

代码:

#!/bin/bash
#This is a ShellScript For Auto DB Backup
#Powered by ASPbiz
#2004-09

#Setting
#设置数据库名,数据库登录名,密码,备份路径,日志路径,数据文件位置,以及备份方式
#默认情况下备份方式是tar,还可以是mysqldump,mysqldotcopy
#默认情况下,用root(空)登录mysql数据库,备份至/root/dbxxxxx.tgz
DBName=mysql
DBUser=root
DBPasswd=
BackupPath=/root/
LogFile=/root/db.log
DBPath=/var/lib/mysql/
#BackupMethod=mysqldump
#BackupMethod=mysqlhotcopy
#BackupMethod=tar
#Setting End


NewFile="¥BackupPath"db¥(date +%y%m%d).tgz
DumpFile="¥BackupPath"db¥(date +%y%m%d)
OldFile="¥BackupPath"db¥(date +%y%m%d --date='5 days ago').tgz

echo "-------------------------------------------" >> ¥LogFile
echo ¥(date +"%y-%m-%d %H:%M:%S") >> ¥LogFile
echo "--------------------------" >> ¥LogFile
#Delete Old File
if [ -f ¥OldFile ]
then
rm -f ¥OldFile >> ¥LogFile 2>&1
echo "[¥OldFile]Delete Old File Success!" >> ¥LogFile
else
echo "[¥OldFile]No Old Backup File!" >> ¥LogFile
fi

if [ -f ¥NewFile ]
then
echo "[¥NewFile]The Backup File is exists,Can't Backup!" >> ¥LogFile
else
case ¥BackupMethod in
mysqldump)
if [ -z ¥DBPasswd ]
then
mysqldump -u ¥DBUser --opt ¥DBName > ¥DumpFile
else
mysqldump -u ¥DBUser -p¥DBPasswd --opt ¥DBName > ¥DumpFile
fi
tar czvf ¥NewFile ¥DumpFile >> ¥LogFile 2>&1
echo "[¥NewFile]Backup Success!" >> ¥LogFile
rm -rf ¥DumpFile
;;
mysqlhotcopy)
rm -rf ¥DumpFile
mkdir ¥DumpFile
if [ -z ¥DBPasswd ]
then
mysqlhotcopy -u ¥DBUser ¥DBName ¥DumpFile >> ¥LogFile 2>&1
else
mysqlhotcopy -u ¥DBUser -p ¥DBPasswd ¥DBName ¥DumpFile >>¥LogFile 2>&1
fi
tar czvf ¥NewFile ¥DumpFile >> ¥LogFile 2>&1
echo "[¥NewFile]Backup Success!" >> ¥LogFile
rm -rf ¥DumpFile
;;
*)
/etc/init.d/mysqld stop >/dev/null 2>&1
tar czvf ¥NewFile ¥DBPath¥DBName >> ¥LogFile 2>&1
/etc/init.d/mysqld start >/dev/null 2>&1
echo "[¥NewFile]Backup Success!" >> ¥LogFile
;;
esac
fi

echo "-------------------------------------------" >> ¥LogFile

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