centos每天自动备份mysql数据库_MySQL
CentOS
bitsCN.com 脚本如下
#!/bin/bash
#功能说明:本功能用于备份数据库
#编写日期:2010/12/06
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
export PATH
#数据库用户名
dbuser='root'
#数据库密码
dbpasswd='123456'
#数据库名,可以定义多个数据库,中间以空格隔开,如:test test1 test2
dbname='test1 test2'
#备份时间
backtime=`date +%Y%m%d%H%M%S`
#日志备份路径
logpath='/second/backup'
#数据备份路径
datapath='/second/backup'
#日志记录头部
echo ‘"备份时间为${backtime},备份数据库表 ${dbname} 开始" >> ${logpath}/mysqllog.log
#正式备份数据库
for table in $dbname; do
source=`mysqldump -u ${dbuser} -p${dbpasswd} ${table}> ${logpath}/${backtime}.sql` 2>> ${logpath}/mysqllog.log;
#备份成功以下操作
if [ "$?" == 0 ];then
cd $datapath
#为节约硬盘空间,将数据库压缩
tar jcf ${table}${backtime}.tar.bz2 ${backtime}.sql > /dev/null
#删除原始文件,只留压缩后文件
rm -f ${datapath}/${backtime}.sql
echo "数据库表 ${dbname} 备份成功!!" >> ${logpath}/mysqllog.log
else
#备份失败则进行以下操作
echo "数据库表 ${dbname} 备份失败!!" >> ${logpath}/mysqllog.log
fi
done
定时执行脚本:
方式:
1、
执行 crontab -e
输入以下内容:
______________________________________________________________________________
00 00 * * * /bin/bash yourpath/mysqlbak.sh
2、
打开自动执行文件
vi /etc/crontab
在etc中加入如下内容,让其自动执行任务。
00 00 * * * root /mysqlbak.sh
以上两个 00 00 *** 为每天的凌晨自动执行脚本
分 时 日 月 周 命令
M: 分钟(0-59)。每分钟用*或者 */1表示
H:小时(0-23)。(0表示0点)
D:天(1-31)。
m: 月(1-12)。
d: 一星期内的天(0~6,0为星期天)。
3、
Redhat方法:
Redhat的crontab采用按时间调用4个目录(/etc/cron.hourly:每小时;/etc/cron.daily:每
天;/etc/cron.weekly:每周;/etc/cron.monthly:每月)中脚本出来运行的方式。
Redhat中只需要将刚才编辑的脚本复制到相应的目录即可。
cp /autobackupmysql.sh etc/cron.daily
重启etc
/etc/rc.d/init.d/crond restart

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