数据库的增量以及全量的备份

应用场景:
1)增量备份在周一到周六凌晨3点,会复制mysql-bin.00000*到指定目录;
2)全量备份则使用mysqldump将所有的数据库导出,每周日凌晨3点执行,并会删除上周留下的mysq-bin.00000*,然后对mysql的备份操作会保留在bak.log文件中。

脚本实现:
1)全量备份脚本(假设mysql登录密码为123456;注意脚本中的命令路径):

[root@test-huanqiu ~]# vim /root/Mysql-FullyBak.sh
#!/bin/bash
# Program
# use mysqldump to Fully backup mysql data per week!
# History
# Path
BakDir=/home/mysql/backup
LogFile=/home/mysql/backup/bak.log
Date=`date +%Y%m%d`
Begin=`date +"%Y年%m月%d日 %H:%M:%S"`
cd $BakDir
DumpFile=$Date.sql
GZDumpFile=$Date.sql.tgz
/usr/local/mysql/bin/mysqldump -uroot -p123456 --quick --events --all-databases --flush-logs --delete-master-logs --single-transaction > $DumpFile
/bin/tar -zvcf $GZDumpFile $DumpFile
/bin/rm $DumpFile
Last=`date +"%Y年%m月%d日 %H:%M:%S"`
echo 开始:$Begin 结束:$Last $GZDumpFile succ >> $LogFile
cd $BakDir/daily
/bin/rm -f *

 

2)增量备份脚本(脚本中mysql的数据存放路径是/home/mysql/data,具体根据自己的实际情况进行调整)

[root@test-huanqiu ~]# vim /root/Mysql-DailyBak.sh
#!/bin/bash
# Program
# use cp to backup mysql data everyday!
# History
# Path
BakDir=/home/mysql/backup/daily                     //增量备份时复制mysql-bin.00000*的目标目录,提前手动创建这个目录
BinDir=/home/mysql/data                                   //mysql的数据目录
LogFile=/home/mysql/backup/bak.log
BinFile=/home/mysql/data/mysql-bin.index           //mysql的index文件路径,放在数据目录下的
/usr/local/mysql/bin/mysqladmin -uroot -p123456 flush-logs
#这个是用于产生新的mysql-bin.00000*文件
Counter=`wc -l $BinFile |awk '{print $1}'`
NextNum=0
#这个for循环用于比对$Counter,$NextNum这两个值来确定文件是不是存在或最新的
for file in `cat $BinFile`
do
    base=`basename $file`
    #basename用于截取mysql-bin.00000*文件名,去掉./mysql-bin.000005前面的./
    NextNum=`expr $NextNum + 1`
    if [ $NextNum -eq $Counter ]
    then
        echo $base skip! >> $LogFile
    else
        dest=$BakDir/$base
        if(test -e $dest)
        #test -e用于检测目标文件是否存在,存在就写exist!到$LogFile去
        then
            echo $base exist! >> $LogFile
        else
            cp $BinDir/$base $BakDir
            echo $base copying >> $LogFile
         fi
     fi
done
echo `date +"%Y年%m月%d日 %H:%M:%S"` $Next Bakup succ! >> $LogFile

  

3)设置crontab任务,执行备份脚本。先执行的是增量备份脚本,然后执行的是全量备份脚本:

[root@test-huanqiu ~]# crontab -e
#每个星期日凌晨3:00执行完全备份脚本
0 3 * * 0 /bin/bash -x /root/Mysql-FullyBak.sh >/dev/null 2>&1
#周一到周六凌晨3:00做增量备份
0 3 * * 1-6 /bin/bash -x /root/Mysql-DailyBak.sh >/dev/null 2>&1

4)手动执行上面两个脚本,测试下备份效果
[root@test-huanqiu backup]# pwd
/home/mysql/backup
[root@test-huanqiu backup]# mkdir daily
[root@test-huanqiu backup]# ll
total 4
drwxr-xr-x. 2 root root 4096 Nov 29 11:29 daily
[root@test-huanqiu backup]# ll daily/
total 0

先执行增量备份脚本
[root@test-huanqiu backup]# sh /root/Mysql-DailyBak.sh
[root@test-huanqiu backup]# ll
total 8
-rw-r--r--. 1 root root 121 Nov 29 11:29 bak.log
drwxr-xr-x. 2 root root 4096 Nov 29 11:29 daily
[root@test-huanqiu backup]# ll daily/
total 8
-rw-r-----. 1 root root 152 Nov 29 11:29 mysql-binlog.000030
-rw-r-----. 1 root root 152 Nov 29 11:29 mysql-binlog.000031
[root@test-huanqiu backup]# cat bak.log
mysql-binlog.000030 copying
mysql-binlog.000031 copying
mysql-binlog.000032 skip!
2016年11月29日 11:29:32 Bakup succ!

  

然后执行全量备份脚本

[root@test-huanqiu backup]# sh /root/Mysql-FullyBak.sh
20161129.sql
[root@test-huanqiu backup]# ll
total 152
-rw-r--r--. 1 root root 145742 Nov 29 11:30 20161129.sql.tgz
-rw-r--r--. 1 root root 211 Nov 29 11:30 bak.log
drwxr-xr-x. 2 root root 4096 Nov 29 11:30 daily
[root@test-huanqiu backup]# ll daily/
total 0
[root@test-huanqiu backup]# cat bak.log
mysql-binlog.000030 copying
mysql-binlog.000031 copying
mysql-binlog.000032 skip!

 11:30:38 20161129.sql.tgz succ

转载于:https://www.cnblogs.com/abeli/p/6725201.html

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