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  • 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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  • 原文地址:https://www.cnblogs.com/security-guard/p/15387139.html
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