innobackupex自动备份脚本（增量备份，自动压缩）

#!/bin/bash

#日期转为天数
function date2days {
    echo "$*" | awk ‘{
        z=int((14-$2)/12); y=$1+4800-z; m=$2+12*z-3;
        j=int((153*m+2)/5)+$3+y*365+int(y/4)-int(y/100)+int(y/400)-2472633;
        print j
    }‘
}

#说明：脚本执行策略为每天执行一次，执行前需要先建立config文件，并在config文件
#中添加
#backup_full=
#backup_pre_name=
#即可，注意路径。
#备份策略，每七天一个循环，第一天为全备份，第二天至第六天为增量备份。
#后续会增加已备份文件压缩转移定期删除部分 

#######################
db_user="root"
db_passwd=""
db_defaults_file="/home/backup/config/3306.cnf"
db_socket="/var/lib/mysql/mysql_3306.sock"
db_backup="/home/backup/"
db_backup_fulldir="/home/backup/full/"
db_backup_incrementaldir="/home/backup/incremental/"
db_backup_gzfull="/home/backup/gzip/"
db_backup_tarfull="/home/backup/tar.gzdb/"

#得到当前时间和配置文件
time="$(date +"back_%d-%m-%Y")"
source /home/backup/config/config

#计算今天到上次全备份相隔天数
_Day=$(date2days `echo ${backup_full:5:10}|awk ‘BEGIN{FS="-"}{print $3,$2,$1}‘`)
Day=$(date2days `date +"%Y %m %d"`)
echo $_Day
echo $Day
let result=$Day-$_Day
echo "相差$result天"

if [ -z ${backup_full} ] || [ $result -ge 7  ] ; then
#todo
echo ‘全备份‘
backup_full=${time}
innobackupex --defaults-file=$db_defaults_file --user=$db_user --password --no-timestamp  --socket=$db_socket ${db_backup_fulldir}${backup_full}/

#更新配置文件
echo "backup_full=${backup_full}" >/home/backup/config/config
echo "backup_pre_name=full/${backup_full}" >>/home/backup/config/config
#自动删除两周以前的备份文件
#获取本次全备份两周前的文件夹名称
time_rm_f_7="$(date -d "7 days ago" +"back_%d-%m-%Y")"
time_rm_i_6="$(date -d "6 days ago" +"back_%d-%m-%Y")"
time_rm_i_5="$(date -d "5 days ago" +"back_%d-%m-%Y")"
time_rm_i_4="$(date -d "4 days ago" +"back_%d-%m-%Y")"
time_rm_i_3="$(date -d "3 days ago" +"back_%d-%m-%Y")"
time_rm_i_2="$(date -d "2 days ago" +"back_%d-%m-%Y")"
time_rm_i_1="$(date -d "1 days ago" +"back_%d-%m-%Y")"

if test -d $db_backup_fulldir${time_rm_f_7}
then
    su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_f_7}_full.tar.gz ${db_backup_fulldir}${time_rm_f_7}"
    su - root -c  "rm -rf ${db_backup_fulldir}${time_rm_f_7}"
    echo "压缩目录rm $db_backup_fulldir${time_rm_f_7}" >>/home/backup/config/tar.log
    if test -d $db_backup_incrementaldir${time_rm_i_6}
    then

        su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_6}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_6}"
        su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_6}"
        echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_6}" >>/home/backup/config/tar.log
        if test -d $db_backup_incrementaldir${time_rm_i_5}
        then

            su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_5}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_5}"
            su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_5}"
            echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_5}" >>/home/backup/config/tar.log
            if test -d $db_backup_incrementaldir${time_rm_i_4}
            then

                su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_4}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_4}"
                su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_4}"
                echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_4}" >>/home/backup/config/tar.log
                if test -d $db_backup_incrementaldir${time_rm_i_3}
                then

                    su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_3}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_3}"
                    su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_3}"
                    echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_3}" >>/home/backup/config/tar.log
                    if test -d $db_backup_incrementaldir${time_rm_i_2}
                    then

                        su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_2}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_2}"
                        su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_2}"
                        echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_2}" >>/home/backup/config/tar.log
                        if test -d $db_backup_incrementaldir${time_rm_i_1}
                        then
                            su - root -c  "tar -czvf ${db_backup_tarfull}${time_rm_i_1}_increment.tar.gz ${db_backup_incrementaldir}${time_rm_i_1}"
                            su - root -c  "rm -rf ${db_backup_incrementaldir}${time_rm_i_1}"
                            echo "压缩目录rm $db_backup_incrementaldir${time_rm_i_1}" >>/home/backup/config/tar.log

                        fi
                    fi
                fi
            fi
        fi
    fi
else
   echo "两周前备份不存在" >>/home/backup/config/tar.log
fi
echo ‘全备份‘
else
#todo
echo ‘增量备份‘

innobackupex  --defaults-file=$db_defaults_file --socket=$db_socket --no-timestamp  --incremental ${db_backup_incrementaldir}${time}/ --incremental-basedir=${db_backup}${backup_pre_name}

#更新配置文件
echo "backup_full=${backup_full}" >/home/backup/config/config
echo "backup_pre_name=/incremental/${time}" >>/home/backup/config/config
echo ‘增量备份‘
fi

脚本使用说明

建立/home/backup目录

目录中包含 config full increment tar.gzdb 目录

再config目录中包含3306.cnf为配置文件 tar.log文件记录压缩记录

config文件包含当前备份文件名和全备份文件名，内容如下：

backup_full=back_27-10-2015
backup_pre_name=/incremental/back_28-10-2015

然后再crontab中配置每天晚上9点定时执行脚本即可

脚本备份说明

第一次执行为全备份，接下来六天为增量备份，下一次循环前会把全量和增量压缩移动到tar.gzdb文件夹中然后进行下一个周期

如果有不足的地方希望大家不吝赐教