mysql备份脚本

#!/bin/bash

# 备份目录
bakdir="/data/backupsql"

# mysql账号口令
username="root"
passwd="fucker"

# mysql路径,默认为系统环境变量
mysqldir=""

# 是否开启全库备份,0为全库备份,1为单库分开备份,默认全库备份
alldbs_bak=""

# 单库备份要备份的数据库,中间空格隔开,默认备份所有单库
bak_sql=""

# 备份数据保留天数
save_day=3

date=$(date +%Y%m%d)

function check_cmd() {
if [ ! -d $bakdir ];then
    mkdir -p $bakdir
fi

if [ -n "$mysqldir" ];then
    mysql=${mysqldir}/bin/mysql
    mysqldump=${mysqldir}/bin/mysqldump
    if [[ ! -f $mysql || ! -f $mysqldump ]];then
        echo "未找到mysql相关命令,备份脚本退出" 
        exit 1
    fi
elif [ ! -n "$mysqldir" ];then
    mysql=mysql
    mysqldump=mysqldump
fi
}

function single_bak() {
cd $bakdir
if [[ "$alldbs_bak" == "1" && -n ${bak_sql} ]];then
    #备份指定单库
    for dbs in ${bak_sql}
    do
        local localtime=$(date '+%F %T')
#        $mysqldump -u$username -p$passwd $dbs --quote-names --skip-opt --add-locks --extended-insert --disable-keys --set-charset --create-options --single-transaction -q --no-autocommit -R --default-character-set=utf8 --master-data=2  > ${dbs}_${date}.sql
        $mysqldump -u$username -p$passwd $dbs --events --quote-names --skip-opt --add-locks --extended-insert --disable-keys --set-charset --create-options -q --no-autocommit -R --default-character-set=utf8  > ${dbs}_${date}.sql
        if [ $? -eq 0 ];then
            echo "$localtime 数据库$dbs备份完成" >> ${bakdir}/backup.log
        else
            echo "$localhost 数据库$dbs备份失败" >> ${bakdir}/backup.log
        fi
    done

else
    #备份所有单库
    for dbs in $($mysql -u$username -p$passwd -e "show databases;"|grep -v Database|grep -v information_schema |grep -v performance_schema |grep -v test )
    do
        local localtime=$(date '+%F %T')
        #$mysqldump -u$username -p$passwd $dbs --quote-names --skip-opt --add-locks --extended-insert --disable-keys --set-charset --create-options --single-transaction -q --no-autocommit -R --default-character-set=utf8 --master-data=2 > ${dbs}_${date}.sql
        $mysqldump -u$username -p$passwd $dbs --events --quote-names --skip-opt --add-locks --extended-insert --disable-keys --set-charset --create-options -q --no-autocommit -R --default-character-set=utf8 > ${dbs}_${date}.sql
        if [ $? -eq 0 ];then
            echo "$localtime 数据库$dbs备份完成" >> ${bakdir}/backup.log
        else
            echo "$localhost 数据库$dbs备份失败" >> ${bakdir}/backup.log
        fi
    done
fi
}

function alldbs_bak() {
cd $bakdir
local localtime=$(date '+%F %T')
echo "$localtime 全库备份开始" >> ${bakdir}/backup.log
$mysqldump -u$username -p$passwd --events --quote-names --skip-opt --add-locks --extended-insert --disable-keys --set-charset --create-options -q --no-autocommit -R --default-character-set=utf8  --all-databases > sqlbakup-all-databaes_${date}.sql
local localtime=$(date '+%F %T')
if [ $? -eq 0 ];then
    echo "$localtime 全库备份完成" >> ${bakdir}/backup.log
else
    echo "$localtime 全库备份失败" >> ${bakdir}/backup.log
fi
}


function del_sql() {
cd $bakdir
echo "*****开始删除${save_day}天之前的数据*****" >> ${bakdir}/backup.log
find ./ -type f -name "*.sql" -mtime +${save_day} -exec rm -f {} \; >> ${bakdir}/backup.log
#find  ./ -type f -name "*.sql" -mtime +${save_day} -exec ls {} \; >> ${bakdir}/backup.log
echo "********命令执行完成*********" >> ${bakdir}/backup.log
}


function main() {
local localtime=$(date '+%F %T')
check_cmd
if [[ $alldbs_bak == "0" || ! -n $alldbs_bak ]];then
    echo "*****全库备份开始*****" >> ${bakdir}/backup.log
    alldbs_bak
    echo "*****全库备份结束*****" >> ${bakdir}/backup.log
elif (( "$alldbs_bak" == "1" ));then
    echo "*****单库备份开始*****" >> ${bakdir}/backup.log
    single_bak
    echo "*****单库备份结束*****" >> ${bakdir}/backup.log
else
    echo "备份方式填写错误,请重新填写"
    exit 1
fi
del_sql
}
main