CentOS下mysql备份脚本(mysqldump)

#!/bin/bash

#全备方式,一般在从机上执行,适用于小中型mysql数据库

#删除15天以前备份

#作者:fafu_li

#时间:2015.08.10


source /etc/profile        #加载系统环境变量

source ~/.bash_profile    #加载用户环境变量

set -o nounset             #引用未初始化变量时退出

#set -o errexit            #执行shell命令遇到错误时退出


user="root"

password="123456"

host="localhost"

port="3306"

#需备份的数据库,数组

db=("test")

#备份时加锁方式,

#MyISAM为锁表--lock-all-tables,

#InnoDB为锁行--single-transaction

lock="--single-transaction"

mysql_path="/usr/local/mysql"

backup_path="${mysql_path}/backup"

date=$(date +%Y-%m-%d_%H-%M-%S)

day=15

backup_log="${mysql_path}/backup.log"


#建立备份目录

if [ ! -e $backup_path ];then

    mkdir -p $backup_path

fi


#删除以前备份

find $backup_path -type f -mtime +$day -exec rm -rf {} \; > /dev/null 2>&1


echo "开始备份数据库:${db[*]}"


#备份并压缩

backup_sql(){

    dbname=$1

    backup_name="${dbname}_${date}.sql"

    #-R备份存储过程,函数,触发器

    mysqldump -h $host -P $port -u $user -p$password $lock --default-character-set=utf8 --flush-logs -R $dbname > $backup_path/$backup_name    

    if [[ $? == 0 ]];then

        cd $backup_path

        tar zcpvf $backup_name.tar.gz $backup_name

        size=$(du $backup_name.tar.gz -sh | awk '{print $1}')

        rm -rf $backup_name

        echo "$date 备份 $dbname($size) 成功 "

    else

        cd $backup_path

        rm -rf $backup_name

        echo "$date 备份 $dbname 失败 "

    fi

}


#循环备份

length=${#db[@]}

for (( i = 0; i < $length; i++ )); do

        backup_sql ${db[$i]} >> $backup_log 2>&1

done


echo "备份结束,结果查看 $backup_log"

du $backup_path/*$date* -sh | awk '{print "文件:" $2 ",大小:" $1}'