linux服务器的数据库自动备份脚本

Posted 2022-11-26 gorpeln-chen

脚本文件下载：http://download.csdn.net/download/chen_gp_x/10247413

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修改相应的参数，将文件传到linux服务器，使用 crontab -e 命令，添加定时任务（每两个小时执行一次）0 */2 * * * /root/dbbackup

crontab -e
0 */2 * * * /root/dbbackup

crontab的详细使用说明请自行百度，/root/dbbackup为存放.sh脚本文件的路径

注意：记得要设置文件和文件的可执行权利（777）.

#!/bin/bash
#Author [e-mail]
MAXIMUM_BACKUP_FILES=100                #最大备份文件数
BACKUP_FOLDERNAME="/root"               #数据库备份文件的主目录
DB_HOSTNAME="localhost"                 #mysql所在主机的主机名
DB_USERNAME="root"                      #mysql登录用户名
DB_PASSWORD="mysqlPassword"             #mysql登录密码
DATABASES=(
"mysql"
"information_schema"
"performance_schema"
"zb_rent"                 #备份的数据库名,需要备份的都可以写在这
)
#=========
echo "Bash Database Backup Tool"
#CURRENT_DATE=$(date +%F_%T)
CURRENT_DATE=$(date +%F_%H-%M-%S)              #定义当前日期为变量(%T)xp系统命名不能使用：
BACKUP_FOLDER="$BACKUP_FOLDERNAME_$CURRENT_DATE" #存放数据库备份文件的目录
mkdir $BACKUP_FOLDER #创建数据库备份文件目录
#统计需要被备份的数据库
count=0
while [ "x$DATABASES[count]" != "x" ];do
count=$(( count + 1 ))
done
echo "[+] $count databases will be backuped..."
#循环这个数据库名称列表然后逐个备份这些数据库
for DATABASE in $DATABASES[@];do
echo "[+] Mysql-Dumping: $DATABASE"
echo -n "   Began:  ";echo $(date)
if $(/usr/local/mysql/bin/mysqldump -h $DB_HOSTNAME -u$DB_USERNAME -p$DB_PASSWORD $DATABASE > "$BACKUP_FOLDER/$DATABASE.sql");then
echo "  Dumped successfully!"
else
echo "  Failed dumping this database!"
fi
echo -n "   Finished: ";echo $(date)
done
echo
echo "[+] Packaging and compressing the backup folder..."
tar -cv $BACKUP_FOLDER | bzip2 > $BACKUP_FOLDER.tar.bz2 && rm -rf $BACKUP_FOLDER
BACKUP_FILES_MADE=$(ls -l $BACKUP_FOLDERNAME*.tar.bz2 | wc -l)
BACKUP_FILES_MADE=$(( $BACKUP_FILES_MADE - 0 ))
#把已经完成的备份文件数的结果转换成整数数字

echo
echo "[+] There are $BACKUP_FILES_MADE backup files actually."
#判断如果已经完成的备份文件数比最大备份文件数要大，那么用已经备份的文件数减去最大备份文件数,打印要删除旧的备份文件
if [ $BACKUP_FILES_MADE -gt $MAXIMUM_BACKUP_FILES ];then
REMOVE_FILES=$(( $BACKUP_FILES_MADE - $MAXIMUM_BACKUP_FILES ))
echo "[+] Remove $REMOVE_FILES old backup files."
#统计所有备份文件，把最新备份的文件存放在一个临时文件里，然后删除旧的文件，循环出临时文件的备份文件从临时目录里移到当前目录
ALL_BACKUP_FILES=($(ls -t $BACKUP_FOLDERNAME*.tar.bz2))
SAFE_BACKUP_FILES=("$ALL_BACKUP_FILES[@]:0:$MAXIMUM_BACKUP_FILES")
echo "[+] Safeting the newest backup files and removing old files..."
FOLDER_SAFETY="_safety"
if [ ! -d $FOLDER_SAFETY ]
then mkdir $FOLDER_SAFETY

fi
for FILE in $SAFE_BACKUP_FILES[@];do

mv -i  $FILE  $FOLDER_SAFETY
done
rm -rf $BACKUP_FOLDERNAME*.tar.bz2
mv  -i $FOLDER_SAFETY/* ./
rm -rf $FOLDER_SAFETY

如果需要请查看下篇：使用windows电脑将服务器备份文件自动批量下载到本地主机上。

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