文件名 mysql_data_backup.sh (需要執行權限)
mysql 數據庫表自動備份shell 腳本 (第二版)
調用示例:
mysql_data_backup.sh
包含功能:
1.生成備份日志
2.自動檢測指定數據庫中的庫列表,單獨備份每個庫,最後打包為tar文件
3.可指定備份存檔文件(.tar) 保留的數目, 按時間正序清理以前的存檔
4. 恢復時可以登錄 mysql 以後直接用 source xxx.sql 自動刪除和創建數據庫,並還原數據.
需要修改的變量:
代碼如下 復制代碼db_host //數據庫主機
db_user //數據庫帳號
db_passwd //數據庫密碼
backupFileNum //保留的備份存檔文件數目,超出該數目自動清理
backupDir //備份文件存放的目錄
logfile //日志文件路徑
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如何恢復數據:
參見 mysql 數據庫表自動備份shell 腳本(第一版)
代碼如下 復制代碼#!/bin/bash
# mysq link user config
db_host=192.168.0.222
db_user=admin
db_passwd=123456
# backup File number
backupFileNum=4
# log file
logfile='/sqlbackup/backup.log'
# backup of directory Do not bring /
backupDir="/sqlbackup"
# check database name
echo 'Backup begin'
begin_time=`date '+%s'`
# get databases list
databases_content=`mysqlshow -u $db_user -p$db_passwd -h $db_host | sed 's/|//g' | sed 's/ //g' | sed '1,4d' | sed '$d'`
# check databases if emptyed then exit
databases_content_check=`echo -n $databases_content > /tmp/mysql_backup_check.tmp`
if [ ! -s /tmp/mysql_backup_check.tmp ];then
echo 'Database Emptyed Backup stop.'
exit
fi
# plan backup of sql databases
databases=(${databases_content})
# get databases length
databases_len=${#databases[*]}
# backup of directory for date
datestamp=$(date "+%Y%m%d")
# final backup directroy
fileDir="$backupDir/$datestamp"
# auto create target directory
if [ ! -d $backupDir ];then
mkdir $backupDir
fi
if [ ! -d $fileDir ];then
mkdir $fileDir
fi
if [ ! -d $logfile ];then
touch $logfile
fi
echo "total $databases_len databases."
for ((i=0;i<$databases_len;i++))
do
dbName="${databases[$i]}"
fileName="${databases[$i]}.sql"
filePath="$fileDir/$fileName"
echo "Database [$dbName] Backup ..."
echo "DROP DATABASE IF EXISTS `$dbName`;" > $filePath
echo "CREATE DATABASE `$dbName` CHARACTER SET `utf8`;" >> $filePath
echo "use $dbName;" >> $filePath
mysqldump -h $db_host -u $db_user -p$db_passwd $dbName >> $filePath
done
# tar files
cd $backupDir
tar cvf ${datestamp}.tar ./${datestamp}
# delete source archive
rm -rf ./${datestamp}
end_time=`date '+%s'`
total_time=$[end_time-begin_time]
echo 'Backup Done'
echo "Total time: ${total_time} second"
now_date=`date '+%Y-%m-%d %k:%M:%S'`
# save log
echo "${now_date} : Backup Databases : Total time [${total_time}s]" >> $logfile
# begin clean excess of backup file
# count backup dir name of length;
backupDir_length=`expr length "$backupDir"`
# get tar file list
backupFile_list=` find $backupDir -name "*.tar" | sort -n -r -k 1.$backupDir_length`
# set array
backupFiles=(${backupFile_list})
backupFile_length=${#backupFiles[*]}
if [ $backupFile_length -gt $backupFileNum ];then
for((i=$backupFile_length;i>$backupFileNum;i--))
do
fileName="${backupFiles[$i-1]}"
rm -rf $fileName
#save log
echo "file: $fileName deleted"
echo "file: $fileName deleted" >> $logfile
done
else
echo "backup file number normal."
fi