Linux下MySQL安裝和日常維護(3)

Mysql日常備份

 

下面shell指令碼迴圈備份MySQL資料庫中的所有庫，使用時根據情況調整備份目錄和mysql的root密碼，保留最近14天記錄，超過14天備份進行刪除,配置在crontab中每天23：30進行備份,備份完之後傳送成功郵件

 

-bash-3.2$ crontab -l

30 23 * * * sh /home/mysql/backup_script/backup_mysql.sh

-bash-3.2$ more /home/mysql/backup_script/backup_mysql.sh

 

#!/bin/sh

#Author : eymitwu

#Last Modified : 2012-05-18

# mysql_backup.sh: backup mysql databases and keep newest 14 days backup.

# -----------------------------

db_user="root"

db_passwd="test"

db_host="localhost"

logfile=/home/mysql/backup_script/backup.log

# the directory for story your backup file.

backup_dir="/nfsbackup/mysql"

# date format for backup file (dd-mm-yyyy)

time="$(date +"%d-%m-%Y")"

# mysql, mysqldump and some other bin's path

MYSQL="/usr/bin/mysql"

MYSQLDUMP="/usr/bin/mysqldump"

MKDIR="/bin/mkdir"

RM="/bin/rm"

MV="/bin/mv"

GZIP="/bin/gzip"

ADMIN_MAIL="eymitwu@hotmail.com "

echo ".............Backup Script. Running on $time............" >> $logfile

# check the directory for store backup is writeable

test ! -w $backup_dir && echo "Error: $backup_dir is un-writeable." && exit 0

# the directory for story the newest backup

test ! -d "$backup_dir/backup.0/" && $MKDIR "$backup_dir/backup.0/"

# get all databases

all_db="$($MYSQL -u $db_user -h $db_host -p$db_passwd -Bse 'show databases')"

for db in $all_db

do

$MYSQLDUMP -u $db_user -h $db_host -p$db_passwd $db | $GZIP -9 > "$backup_dir/backup.0/$time.$db.gz"

done

# delete the oldest backup

test -d "$backup_dir/backup.14/" && $RM -rf "$backup_dir/backup.14"

# rotate backup directory

for int in  13 12 11 10 9 8 7 6 5 4 3 2 1 0

do

if(test -d "$backup_dir"/backup."$int")

then

next_int=`expr $int + 1`

$MV "$backup_dir"/backup."$int" "$backup_dir"/backup."$next_int"

fi

done

echo ".............Backup Script. Completed,Exiting Now $time............" >> $logfile

SUBJECT="Successfully checking backup mysql log on :`hostname`"

function message {

echo -e "Today's $time  checking of backup log has been done \n"

echo -e " See /home/mysql/backup_script/backup.log for  more information!  \n"

}

message|mail -s "$SUBJECT" "$ADMIN_MAIL"

exit 0;

-bash-3.2$

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