mysql数据库备份

#!/bin/bash
# Shell script to backup MySQL database

# Set these variables
MyUSER=""       # DB_USERNAME
MyPASS=""       # DB_PASSWORD
MyHOST=""       # DB_HOSTNAME

# Backup Dest directory
DEST="" 

# Email for notifications
# EMAIL=""

# How many days old files must be to be removed
DAYS=5

# Linux bin paths
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
GZIP="$(which gzip)"

# Get date in dd-mm-yyyy format
NOW="$(date +"%Y-%m-%d_%s")"

# Create Backup sub-directories
MBD="$DEST/$NOW"
install -d $MBD

# DB skip list
SKIP="information_schema
another_one_db"

# Get all databases
DBS="$($MYSQL -h $MyHOST -u $MyUSER -p$MyPASS -Bse 'show databases')"

# Archive database dumps
for db in $DBS
do
    skipdb=-1
    if [ "$SKIP" != "" ];
    then
        for i in $SKIP
        do
            [ "$db" == "$i" ] && skipdb=1 || :
        done
    fi

    if [ "$skipdb" == "-1" ] ; then
        FILE="$MBD/$db.sql"
    $MYSQLDUMP -h $MyHOST -u $MyUSER -p$MyPASS --single-transaction $db > $FILE
    fi
done

# Archive the directory, send mail and cleanup
cd $DEST
tar -cf $NOW.tar $NOW
$GZIP -9 $NOW.tar

# echo "MySQL backup is completed! Backup name is $NOW.tar.gz" | mail -s "MySQL backup" $EMAIL
rm -rf $NOW

# Remove old files
find $DEST -mtime +$DAYS -exec rm -f {} \;