Mysql Database Backup & Rotation Script

mysqlbackup.sh

#!/bin/bash
## Author: Jeff Higham <jeff@f3code.com>, <jeffhigham@gmail.com>
## Gist: https://gist.github.com/jeffhigham-f3/3b94d508269e614f1f2e701ada8239cc 
##
## Usage: mysqlbackup
##

## BEGIN EDITING

# timestamp for backups
NOW=$(date +'%Y-%m-%d_%H:%M:%S')

# databases to backup seperated by a space or comma
DATABASES='mydatabase'

# database user
USER='root'

# database password
PASSWORD=''

# database host
HOST='localhost'

# directory to store backups.
BACKUPDIR='./'
BACKUPDIR_TABLES='./tables'

# days to retain backups
RETAIN=30

## END EDITING

test -d $BACKUPDIR || mkdir -p $BACKUPDIR
test -d $BACKUPDIR_TABLES || mkdir -p $BACKUPDIR_TABLES

if ! command -v mysql &>/dev/null 2>&1; then
    echo "mysql command not found. Please install the mysql. "
    exit
fi

if ! command -v mysqldump &>/dev/null 2>&1; then
    echo "mysqldump command not found. Please install the mysqldump. "
    exit
fi

if ! command -v gzip &>/dev/null 2>&1; then
    echo "gzip command not found. Please install gzip."
    exit
fi

for DB in $(echo $DATABASES | sed -e 's/,/ /g'); do

    echo
    echo -n "Backing up database: $DB to ${BACKUPDIR}/${DB}-$NOW.sql.gz ... "
    mysqldump --user=$USER --password=$PASSWORD --default-character-set=utf8 --single-transaction --host=$HOST $DB 2>/dev/null | gzip -c >$BACKUPDIR/$DB-$NOW.sql.gz
    echo "done!"

    table_count=0

    for table in $(mysql -NBA --user=$USER --password=$PASSWORD --host=$HOST -D $DB -e 'show tables' 2>/dev/null); do
        echo -n "DUMPING TABLE: $DB.$table to $BACKUPDIR_TABLES/$DB.$table-$NOW.sql.gz ... "
        mysqldump --user=$USER --password=$PASSWORD --default-character-set=utf8 --single-transaction --host=$HOST $DB $table 2>/dev/null | gzip -c >$BACKUPDIR_TABLES/$DB.$table-$NOW.sql.gz
        table_count=$((table_count + 1))
        echo "done!"
    done

    echo "$table_count tables dumped from database '$DB' into dir=$BACKUPDIR_TABLES/"
    echo

done

echo -n "Removing backups older than $RETAIN days ... "
find $BACKUPDIR -type f -name '*.sql.gz' -mtime +${RETAIN} -exec rm {} \;
echo "done!"

Thanks for sharing this!