Bash script to perform backups on one or more MySQL databases.

mysql_backup.sh

#!/bin/bash

#
# 	Use this script to perform backups of one or more MySQL databases.
#

# Databases that you wish to be backed up by this script. You can have any number of databases specified; encapsilate each database name in single quotes and separate each database name by a space.
#
# Example:
# databases=( '__DATABASE_1__' '__DATABASE_2__' )
databases=()

# The host name of the MySQL database server; usually 'localhost'
db_host="localhost"

# The port number of the MySQL database server; usually '3306'
db_port="3306"

# The MySQL user to use when performing the database backup.
db_user="backups"

# The password for the above MySQL user.
db_pass=""

# Directory to which backup files will be written. Should end with slash ("/").
backups_dir="/home/backups/db/"

backups_user="backups"

# Date/time included in the file names of the database backup files.
datetime=$(date +'%Y-%m-%dT%H:%M:%S')

for db_name in ${databases[@]}; do
        # Create database backup and compress using gzip.
        mysqldump -u $db_user -h $db_host -P $db_port --password=$db_pass $db_name | gzip -9 > $backups_dir$db_name--$datetime.sql.gz
done

# Set appropriate file permissions/owner.
chown $backups_user:$backups_user $backups_dir*--$datetime.sql.gz
chmod 0400 $backups_dir*--$datetime.sql.gz