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#!/bin/bash
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
# MySQL database backup script [Thomas Lange <thomas@nerdmind.de>] #
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
# #
# This database backup script loop through each database (except the excluded #
# databases in DATABASE_EXCLUDED) and creates a bzip2 compressed backup file. #
# #
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
#===============================================================================
# Define database login credentials and excluded databases
#===============================================================================
DATABASE_USERNAME="InsertYourUsernameHere"
DATABASE_PASSWORD="InsertYourPasswordHere"
DATABASE_EXCLUDED="(Database|mysql|information_schema|performance_schema)"
#===============================================================================
# Define backup directories and target filename
#===============================================================================
DIRECTORY_ROOT="/mnt/backups/databases/"
DIRECTORY_PATH="$(date +%Y-%m-%d-%Hh%Mm)/"
DIRECTORY_FILE="${DIRECTORY_ROOT}${DIRECTORY_PATH}%s.sql.bz2"
#===============================================================================
# Delete old backups in backup root directory
#===============================================================================
find "${DIRECTORY_ROOT}" -type d -mtime +30 -exec rm -r {} \;
#===============================================================================
# Create backup path directory if not exists
#===============================================================================
if [ ! -d "${DIRECTORY_ROOT}${DIRECTORY_PATH}" ]; then
mkdir "${DIRECTORY_ROOT}${DIRECTORY_PATH}"
fi
#===============================================================================
# Fetch all databases from local MySQL server
#===============================================================================
DATABASES=`mysql --user="${DATABASE_USERNAME}" --password="${DATABASE_PASSWORD}" --execute="SHOW DATABASES;" | grep -Ev "${DATABASE_EXCLUDED}"`
#===============================================================================
# Loop through all databases and create compressed dump
#===============================================================================
for database in ${DATABASES}; do
echo "[INFO] Creating compressed database backup for ${database}"
mysqldump --lock-all-tables --user="${DATABASE_USERNAME}" --password="${DATABASE_PASSWORD}" "${database}" | bzip2 > $(printf "${DIRECTORY_FILE}" "${database}")
done
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