#!/bin/sh
## backup each mysql db into a different file, rather than one big file
## as with --all-databases. This will make restores easier.
## To backup a single database simply add the db name as a parameter (or multiple dbs)

## Putting the script in /var/backups/mysql seems sensible... on a debian machine that is
## Create the user and directories
# mkdir -p /var/backups/mysql/databases
# useradd --home-dir /var/backups/mysql --gid backup --no-create-home mysql-backup
## Remember to make the script executable, and unreadable by others
# chown -R mysql-backup:backup /var/backups/mysql
# chmod u=rwx,g=rx,o= /var/backups/mysql/dump.sh

## crontab entry - backup every night at 02:00
# sudo -u mysql-backup crontab -e
# 0 2 * * * /var/backups/mysql/dump.sh

## Create 'backup' mysql user
# CREATE USER 'backup'@'localhost' IDENTIFIED BY 's3cr3t';
# GRANT EVENT, LOCK TABLES, PROCESS, REFERENCES, SELECT, SHOW DATABASES, SHOW VIEW, TRIGGER ON *.* TO 'backup'@'localhost' ;


USER="backup"
PASSWORD="s3cr3t"
OUTPUTDIR=$(dirname $0)"/databases"
MYSQLDUMP="/usr/bin/mysqldump"
MYSQL="/usr/bin/mysql"
#Consulta que excluye las DB de sytema y otras innecesarias
SHOW="SHOW DATABASES WHERE \`DATABASE\` NOT IN ('mysql','information_schema')"
FILE="bk/DB_"$(date '+%y-%m-%d.bk')


if [ -z "$1" ]; then
	databases=`$MYSQL --user=$USER --password=$PASSWORD --batch --skip-column-names -e "$SHOW"`
	for database in $databases; do
		$MYSQLDUMP \
		--user=$USER --password=$PASSWORD \
		--force \
		--quote-names --dump-date \
		--opt --single-transaction \
		--events --routines --triggers \
		--databases $database \
		--result-file="$OUTPUTDIR/$database.sql"
	done
else
	for database in ${@}; do
		$MYSQLDUMP \
		--user=$USER --password=$PASSWORD \
		--force \
		--quote-names --dump-date \
		--opt --single-transaction \
		--events --routines --triggers \
		--databases $database \
		--result-file="$OUTPUTDIR/$database.sql"
	done
fi
#Comprension de todo las bases de datos
tar -czvf $FILE databases/