backup-mysql/README.md

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# MySQL / MariaDB backup script #

Allows you to create and restore local MySQL / MariaDB backups.

# Requirements #

Requires a /root/.my.cnf file which contains credentials so the user root can login to the MySQL server with sufficient privileges without entering a password. Example /root/.my.cnf contents:

```
[client]
user=root
password=mysecretpassword
```

Don't forget to change the permissions:
```
sudo chmod 600 /root/.my.cnf
```

Test if it works with:
```
PING=$(sudo mysqladmin ping 2>/dev/null)

if [ "$PING" != "mysqld is alive" ]; then
  clear && echo "Error: Unable to connect to MySQL Server!"
else
  clear && echo "Successfully connected to the MySQL server!"
fi
```

## Install script ##

```
sudo wget -O /usr/local/sbin/backup_mysql.sh https://git.snel.com/snelcom/backup-mysql/raw/branch/master/backup_mysql.sh
sudo chmod 700 /usr/local/sbin/backup_mysql.sh
```

## Install cronjob ##

This will add a cronjob to root which will run this script daily at 0:10 am. Adjust as necessary.

```
(sudo crontab -l 2>/dev/null; sudo echo '10 0 * * * test -x /usr/local/sbin/backup_mysql.sh && /usr/local/sbin/backup_mysql.sh') | sudo crontab -
```

## Recover database ##

Assuming you want to restore mytestdb from your backups made on 20190121-1540:

```
DB='mytestdb'
BACKUPDIR='/var/backup/mysql/20190121-1540'
sudo mysql -e "CREATE DATABASE IF NOT EXISTS ${DB}"
sudo -i bash -c 'for table in ${BACKUPDIR}/${DB}/*; do gunzip -c $table | mysql ${DB}; done'
exit
```