Backup container for mariadb instances

This image provides a cron daemon that runs daily backups from mysql (clustered or single instance) to Google Storage.

Following ENV variables must be specified:

MYSQL_HOST contains the remote host (hostname or IP) connection string for mysqldump command line client option -h
mysql.domain.com
MYSQL_PORT contains the remote port number for mysqldump option -P
3306
MYSQL_PASSWORD password of user who has read access to all dbs.
MYSQL_USER mysql user
GS_URL contains address in GS where to store backups, without the gs:// url prefix
bucket-name/directory