About

The docker-mysql-backup image is meant to be run alongside a deployment that features a mysql/mariadb container that needs to be backed up.

The backup is performed using mydumper, a fast MySQL backup utility.

Usage

Add a service to your docker-compose file like so:

version: '2'

volumes:
  db-data:

services:
  mysql:
    image: mysql
    volumes:
      - db-data:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD
      - MYSQL_DATABASE
      - MYSQL_USER
      - MYSQL_PASSWORD
    restart: unless-stopped
    ports:
      - 3406:3306
  backup:
    image: nikosch86/docker-mysql-backup:develop
    volumes:
        - ./data/backup:/backup
    environment:
      - MYSQL_ROOT_PASSWORD

as you can see it is best practice to store your mysql secrets in a .env file, so both containers have access to it
the minimal viable configuration just needs the root password, it will backup all databases and look for a container named mysql on port 3306
be aware, the backup container will create the folder /backup and use UID and GID 1000 to own it.
That means any folder mounted to the /backup location will be affected by that.

additional configuration can be done by using these environment variables:

• MYSQL_CONTAINER
• MYSQL_PORT
• MYSQL_DATABASE
• BACKUP_UID
• BACKUP_GID
• UMASK
• BASE_DIR
• MODE
• RESTORE_DIR
• OPTIONS

BASE_DIR is the directory the backups will be written to inside the container.

setting OPTIONS will override the options set for mydumper / myloader

The container will stop automatically as soon as the backup is done. To start backing up you need to start the container.

docker-compose up -d backup

restore

To restore a backup, the environment variable MODE needs to be set to RESTORE
RESTORE_DIR needs to be set to the directory of your backup
Starting the container will use myload to restore the specified backup into the
specified container and database