Initially cloned from https://github.com/khoanguyen96/dockerfiles/tree/master/percona-xtrabackup

Percona XtraBackup Docker Image

Alpine Docker Image with Percona XtraBackup v2.3.8

Background Info

A beautifully written tutorial by Digital Ocean

Included Scripts

The included bash scripts are based on the scripts provided by the DO Tutorial. Only changes made were to remove the backup user check. As this isn't necessary as the docker container runs the scripts as root.

backup-mysql.sh
extract-mysql.sh
prepare-mysql.sh

Creating the Backup User

Follow the tutorial in creating a backup user in your MySQL database, and creating the backup.cnf file storing the backup user's credentials into a backup.cnf like so:

[client]
user=backup
password=password

Running the Provided Scripts

It's definitely possible to do this with a docker-compose.yml file. Incoming example soon tm.

Backing up the Database

When running backups, it'll be ideal to bind mount the /backups/mysql directory to a directory on the host, where you would want to store your database backups.

If your MySQL instance is hosted locally, bind mount the data directory of the MySQL instance.

docker run --rm \
-v /var/lib/mysql:/var/lib/mysql \
-v /etc/mysql/backup.cnf:/etc/mysql/backup.cnf \
-v /home/sysadmin/backups:/backups/mysql
khoanguyent/percona \
backup-mysql.sh

If your MySQL instance is hosted inside a Docker container, make sure the /var/lib/mysql data directory is mounted as a Docker volume. This way the Percona container can inherit the MySQL Data volume when running backups.

docker run --rm \
-v /etc/mysql/backup.cnf:/etc/mysql/backup.cnf \
-v /home/sysadmin/backups:/backups/mysql \
--volumes-from db \
khoanguyent/percona \
backup-mysql.sh

NOTE: Replace db with the container name of your MySQL instance.