For improved reliability, MariaDB can be used in a cluster for production sites. This example, when placed in .lagoon.yml will enable Galera on the production branch.

      mariadb: mariadb-galera

also you will need to change your service definition in your docker-compose.yml

    image: amazeeio/mariadb-galera-drupal
      lagoon.type: mariadb
      - "3306" # exposes the port 3306 with a random local port, find it with `docker-compose port mariadb 3306`
      << : *default-environment

It is recommended to configure the environment before the initial deploy of the production site, otherwise manual intervention may be needed from your lagoon administrator.

Additional MariaDB Logging

During the course of development, it may be necessary to enable either query logging or slow query logging. To do so just set the environment variables MARIADB_LOG_SLOW or MARIADB_LOG_QUERIES. This can be done in docker-compose.yaml.

Connecting to MySQL's container from the host

If you like to connect to MySQL's Database inside the Docker container with an external Tool like Sequel Pro, MySQL Workbench, HeidiSQL, DBeaver, just plain old mysql-cli or anything else.

Get published MySQL port from the container

By default, Docker assigns a randomly published port for MySQL during each container start. This is done to prevent port collisions.

To get the published port via docker:

Run: docker port[container_name]

$ docker port drupal_example_mariadb_1
3306/tcp ->

Or via docker-compose inside a Drupal repository

Run: docker-compose port [service_name] [interal_port]

$ docker-compose port mariab 3306

During development, if you are using an external database tool it may become cumbersome to continually check and set MySQL connection port.

To set a static port; edit your service definition in your docker-compose.yml

      - "33772:3306" # exposes port 3306 with a 33772 on the host port. Note by doing this you are responsible for managing port collisions`


By setting a static port you become responsible for maniging port collisions.

Connect to MySQL

Linux OS X
IP/Host ip from container
Port published port from container published port from container
Username drupal drupal
Password drupal drupal
Database drupal drupal