docker container mariadb volumes

Question

I have a MariaDB container, to handle my database.

Here is my problem, I execute :

docker-compose exec mariadb mysql -u root 

to enter MariaDB container and create a test database, then exit the container, and shut it down through command :

docker-compose down 

After that, I start back all my containers through command

docker-compose up

go back inside the MariaDB container to see if the database I added persisted but, I found out it did not. I thought I had correctly parameterized MariaDB volumes through this line in my docker-compose :

- '/bitnami/mariadb/:/var/lib/mysql'

Here is my complete docker-compose.yml file :

version: '2'
services:
 myapp:
  image: 'bitnami/symfony:1'
  ports:
    - '8000:8000'
  volumes:
    - '.:/app'
  environment:
    - SYMFONY_PROJECT_NAME=backend
    - MARIADB_HOST=mariadb
    - MARIADB_PORT_NUMBER=3306
    - MARIADB_USER=monty
    - MARIADB_PASSWORD=monty
    - MARIADB_DATABASE=test
  container_name: symfony_container
  depends_on:
    - mariadb
mariadb:
  image: 'bitnami/mariadb:10.3'
  ports:
    - '3306:3306'
  volumes:
    - '/bitnami/mariadb/:/var/lib/mysql'
  environment:
    - ALLOW_EMPTY_PASSWORD=yes
    - MARIADB_DATABASE=test
    - MARIADB_PORT_NUMBER=3306
    - MARIADB_ROOT_USER=root
    - MARIADB_USER=monty
    - MARIADB_PASSWORD=monty
  container_name: mariadb

If anyone have any leads for me I'll be greatfull.

Answer 1

You've got the volume line reversed.

- '/bitnami/mariadb/:/var/lib/mysql'

That mounts the host directory /bitnami/mariadb/ inside the container at /var/lib/mysql . Instead you want:

- '/var/lib/mysql/:/bitnami/mariadb/'

The image documentation specifies the target directory here: https://github.com/bitnami/bitnami-docker-mariadb/blob/master/README.md#persisting-your-database