MariaDB + Phpmyadmin + Docker: Running Local Database

I will get MariaDB and Phpmyadmin running in a docker container. I will reuse folder setup and all files from previous recipe - 02.

Source files can be found here:

https://github.com/ikknd/docker-study in folder recipe-03

1. Modify docker-compose.yml file

Here I do several things:

• create volume -

  mariadb-data

  . This is where all db data will be stored, even if container is restarted, data will be there.
• environment variable

  MYSQL_ROOT_PASSWORD: qwerty

  - sets root password for mariadb container.
• environment variable

  PMA_ARBITRARY=1

  - adds "server" input field to phpmyadmin login page (this way you can use this phpmyadmin with an external MySQL DB, and not just this local setup)
• environment variable

  PMA_HOST=mariadb

  - told phpmyadmin how to connect to mariadb
• map ports for

  phpmyadmin - 8000:80

  - this maps inner port 80 from inside the container, to port 8000 on my host machine
• "

  depends_on

  " - prevents container to start before other container, on which it depends

2. Go to /var/www/docker-study.loc/recipe-03/docker/ and execute:

docker-compose up -d

I can go to:

myapp.loc/

myapp.loc:8000

3. What if I need database to be up and running with some initial DB inside, and not empty?

This can be achieved by modifying

mariadb

command: "mysqld --init-file /data/application/init.sql"

and

volumes:
    - ./init.sql:/data/application/init.sql

• init.sql

  - is an existing DB dump.
• using volumes I copy this file to container's

  /data/application/init.sql

  location
• using "

  mysqld --init-file

  " command - I tell mysql to start and import init.sql

4. After I have DB running, how to export/import DB?

To see list of containers and learn container id or name of mariadb container:

docker container ls

To import:

docker exec -i docker_mariadb_1 mysql -uroot -pqwerty DB_NAME < your_local_db_dump.sql

To export:

docker exec -i docker_mariadb_1 mysqldump -uroot -pqwerty DB_NAME > your_local_db_dump.sql