CODEWITHSUNDEEP
dockerdocker-composedockerfile
Hedge
Hedge

Reputation: 16748

Create and mount data-only containers with docker-compose

ocker 1.9 introduced a new volume API for creating data only containers (via docker volume create). Is it possible to create those and mount them via docker-compose?

I would like to create a data only container to store data from my MySQL database (https://hub.docker.com/_/mysql/). Sadly I couldn't find any documentation whether it is possible with docker-compose itself.

Is it possible as of Docker Compose 1.6.2. and if yes, how?

Upvotes: 1

Views: 2231

Answers (2)

Hassan Saeed
Hassan Saeed

Reputation: 7100

if you want to cretae and store database data make docker-compose.yml will look like if you want to use Dockerfile

version: '3.1'

services:
  php:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - 80:80
    volumes:
      - ./src:/var/www/html/
  db:
    image: mysql
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: example
    volumes:
      - mysql-data:/var/lib/mysql

  adminer:
    image: adminer
    restart: always
    ports:
      - 8080:8080
volumes:
  mysql-data:

your docker-compose.yml will looks like if you want to use your image instead of Dockerfile

version: '3.1'   

services:
  php:
    image: php:7.4-apache
    ports:
      - 80:80
    volumes:
      - ./src:/var/www/html/
  db:
    image: mysql
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: example
    volumes:
      - mysql-data:/var/lib/mysql

  adminer:
    image: adminer
    restart: always
    ports:
      - 8080:8080
volumes:

if you want to store or preserve data of mysql then must remember to add two lines in your docker-compose.yml

volumes:
  - mysql-data:/var/lib/mysql

and

volumes:
  mysql-data:

after that use this command

docker-compose up -d

now your data will persistent and will not be deleted even after using this command

docker-compose down

extra:- but if you want to delete all data then you will use

docker-compose down -v

Upvotes: 0

VonC
VonC

Reputation: 1324935

Considering that compose/volume.py#L23 does include a volume.create() method, it should be possible.

See the volume section of Compose file reference:

volumes:
  # Just specify a path and let the Engine create a volume
  - /var/lib/mysql
 # Named volume
  - datavolume:/var/lib/mysql

That would call docker volume create.

Upvotes: 2

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