Two Docker containers of the same application.

Docker Engine Compose
1

Hello!
I’d like to have two docker containers of the same app, but with diff ports.
There are containers should use the same volumes.
I deploy using gitlab runner.

So, compose file:

version: "3.9"

volumes:
  static_volume:
    external: true
    name: static
  media_volume:
    external: true
    name: media

networks:
  reservation_net:
    external: true

services:
  api:
    image: app_image
    container_name: api
    build:
      context: ./
      dockerfile: ./docker/api/Dockerfile
    restart: always
    env_file:
      - .env
    volumes:
      - .:/api/
      - static_volume:/api/static
      - media_volume:/api/media
    networks:
      - reservation_net
    depends_on:
      - db

  api_2:
    image: app_image
    container_name: reservation_api_2
    build:
      context: ./
      dockerfile: ./docker/api_2/Dockerfile
    restart: always
    env_file:
      - .env
    volumes:
      - .:/api/
      - static_volume:/api/static
      - media_volume:/api/media
    networks:
      - reservation_net
    depends_on:
      - db

Runner file:

stages:
  - deploy
deploy_api:
  when: manual
  stage: deploy
  script:
   - sudo docker-compose -f compose-dev.yaml down api
    - sudo docker-compose -f compose-dev.yaml up -d --build api
  only:
    - Dev
  tags:
    - dev

deploy_api_2:
  when: manual
  stage: deploy
  script:
    - sudo docker-compose -f compose-dev.yaml down api_2
    - sudo docker-compose -f compose-dev.yaml up -d --build api_2
  only:
    - Dev
  tags:
    - dev

Problem:
When I start job by app everything is fine. Then I start job app_2. After that, my static and meida volumes in container with app unavailable.
When I do
docker exec -it app bash
then
ls -l api/media - empty.
But into container with app_2 - all ok.
If I repeat job 1 and recreate container 1 with app, volumes in that container available, but itno app_2 - not.
In general, whichever container starts last, there are volumes, but the previous one - empty.

2

Check /app/media vs /api/media.

1 Like
3

Sorry, I made a mistake in the description.
Of course I checked the api/media folder in the container.
And here is empty.

4

You have a spelling error, one time it’s app, one time it’s api. Is the mount correct, the folder correct which you check?