Make Django's environment Docker (Docker + Django + Gunicorn + nginx) Part 2

Last time has described up to nginx.conf. This time, I would like to write mainly about docker-compose.yml, including the details.

It is open to the public below. Please refer to it together with the article. Dockerize Django Environment

Initial settings of docker-compose.yml

docker-compose.yml

version: '2'
services:
  web:
   restart: always
   build: ./web
   expose:
     - "8000"
   links:
     - postgres:postgres
   command: gunicorn app.wsgi -b 0.0.0.0:8000
   volumes:
     - ./web:/usr/src/app
     - ./web/static/:/usr/src/app/static
  nginx:
    restart: always
    image: nginx
    ports:
      - "80:80"
    volumes:
      - "./nginx/:/etc/nginx/"
      - /www/static
    volumes_from:
      - web
    links:
      - web:web
  postgres:
   image: postgres
   ports:
     - "5432:5432"

1. Definition of container for Django (service name: web)

• In the previous directory structure, the directory for Django was changed to web. Build from the Dockerfile in it.
• The ʻEXPOSE instruction tells dockerto expose a specific network port (in this case,8000`) when the container is run.
• Use the LINKS instruction to link the container with other services. (This time, postgres)
• The command instruction overwrites the command executed when the container is executed. (This time, gunicorn app.wsgi -b 0.0.0.0:8000) * gunicorn will be described separately.
• The volumes instruction declares that the specified directory is a volume. It is specified in relation to (host: container).
• Specify the Django application directory in ./web:/usr/src/app.
• Specify the static file directory with ./web/static/:/usr/src/appstatic.

2. Definition of container for Nginx (service name: nginx)

• Specify the tag or image ID with the ʻIMAGEcommand and pull it. This time, pull thenginx` image.
• The PORTS instruction tells you to forward port 80 on the host and port 80 on the container.
• Instruct the VOLUMES instruction to copy the nginx.conf file under the nginx directory of the host to the / etc / nginx directory of the container.
• The VOLUMES instruction declares that the / www / static directory is explicitly used as a volume. (Directory containing static files)
• The VOLUMES_FROM instruction tells you to mount Web (the directory for Django). (To import static files)

3. Definition of container for PostgreSQL (service name: postgres)

• Pull the postgres image.
• The PORTS instruction tells you to forward port 5432 on the host and port 5432 on the container.

Fitting point

1. Static files cannot be delivered unless the static file directory is explicitly declared as a volume.

Next time, I'll cover the initial setup of the Django framework.