clancy/Notes at main · blackxavier/clancy · GitHub

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Reference Blog
- https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/
Tini
- https://hub.docker.com/r/krallin/ubuntu-tini
- https://computingpost.medium.com/how-to-use-tini-init-system-in-docker-containers-69283d0099ed


Notable Commands
- python manage.py collectstatic --no-input --clear
- docker-compose -f docker-compose-prod.yml down -v
- docker-compose -f docker-compose-prod.yml up -d --build
- docker-compose -f docker-compose-prod.yml exec web python manage.py migrate --noinput
- docker-compose -f docker-compose-prod.yml exec web python manage.py collectstatic --no-input --clear

Services :
- web (Django app running running behind a gunicorn application server)
  This service is built from the app/ folder that contains a Dockerfile. The Dockerfile uses multi-stage
  build to reduce image size. It mount two volumes (static_volume and media_volume). The static_volume maps to the /home/app/web/staticfiles path on the web container.
  This volume is later mounted in the nginx container so is can access the static files.
  The media_volume is mounted on the web path (/home/app/web/mediafiles), this volume is also accessible by the nginx container
  web exposes port 8000, this allows the nginx container to pass request to it. It also contains a file that stores environment varaibles.


- db (A postgres db)
  This service runs the postgres:15 image, sets a shared memory limit and has a flag that restarts the container if it is stopped.

- nginx
  This service is build from the nginx/ directory. It uses the nginx:1.25 image as a base image. It binds port 80 on both ends and attaches 2 volumes
  (media_volume & static_volume). It also depends on the web which means the web service must finish botting before it starts.

- adminer
  This is a DBMS for the postgres database used in this setup.

- dozzle
  This uses the amir20/dozzle:latest image and bind the docker socket on the host to the socket in the container. It uses this to give graphical information
  about the services running on the host.

- pgadmin
  This is another DBMS for the postgres database used in this setup.

The django app displays a simple interface that is used to upload a file and displays the path to that file in storage.

Commands to deploy using docker stack
- docker stack deploy registry --compose-file docker-stack-registry.yml
- docker-compose -f docker-compose-stack.yml build
- docker-compose -f docker-compose-stack.yml push
- docker stack deploy djangostack --compose-file docker-compose-stack.yml