docker-compose.yml

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# VHS installation: db, migrate, backend, worker, nginx (see docs/installation.md).
# The VHS images are the ones published for this release on GitHub's container registry: an
# installation pulls them, it never builds them. Their version is changed only by a release
# (CONTRIBUTING.md, "Releasing"). Development uses this same file plus the
# docker-compose.dev.yml override, which builds its own images (docs/development.md);
# docker-compose.build.yml builds the production images locally, to test them before a release.
#
# The video library is a folder of the host, set in .env with VHS_HOST_LIBRARY (see
# docs/installation.md). It must exist before starting and be writable by uid 1000:
#   sudo mkdir -p /srv/vhs/library && sudo chown 1000:1000 /srv/vhs/library
# create_host_path: false -> if the folder is missing, the containers are not created and
# Docker does not create it. PostgreSQL keeps its data in the pgdata volume: never use
# "down -v", which deletes it.

name: vhs

x-library: &library
  type: bind
  source: ${VHS_HOST_LIBRARY:?set VHS_HOST_LIBRARY in .env (e.g. /srv/vhs/library)}
  target: /srv/video-library
  bind:
    create_host_path: false

x-backend: &backend
  image: ghcr.io/rocchidavide/vhs-backend:0.3.0
  env_file:
    - path: .env
      required: false
  environment:
    POSTGRES_HOST: db
    POSTGRES_PORT: "5432"
    VHS_MEDIA_ROOT: /srv/video-library
    DJANGO_STATIC_ROOT: /srv/static
  volumes:
    - *library

services:
  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_DB: ${POSTGRES_DB:-vhs}
      POSTGRES_USER: ${POSTGRES_USER:-vhs}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vhs}
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
      interval: 5s
      timeout: 5s
      retries: 10

  migrate:
    <<: *backend
    command: sh -c "python manage.py migrate --noinput && python manage.py collectstatic --noinput && python manage.py reconcile_downloads"
    volumes:
      - *library
      - static:/srv/static
    depends_on:
      db:
        condition: service_healthy

  backend:
    <<: *backend
    command: uvicorn config.asgi:application --host 0.0.0.0 --port 8000 --proxy-headers --forwarded-allow-ips="*"
    depends_on:
      migrate:
        condition: service_completed_successfully
    healthcheck:
      test:
        - CMD
        - python
        - -c
        # Host header: the first DJANGO_ALLOWED_HOSTS entry, since Django rejects any other
        # host (a real installation rarely lists "localhost").
        - >-
          import os, urllib.request;
          host = os.environ.get('DJANGO_ALLOWED_HOSTS', 'localhost').split(',')[0].strip().lstrip('.');
          host = 'localhost' if host in ('', '*') else host;
          urllib.request.urlopen(urllib.request.Request('http://127.0.0.1:8000/api/v1/health', headers={'Host': host}), timeout=3)
      interval: 10s
      timeout: 5s
      retries: 5

  worker:
    <<: *backend
    command: python manage.py qcluster
    depends_on:
      migrate:
        condition: service_completed_successfully

  nginx:
    image: ghcr.io/rocchidavide/vhs-nginx:0.3.0
    ports:
      - "${VHS_HTTP_PORT:-1976}:80"
    volumes:
      - <<: *library
        read_only: true
      - static:/srv/static:ro
    depends_on:
      backend:
        condition: service_healthy

volumes:
  pgdata:
  static: