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DEPLOYMENT.md

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Deployment

The MEEP stack is currently deployed on Render.

It uses 4 services:

  • A web service for the django backend
  • A postgres database for the django backend
  • A background worker for the queue workers
  • A web service for the nextjs frontend

Backend

Environment Variables

The backend services require the following environment variables:

  • BASE_URL: The url (with https://, no trailing slash) of the backend site
  • CACHE_FILE: A file (e.g. /tmp/meep) that will be used for the Mapit data cache
  • DATABASE_URL: The postgres database URL
  • MAPIT_API_KEY
  • MAPIT_URL: The URL to the mapit service (probably https://mapit.mysociety.org/)
  • SECRET_KEY: A django-style secret key for use in crypto functions

The backend web server also requires:

  • ALLOWED_HOSTS: A comma-separated list of backend hosts (no https, no trailing slash)
  • CORS_ALLOWED_ORIGINS: A comma-separated list of frontend origins (with https://, no trailing slash)
  • GOOGLE_ANALYTICS
  • GOOGLE_SITE_VERIFICATION

Launch Commands

The prelaunch command is: python manage.py migrate

Web server launch command

The web server launch command is: python manage.py collectstatic --noinput && python manage.py compress --force && gunicorn local_intelligence_hub.wsgi

The collectstatic and compress commands are required at launch, because their output is lost in prelaunch.

The compress command is required to generate compressed front-end assets (using the django-compressor library). Normally this would be done on the fly, but that doesn't work with whitenoise, which requires all assets to exist when the server starts up.

Worker launch command

The worker launch command is: python manage.py procrastinate worker

Launch Commands

The pre-launch command is: npm install && npm run build

The launch command is npm start