How to link static folder in Google app engine with a storage bucket

Question

Created a new python Flask app-engine python project and want to use the static files from Google cloud storage. I am using this yaml.file:

runtime: python
env: flex
entrypoint: gunicorn -b :$PORT main:app

runtime_config:
  python_version: 3

Where in the app engine do you link to storage https://storage.googleapis.com/<your-bucket-name>/static/ with /static in the app-engine? It is not clear from the documentation.

Answer 1

You can't use file stored on Google Cloud Storage as static folder in your App Engine environment. The solution proposed by the documentation is to have 2 sources (2 URL): one for the static file on GCS, the other for the backend on App Engine Flex.

The main issue with this design is the CORS issues. Personally I prefer another design.

• Set up a HTTPS load balancer
• Create a bucket backend to serve your source from GCS
• Create a serverless NEG to serve your dynamic backend (on App Engine flex)
• Customize your Path rule to route correctly the ressource to your respective backends
• Set a unique DNS in front of your HTTPS Load Balancer (no CORS management in this case)