App Platform is a great concept, but we hit a dealbreaking road block when trying to migrate some Python apps with job queues. Their runtime (gVisor) doesn't support semaphore locks, which is used by Pythons multiprocessing and in turn used by most job runners (we discovered it with django-q, but I think most, if not all of them including Celery, rely on this, see link below).

The build times for Dockerfiles are also atricious… our build failed after 40 minutes by running out of memory and the multi-stage Dockerfile really wasn't anything special. We would have just used the images hosted on Github Container Registry, but App Platform only supports a limited range of Docker registries too. Note: the images build in 3 minutes on Github Actions.

As far as I can see it is also not possible to add any block storage too. While I mostly work on projects that use object storage anyway, SOME things just need persistent block storage. Which is annoying, since DigitalOcean HAS block storage… just not for App Platform.

I really wanted to use it, but man they make it hard.

https://github.com/Koed00/django-q/issues/522#issuecomment-1...