Setup and host GPT-J ML on Banana in minutes

1. Fork this repo

2. Tweak the repo to your liking:

• requirements.txt
  • this file holds the pip dependencies, which are installed via the Dockerfile.
  • add or remove your pip packages, one per line.
• src/download.py
  • this file downloads your model weights to the local file system during the build step.
  • This is an optional file. The only goal is to get your model weights built into the docker image. This example uses a download.py script to download weights. If you can acheive the download through other means, such as a RUN cURL ... from the Dockerfile, feel free.
• src/warmup.py
  • this file defines load_model(), which loads the model from local weights, loads it onto the GPU, and returns the model object.
  • add or remove logic to the load_model() function for any logic that you want to run once at system startup, before the http server starts.
  • the max size of a model is currently limited to 15gb in GPU RAM. Banana does not support greater than that at the moment.
• src/run.py
  • this file defines run_model(), which takes a model object and any arguments and runs an inference/prediction against the model.
  • add or remove logic to the run_model() function for any ML-related logic that you want to run for every call, such as tensor preprocessing, sampling logic in postprocessing, etc.
• src/app.py
  • this file defines the http server (Sanic, in this case, but you can change to Flask) which starts once the load_model() finishes.
  • edit this file to define the API
    • the values you parse from model_inputs defines the JSON schema you'd use as inputs
    • the json you return as model_outputs defines the JSON schema you'd expect as an output

3. Test and verify it works

1. Write an http server in any language

2. Configure it to recieve json POST requests to localhost:8000

3. Test and verify it works

We've provided a few convenience scripts to help you get up and running quickly.

dev/docker-compose.yml is a tool to build and run the dockerfile with the necessary port mapping and GPU permissions.

Run it with:

1. cd dev
2. docker-compose up --build

This will expose your app.py endpoint at localhost:8000 for testing.

Python

Edit the model_inputs object in dev/test.py to fit whatever schema you parse for in src/app.py Run it with: python3 dev/test.py

Bash

Edit the -d {JSON} object in dev/test.sh to fit whatever schema you parse for in src/app.py Run it with: bash dev/test.sh

1. Log into the Banana dashboard and get your API Key

2. Email us at [email protected] with the following message:

Hello, I'd like to be onboarded to serverless.
My github username is: YOUR_GITHUB_USERNAME
My Banana API Key is: YOUR_API_KEY
My preferred billing email is: [email protected]

Your github username, banana api key, and email are required for us to authorize you into the system. We will reply and confirm when you're added.

3. Install the Banana Github App to the forked repo.

4. Push to main to trigger a build and deploy to the hosted backend. This will do nothing if you have not completed the email in step 2 above.

5. Monitor your email inbox for status updates, which will include a unique model key for this repo for you to use through the Banana SDKs.

To continue to the Banana SDKs, find them linked here:

• Python
• Node JS / Typescript
• Go