dynoscale 1.1.2

A simple yet efficient scaling agent for Python apps on Heroku

Dynoscale Agent

Simple yet efficient scaling agent for Python apps on Heroku

📖 Usage

1. Add dynoscale to your app on Heroku: heroku addons:create dscale
2. Install dynoscale: python -m pip install dynoscale
   1. Add dynoscale to your app, you can either wrap your app or if you use Gunicorn, you can also just use one of its hooks (pre_request):
      1. If you want to wrap you app (let's look at Flask example):

      from flask import Flask
      
      app = Flask(__name__)
      
      @app.route("/")
      def index():
          return "Hello from Flask!"
      
      if __name__ == "__main__":
          app.run(host='127.0.0.1', port=3000, debug=True)
      

      then just wrap your WSGI app like this

      from flask import Flask
      # FIRST, IMPORT DYNOSCALE
      from dynoscale.wsgi import DynoscaleWsgiApp
      
      app = Flask(__name__)
      
      @app.route("/")
      def index():
          return "Hello from Flask!"
      
      if __name__ == "__main__":
          # THE CHANGE BELOW IS ALL YOU NEED TO DO
          app.wsgi_app = DynoscaleWsgiApp(app.wsgi_app)
          # YUP, WE KNOW, CAN'T GET SIMPLER THAN THAT :)
          app.run(host='127.0.0.1', port=3000, debug=True)
      

   2. Or, if you'd prefer to use the hook, then change your gunicorn.conf.py accordingly instead:

      # This one line will do it for you:
      from dynoscale.hooks.gunicorn import pre_request  # noqa # pylint: disable=unused-import
      

      If you already use the pre_request hook, alias ours and call it manually:

      # Alias the import...
      from dynoscale.hooks.gunicorn import pre_request as hook
      
      # ...and remember to call ours first!
      def pre_request(worker, req):
         hook(worker, req)
         # ...do your own thing...
      

3. Profit! Literally, this will save you money! 💰💰💰 😏

ℹ️ Info

You should consider the dynoscale.wsgi.DynoscaleWsgiApp(wsgi_app) and dynoscale.hooks.gunicorn.pre_request(worker, req) the only two bits of public interface.

🤯 Examples

Feel free to check out ./examples, yes, we do have examples in the repository :)

👩‍💻 Contributing

Install development requirements by running noglob pip install -e .[test] if you use ZSH, or pip install -e .[test] if you're stuck with Bash.

You can run pytest from terminal: pytest

You can run flake8 from terminal: flake8 ./src